Pub Date : 2024-10-23DOI: 10.1016/j.ccst.2024.100329
<div><div>Cryogenic carbon capture (CCC) designed to operate in a contact liquid is an innovative technology for capturing <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> from industrial flue gases, helping mitigate climate change. Understanding <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> desublimation properties in a contact liquid is crucial to optimizing CCC, but is challenging due to the complex physics involved. In this work, a multiphysics lattice Boltzmann (LB) model is developed to investigate <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> desublimation in a contact liquid for various operating conditions, with the multiple and fully-coupled physics being incorporated (i.e., two-phase flow, heat transfer across three phases, <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> transport between the gas and liquid, homogeneous and heterogeneous desublimation of <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span>, and solid <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> generation). The <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> desublimation process in a contact liquid is well reproduced. Moreover, parametric studies and quantitative analyses are set out to identify optimal conditions for CCC. The decreasing liquid temperature (<span><math><msub><mi>T</mi><mi>l</mi></msub></math></span>) and flue gas temperature (<span><math><msub><mi>T</mi><mn>0</mn></msub></math></span>) are found to accelerate the <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> desublimation rate and enhance the <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> capture velocity (<span><math><msub><mi>v</mi><mi>c</mi></msub></math></span>). However, excessively low <span><math><msub><mi>T</mi><mi>l</mi></msub></math></span> and <span><math><msub><mi>T</mi><mn>0</mn></msub></math></span> values should be avoided. These conditions increase the energy consumption of cooling while only marginally improving <span><math><msub><mi>v</mi><mi>c</mi></msub></math></span>, due to the limited <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> supply. The CCC system performs effectively when purifying flue gases with high <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> content (<span><math><msub><mi>Y</mi><mn>0</mn></msub></math></span>). This is because the large <span><math><msub><mi>Y</mi><mn>0</mn></msub></math></span> accelerates the <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> desublimation rate and enhances the overall <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> capture efficiency. A high gas injection velocity (or <span><math><mtext>Pe</mtext></math></span>) is beneficial for amplifying <span><math><msub><mi>v</mi><mi>c</mi></msub></math></span> by increasing the gas–liquid interfaces and enhancing the <span><math><msub><mtext>CO
在接触液中运行的低温碳捕集（CCC）是一种从工业烟气中捕集二氧化碳的创新技术，有助于减缓气候变化。了解接触液中的二氧化碳脱华特性对于优化 CCC 至关重要，但由于涉及复杂的物理过程，因此具有挑战性。在这项工作中，开发了一个多物理场格子玻尔兹曼（LB）模型，用于研究接触液中二氧化碳在各种操作条件下的脱附情况，其中包含多种完全耦合的物理场（即两相流、三相传热、气体和液体之间的二氧化碳传输、二氧化碳的均相和异相脱附及固体二氧化碳生成）。接触液体中的二氧化碳升华过程得到了很好的再现。此外，还进行了参数研究和定量分析，以确定 CCC 的最佳条件。研究发现，降低液体温度（Tl）和烟道气温度（T0）可加快二氧化碳脱华速度，提高二氧化碳捕获速度（vc）。但应避免 Tl 和 T0 值过低。由于二氧化碳供应量有限，这些条件会增加冷却能耗，但只能略微提高 vc。在净化二氧化碳含量（Y0）较高的烟气时，CCC 系统能有效发挥作用。这是因为较大的 Y0 会加快 CO2 的脱附速度，提高整体 CO2 捕获效率。较高的气体注入速度（或 Pe）有利于通过增加气液界面和提高二氧化碳供应量来放大 vc。然而，应避免过高的 Pe 值，因为它会阻碍二氧化碳向液态或固态二氧化碳表面的传输，最终限制了可用于解升华的二氧化碳量，并抑制 vc 值的提高。本研究开发了一种可行的 LB 方法，用于研究不同条件下接触液体中的二氧化碳脱华情况，从而推动了 CCC 知识库的发展，并促进了其工业应用。
{"title":"Pore-scale study of CO2 desublimation in a contact liquid","authors":"","doi":"10.1016/j.ccst.2024.100329","DOIUrl":"10.1016/j.ccst.2024.100329","url":null,"abstract":"<div><div>Cryogenic carbon capture (CCC) designed to operate in a contact liquid is an innovative technology for capturing <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> from industrial flue gases, helping mitigate climate change. Understanding <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> desublimation properties in a contact liquid is crucial to optimizing CCC, but is challenging due to the complex physics involved. In this work, a multiphysics lattice Boltzmann (LB) model is developed to investigate <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> desublimation in a contact liquid for various operating conditions, with the multiple and fully-coupled physics being incorporated (i.e., two-phase flow, heat transfer across three phases, <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> transport between the gas and liquid, homogeneous and heterogeneous desublimation of <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span>, and solid <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> generation). The <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> desublimation process in a contact liquid is well reproduced. Moreover, parametric studies and quantitative analyses are set out to identify optimal conditions for CCC. The decreasing liquid temperature (<span><math><msub><mi>T</mi><mi>l</mi></msub></math></span>) and flue gas temperature (<span><math><msub><mi>T</mi><mn>0</mn></msub></math></span>) are found to accelerate the <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> desublimation rate and enhance the <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> capture velocity (<span><math><msub><mi>v</mi><mi>c</mi></msub></math></span>). However, excessively low <span><math><msub><mi>T</mi><mi>l</mi></msub></math></span> and <span><math><msub><mi>T</mi><mn>0</mn></msub></math></span> values should be avoided. These conditions increase the energy consumption of cooling while only marginally improving <span><math><msub><mi>v</mi><mi>c</mi></msub></math></span>, due to the limited <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> supply. The CCC system performs effectively when purifying flue gases with high <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> content (<span><math><msub><mi>Y</mi><mn>0</mn></msub></math></span>). This is because the large <span><math><msub><mi>Y</mi><mn>0</mn></msub></math></span> accelerates the <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> desublimation rate and enhances the overall <span><math><msub><mtext>CO</mtext><mn>2</mn></msub></math></span> capture efficiency. A high gas injection velocity (or <span><math><mtext>Pe</mtext></math></span>) is beneficial for amplifying <span><math><msub><mi>v</mi><mi>c</mi></msub></math></span> by increasing the gas–liquid interfaces and enhancing the <span><math><msub><mtext>CO","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-19DOI: 10.1016/j.ccst.2024.100300
Direct air capture (DAC) is a critical and emerging Negative Emissions Technology (NET) that directly removes CO2 from the atmosphere, significantly contributing to climate change. However, the deployment and management of large-scale DAC faces challenges such as collections and analysis of energy consumption data, intricate device and system management, emission prediction and operation strategy, precise carbon footprint tracking, etc. This paper proposes the integration of blockchain technology with DAC systems to address these challenges, utilizing blockchain's inherent properties of immutability, security, and transparency. The implementation strategy includes the development of a DAC consortium blockchain system, leveraging a consensus mechanism,1 ECDSA encryption,2 IoT3 integration, and digital signatures. Preliminary modeling of the proposed system suggests potential improvements in operational efficiency and a reduction in data inaccuracies. The proposed system underscores the system's ability to streamline identity verification, improve data collection accuracy, and facilitate secure, confidential information sharing among DAC stakeholders. By enhancing the efficiency and reliability of DAC operations, this approach supports the scalable and effective deployment of NETs in the global effort to combat climate change. Future research will focus on empirical validation through pilot projects and simulations to further substantiate these claims.
{"title":"Advancing the deployment and information management of direct air capture: A solution enabled by integrating consortium blockchain system","authors":"","doi":"10.1016/j.ccst.2024.100300","DOIUrl":"10.1016/j.ccst.2024.100300","url":null,"abstract":"<div><div>Direct air capture (DAC) is a critical and emerging Negative Emissions Technology (NET) that directly removes CO2 from the atmosphere, significantly contributing to climate change. However, the deployment and management of large-scale DAC faces challenges such as collections and analysis of energy consumption data, intricate device and system management, emission prediction and operation strategy, precise carbon footprint tracking, etc. This paper proposes the integration of blockchain technology with DAC systems to address these challenges, utilizing blockchain's inherent properties of immutability, security, and transparency. The implementation strategy includes the development of a DAC consortium blockchain system, leveraging a consensus mechanism,<span><span><sup>1</sup></span></span> ECDSA encryption,<span><span><sup>2</sup></span></span> IoT<span><span><sup>3</sup></span></span> integration, and digital signatures. Preliminary modeling of the proposed system suggests potential improvements in operational efficiency and a reduction in data inaccuracies. The proposed system underscores the system's ability to streamline identity verification, improve data collection accuracy, and facilitate secure, confidential information sharing among DAC stakeholders. By enhancing the efficiency and reliability of DAC operations, this approach supports the scalable and effective deployment of NETs in the global effort to combat climate change. Future research will focus on empirical validation through pilot projects and simulations to further substantiate these claims.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-17DOI: 10.1016/j.ccst.2024.100314
Carbon capture utilization and storage (CCUS) emerges as a pivotal strategy for CO2 reduction in the power sector, particularly focusing on the overlooked domain of offshore storage along China's east coast. In spite of the potential high costs, irreversible investments, and lengthy development, offshore storage can still be prospective. Considering autonomous decision-making among emission sources, this study pioneers a CO2 offshore storage investment decision model tailored for coal-fired and gas-fired power plants. Innovating an offshore storage source-sink matching model with a real options model and introducing a pipeline network optimization model allows a realistic source-sink matching strategy to be explored under optimal investment timing. According to the results, among 154 large stationary emission sources in Zhejiang Province, offshore storage could reduce CO2 emissions by 4.59 Gt, utilizing the Qiantang, Minjiang, and Fuzhou depressions. It is economically feasible to implement offshore storage with a whole-process unit cost of 368.8 CNY/tCO2, mainly dominated by capture costs. A hybrid carbon tax-subsidy policy promotes carbon reduction and economic benefits, offering a more effective incentive for emission sources to invest in offshore storage than a single policy. At a hybrid policy price of 250 CNY/tCO2, all 27 selected emission sources are projected to invest in offshore storage by 2048, with a preference for the Qiantang depression as the storage site. Practically, this study provides important technical support and guidance for the large-scale deployment of offshore storage.
碳捕集利用与封存（CCUS）已成为电力行业减少二氧化碳排放的关键战略，尤其是在中国东部沿海被忽视的海上封存领域。尽管潜在成本高、投资不可逆、开发周期长，但海上封存仍具有广阔前景。考虑到排放源之间的自主决策，本研究为燃煤和燃气电厂量身定制了一个二氧化碳海上封存投资决策模型。利用实物期权模型对离岸封存源汇匹配模型进行创新，并引入管网优化模型，从而探索出最优投资时机下的现实源汇匹配策略。研究结果表明，在浙江省 154 个大型固定排放源中，利用钱塘江、闽江和福州洼地进行海上封存可减少 CO2 排放 4.59 Gt。实施海上封存在经济上是可行的，全过程单位成本为 368.8 元人民币/吨二氧化碳，主要由捕集成本决定。碳税-补贴混合政策既能促进碳减排，又能提高经济效益，与单一政策相比，能更有效地激励排放源投资海上封存。在 250 元人民币/吨 CO2 的混合政策价格下，预计到 2048 年，所有 27 个选定的排放源都将投资海上封存，并优先选择钱塘江坳陷作为封存地点。该研究为大规模部署海上封存提供了重要的技术支持和指导。
{"title":"Offshore carbon storage from power plants based on real option and multi‐period source‐sink matching: A case study in the eastern coastal China","authors":"","doi":"10.1016/j.ccst.2024.100314","DOIUrl":"10.1016/j.ccst.2024.100314","url":null,"abstract":"<div><div>Carbon capture utilization and storage (CCUS) emerges as a pivotal strategy for CO<sub>2</sub> reduction in the power sector, particularly focusing on the overlooked domain of offshore storage along China's east coast. In spite of the potential high costs, irreversible investments, and lengthy development, offshore storage can still be prospective. Considering autonomous decision-making among emission sources, this study pioneers a CO<sub>2</sub> offshore storage investment decision model tailored for coal-fired and gas-fired power plants. Innovating an offshore storage source-sink matching model with a real options model and introducing a pipeline network optimization model allows a realistic source-sink matching strategy to be explored under optimal investment timing. According to the results, among 154 large stationary emission sources in Zhejiang Province, offshore storage could reduce CO<sub>2</sub> emissions by 4.59 Gt, utilizing the Qiantang, Minjiang, and Fuzhou depressions. It is economically feasible to implement offshore storage with a whole-process unit cost of 368.8 CNY/t<sub>CO2</sub>, mainly dominated by capture costs. A hybrid carbon tax-subsidy policy promotes carbon reduction and economic benefits, offering a more effective incentive for emission sources to invest in offshore storage than a single policy. At a hybrid policy price of 250 CNY/t<sub>CO2</sub>, all 27 selected emission sources are projected to invest in offshore storage by 2048, with a preference for the Qiantang depression as the storage site. Practically, this study provides important technical support and guidance for the large-scale deployment of offshore storage.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-10DOI: 10.1016/j.ccst.2024.100322
Formic acid is a promising hydrogen storage medium that can be produced via the catalytic hydrogenation of CO2. Compared with heterogeneous catalysts, homogeneous catalysts composed of organic metal complexes, especially Ru- and Ir-based catalysts, show higher activity and selectivity for the catalytic reaction of CO2 hydrogenation to formic acid; however, it is difficult to separate them from the reaction products. Heterogeneous catalysts prepared by immobilizing metal complexes onto solid materials demonstrate high activity and selectivity, similar to homogeneous catalysts, and solve the problem of catalyst separation. For preparing such catalysts, the choice of support is particularly important because effective anchoring is the key to realize catalyst recycling. Supported heterogeneous catalysts are mainly based on inorganic oxides and porous polymers (e.g., metal-organic frameworks, covalent organic frameworks, and organic polymers). This review comprehensively examines the advancements in immobilized heterogeneous catalysts for the hydrogenation of CO2, focusing on support materials, reaction mechanisms, catalyst immobilization conditions, and the impact of various reaction conditions on catalytic performance. Furthermore, we provide a comparative analysis of immobilized catalysts and their homogeneous counterparts, underlining the advantages of site isolation and the role of support materials in enhancing catalytic activity. The design and development of immobilized heterogeneous catalysts are important in the field of CO2 hydrogenation to formic acid because of their abundant active sites, excellent catalytic stability, flexible chemical modifiability, and low preparation cost. We conclude with perspectives on future research directions, emphasizing the need for innovative catalyst designs and optimization of reaction conditions to achieve sustainable and economically viable CO2 hydrogenation processes.
甲酸是一种前景广阔的储氢介质，可通过催化 CO2 加氢生成。与异相催化剂相比，由有机金属络合物组成的均相催化剂，尤其是基于 Ru 和 Ir 的催化剂，在 CO2 加氢生成甲酸的催化反应中表现出更高的活性和选择性，但很难将它们从反应产物中分离出来。将金属络合物固定在固体材料上制备的异相催化剂具有与均相催化剂类似的高活性和高选择性，并解决了催化剂分离的问题。在制备此类催化剂时，载体的选择尤为重要，因为有效的锚定是实现催化剂循环利用的关键。支撑型异相催化剂主要基于无机氧化物和多孔聚合物（如金属有机框架、共价有机框架和有机聚合物）。本综述全面探讨了用于 CO2 加氢的固定化异质催化剂的研究进展，重点关注支撑材料、反应机理、催化剂固定化条件以及各种反应条件对催化性能的影响。此外，我们还对固定化催化剂和均相催化剂进行了比较分析，强调了位点分离的优势和支撑材料在提高催化活性方面的作用。固定化异相催化剂具有丰富的活性位点、优异的催化稳定性、灵活的化学修饰性和低廉的制备成本，因此其设计和开发在 CO2 加氢制甲酸领域具有重要意义。最后，我们展望了未来的研究方向，强调了创新催化剂设计和优化反应条件的必要性，以实现可持续且经济可行的二氧化碳加氢工艺。
{"title":"Immobilized heterogeneous catalysts for CO2 hydrogenation to formic acid: A review","authors":"","doi":"10.1016/j.ccst.2024.100322","DOIUrl":"10.1016/j.ccst.2024.100322","url":null,"abstract":"<div><div>Formic acid is a promising hydrogen storage medium that can be produced via the catalytic hydrogenation of CO<sub>2</sub>. Compared with heterogeneous catalysts, homogeneous catalysts composed of organic metal complexes, especially Ru- and Ir-based catalysts, show higher activity and selectivity for the catalytic reaction of CO<sub>2</sub> hydrogenation to formic acid; however, it is difficult to separate them from the reaction products. Heterogeneous catalysts prepared by immobilizing metal complexes onto solid materials demonstrate high activity and selectivity, similar to homogeneous catalysts, and solve the problem of catalyst separation. For preparing such catalysts, the choice of support is particularly important because effective anchoring is the key to realize catalyst recycling. Supported heterogeneous catalysts are mainly based on inorganic oxides and porous polymers (e.g., metal-organic frameworks, covalent organic frameworks, and organic polymers). This review comprehensively examines the advancements in immobilized heterogeneous catalysts for the hydrogenation of CO<sub>2</sub>, focusing on support materials, reaction mechanisms, catalyst immobilization conditions, and the impact of various reaction conditions on catalytic performance. Furthermore, we provide a comparative analysis of immobilized catalysts and their homogeneous counterparts, underlining the advantages of site isolation and the role of support materials in enhancing catalytic activity. The design and development of immobilized heterogeneous catalysts are important in the field of CO<sub>2</sub> hydrogenation to formic acid because of their abundant active sites, excellent catalytic stability, flexible chemical modifiability, and low preparation cost. We conclude with perspectives on future research directions, emphasizing the need for innovative catalyst designs and optimization of reaction conditions to achieve sustainable and economically viable CO<sub>2</sub> hydrogenation processes.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-03DOI: 10.1016/j.ccst.2024.100321
Calcium looping (CaL) process, as an effective way to achieve CO2 mitigation from high-temperature flue gas streams, is one of the most promising alternatives to amine scrubbing (a well-established technology for industrial post-combustion CO2 capture). CaO sorbent is considered to be an ideal CO2 adsorption material. Moreover, the development of granulation/pelletization techniques along with the mass preparation of the CaO-based sorbent is imperative for realistic large-scale applications. This work proposes two practicable moulding-crushing techniques for the scale-up granulation of CaO-based sorbents, in which the kilogram-scale produced Al-promoted CaO-based sorbent powders were first moulded and subsequently crushed into the granules of target sizes. Three types of organic acids–acetic acid, citric acid and malonic acid were employed as peptizing agents to optimize the granulation process. As a result, the anti-attrition properties and compressive strength of the synthetic sorbents were elevated owing to the introduction of an appropriate amount of acetic or malonic acid, for it expedited the disintegration of the pseudo-boehmite (served as binder agent) particles into sol particles, which allowed for tighter bonding of sorbent particles. In addition, corncob powder acted as a pore-forming agent, enhancing the porous structure of the sorbent particles due to the gases released from the thermal decomposition of organic groups during calcination. Nevertheless, the results revealed that the porous and loose structure adversely affected the mechanical strength of the granules.
钙循环（CaL）工艺是实现高温烟道气流二氧化碳减排的有效方法，是胺洗涤（一种成熟的工业燃烧后二氧化碳捕集技术）最有前途的替代技术之一。氧化钙吸附剂被认为是一种理想的二氧化碳吸附材料。此外，在大规模制备 CaO 基吸附剂的同时，开发造粒/造粒技术也是实际大规模应用的当务之急。本研究提出了两种切实可行的模压-粉碎技术，用于氧化钙基吸附剂的放大造粒。在这两种技术中，首先对公斤级的铝促进氧化钙基吸附剂粉末进行模压，然后将其粉碎成目标尺寸的颗粒。为了优化造粒过程，采用了三种有机酸（醋酸、柠檬酸和丙二酸）作为酸化剂。结果，由于引入了适量的醋酸或丙二酸，合成吸附剂的抗损耗性能和抗压强度都得到了提高，因为醋酸或丙二酸可加速伪沸石（作为粘合剂）颗粒分解成溶胶颗粒，从而使吸附剂颗粒结合得更紧密。此外，玉米芯粉末还是一种孔隙形成剂，煅烧过程中有机基团热分解释放出的气体增强了吸附剂颗粒的多孔结构。然而，研究结果表明，多孔和疏松的结构对颗粒的机械强度产生了不利影响。
{"title":"Mass granulation of Al-promoted CaO-based sorbent via moulding-crushing methods for cyclic CO2 capture","authors":"","doi":"10.1016/j.ccst.2024.100321","DOIUrl":"10.1016/j.ccst.2024.100321","url":null,"abstract":"<div><div>Calcium looping (CaL) process, as an effective way to achieve CO<sub>2</sub> mitigation from high-temperature flue gas streams, is one of the most promising alternatives to amine scrubbing (a well-established technology for industrial post-combustion CO<sub>2</sub> capture). CaO sorbent is considered to be an ideal CO<sub>2</sub> adsorption material. Moreover, the development of granulation/pelletization techniques along with the mass preparation of the CaO-based sorbent is imperative for realistic large-scale applications. This work proposes two practicable moulding-crushing techniques for the scale-up granulation of CaO-based sorbents, in which the kilogram-scale produced Al-promoted CaO-based sorbent powders were first moulded and subsequently crushed into the granules of target sizes. Three types of organic acids–acetic acid, citric acid and malonic acid were employed as peptizing agents to optimize the granulation process. As a result, the anti-attrition properties and compressive strength of the synthetic sorbents were elevated owing to the introduction of an appropriate amount of acetic or malonic acid, for it expedited the disintegration of the pseudo-boehmite (served as binder agent) particles into sol particles, which allowed for tighter bonding of sorbent particles. In addition, corncob powder acted as a pore-forming agent, enhancing the porous structure of the sorbent particles due to the gases released from the thermal decomposition of organic groups during calcination. Nevertheless, the results revealed that the porous and loose structure adversely affected the mechanical strength of the granules.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-03DOI: 10.1016/j.ccst.2024.100290
Amine-based chemical absorption stands out as the leading technology for post-combustion CO2-capture. A blend of 3 M 2-amino-2-methyl-1-propanol (AMP) and 1.5 M piperazine (PZ), also known as CESAR1, has proven to outperform the current benchmark ethanolamine (MEA), exhibiting better energy performance and lower degradation rates. This review aims to gather all the experimental laboratory and pilot available data for CESAR1 and its constituent components. Experimental gaps to develop reliable process models are detected and future experiments are proposed. An overview of the knowledge related to amine and degradation compound emissions and environmental impacts of CESAR1, together with hands-on experience in operating the solvent, is presented in this review.
The main findings of the review are that sufficient physical properties, N2O-solubility, and speciation data for the CESAR1 solvent are not available in the open literature, even though necessary for the development of reliable process models. A review of the degradation compounds for AMP, PZ and AMP/PZ blends outlines that the nitrogen balance for AMP and PZ is not closed, meaning that there still are compounds that need identification and quantification in the degraded solvent. Given the higher volatility of AMP compared to MEA, a better understanding of the formation and behaviour of aerosol and gas phase emissions is required. A review of pilot plant campaigns for AMP/PZ blends shows that CESAR1 performs better in terms of energy compared to MEA and degrades less. There is, however, the need for high-quality pilot campaigns where all data needed for process model validation is provided for the scientific community. Finally, amine emission mitigation strategies and data on the environmental impact and toxicity of AMP and PZ are presented and discussed.
胺类化学吸收技术是燃烧后捕集二氧化碳的领先技术。事实证明，3 M 2-氨基-2-甲基-1-丙醇（AMP）和 1.5 M 哌嗪（PZ）的混合物（也称为 CESAR1）优于目前的基准乙醇胺（MEA），表现出更好的能量性能和更低的降解率。本综述旨在收集有关 CESAR1 及其组成成分的所有实验室和试验数据。发现了在开发可靠工艺模型方面存在的实验差距，并提出了未来的实验建议。本综述概述了与胺和降解化合物排放以及 CESAR1 对环境的影响有关的知识，并介绍了操作该溶剂的实践经验。综述的主要发现是，尽管对于开发可靠的工艺模型十分必要，但公开文献中并没有关于 CESAR1 溶剂的充分的物理性质、N2O 溶解性和规格数据。对 AMP、PZ 和 AMP/PZ 混合物的降解化合物进行审查后发现，AMP 和 PZ 的氮平衡尚未结束，这意味着降解溶剂中仍有一些化合物需要识别和定量。鉴于 AMP 与 MEA 相比具有更高的挥发性，因此需要更好地了解气溶胶和气相排放物的形成和行为。对 AMP/PZ 混合物试点工厂活动的审查表明，与 MEA 相比，CESAR1 的能量表现更好，降解也更少。不过，需要开展高质量的试验活动，为科学界提供工艺模型验证所需的所有数据。最后，介绍并讨论了胺排放缓解策略以及 AMP 和 PZ 对环境的影响和毒性数据。
{"title":"Available data and knowledge gaps of the CESAR1 solvent system","authors":"","doi":"10.1016/j.ccst.2024.100290","DOIUrl":"10.1016/j.ccst.2024.100290","url":null,"abstract":"<div><div>Amine-based chemical absorption stands out as the leading technology for post-combustion CO<sub>2</sub>-capture. A blend of 3 M 2-amino-2-methyl-1-propanol (AMP) and 1.5 M piperazine (PZ), also known as CESAR1, has proven to outperform the current benchmark ethanolamine (MEA), exhibiting better energy performance and lower degradation rates. This review aims to gather all the experimental laboratory and pilot available data for CESAR1 and its constituent components. Experimental gaps to develop reliable process models are detected and future experiments are proposed. An overview of the knowledge related to amine and degradation compound emissions and environmental impacts of CESAR1, together with hands-on experience in operating the solvent, is presented in this review.</div><div>The main findings of the review are that sufficient physical properties, N<sub>2</sub>O-solubility, and speciation data for the CESAR1 solvent are not available in the open literature, even though necessary for the development of reliable process models. A review of the degradation compounds for AMP, PZ and AMP/PZ blends outlines that the nitrogen balance for AMP and PZ is not closed, meaning that there still are compounds that need identification and quantification in the degraded solvent. Given the higher volatility of AMP compared to MEA, a better understanding of the formation and behaviour of aerosol and gas phase emissions is required. A review of pilot plant campaigns for AMP/PZ blends shows that CESAR1 performs better in terms of energy compared to MEA and degrades less. There is, however, the need for high-quality pilot campaigns where all data needed for process model validation is provided for the scientific community. Finally, amine emission mitigation strategies and data on the environmental impact and toxicity of AMP and PZ are presented and discussed.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-03DOI: 10.1016/j.ccst.2024.100315
Biochar is a porous, high-surface-area, black carbon-rich product that offers a cost-effective and environmentally friendly option to replace conventional charcoal. However, its specific structure and limited biodegradability pose challenges for its widespread applications. Photocatalysis is suggested as an alternative approach to harness solar energy and transform it into solar fuels. Interestingly, nanomaterials-based photocatalysts with tailored energy band properties and non-toxic characteristics, high surface areas, enhanced stability, and tunable pore sizes, have gained attention for their potential in diverse applications. Therefore, existing research on biochar-based photocatalysis systems (BBPs) aims to address different environmental issues. Interestingly, BBPs offer benefits such as excellent electrical conductivity, versatile functional groups, large surface area, and multiple surface-active sites, promoting high charge mobility, electron reservoir, superior charge separation, and small bandgap. This review provides a comprehensive overview of BBPs developments, including synthesis methods and properties. The fusion of BBPs is used in CO2 conversion, photocatalytic H2 generation, CO2 reduction, pollutants, dyes, and pharmaceutical degradation. Although the intermarriage of BBPs has potential benefits, their effectiveness may be compromised when modified photocatalysts are incorporated, which may negatively influence carrier generation efficiency and overall performance. Therefore, there is empty room for further research on their physical properties, effectiveness, long-term stability, and reusability of BBPs.
{"title":"Synergizing black gold and light: A comprehensive analysis of biochar-photocatalysis integration for green remediation","authors":"","doi":"10.1016/j.ccst.2024.100315","DOIUrl":"10.1016/j.ccst.2024.100315","url":null,"abstract":"<div><div>Biochar is a porous, high-surface-area, black carbon-rich product that offers a cost-effective and environmentally friendly option to replace conventional charcoal. However, its specific structure and limited biodegradability pose challenges for its widespread applications. Photocatalysis is suggested as an alternative approach to harness solar energy and transform it into solar fuels. Interestingly, nanomaterials-based photocatalysts with tailored energy band properties and non-toxic characteristics, high surface areas, enhanced stability, and tunable pore sizes, have gained attention for their potential in diverse applications. Therefore, existing research on biochar-based photocatalysis systems (BBPs) aims to address different environmental issues. Interestingly, BBPs offer benefits such as excellent electrical conductivity, versatile functional groups, large surface area, and multiple surface-active sites, promoting high charge mobility, electron reservoir, superior charge separation, and small bandgap. This review provides a comprehensive overview of BBPs developments, including synthesis methods and properties. The fusion of BBPs is used in CO<sub>2</sub> conversion, photocatalytic H<sub>2</sub> generation, CO<sub>2</sub> reduction, pollutants, dyes, and pharmaceutical degradation. Although the intermarriage of BBPs has potential benefits, their effectiveness may be compromised when modified photocatalysts are incorporated, which may negatively influence carrier generation efficiency and overall performance. Therefore, there is empty room for further research on their physical properties, effectiveness, long-term stability, and reusability of BBPs.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-03DOI: 10.1016/j.ccst.2024.100317
Carbon capture, utilization, and storage (CCUS), offers a promising avenue for mitigating CO2 emissions, in which the big challenge is the high CO2 capture cost. A novel CCUS technology called once-through CO2 chemical absorption using biogas slurry, could potentially reduce the CO2 capture cost through decreasing the energy consumption greatly during CO2 capture. This technology, however, is constrained by the CO2 absorption capacity of biogas slurry. To enhance the CO2 capture capacity of this innovative technology, we proposed a method to enhance CO2 absorption by integrating biochar into biogas slurry. Results indicated that the CO2 absorption capacity of biogas slurry improved by biochar varied with the type of biochar adopted. Among all the investigated biochar, the wood biochar like sea buckthorn and sand willow exhibited the lowest CO2 capture enhancement, with 0.82±0.19 mmol/g and 0.81±0.30 mmol/g, respectively. Biochar from C4 plants like corn stalks and cobs demonstrated the highest enhancement, with 2.11±0.24 mmol/g and 2.47±0.86 mmol/g, respectively. The enhancement driven by C3 plant biochar like millet stalks and shells was intermediate, with 1.62±0.47 mmol/g and 1.62±0.46 mmol/g, respectively. The primary factor for promoting CO2 absorption in the biochar-based biogas slurry was the increase in pH of biogas slurry. The total pore volume of biochar was the principal material property that enhanced CO2 absorption, followed by the EC and BET surface areas of biochar. Increasing the carbonization temperature of biochar could also enhance the CO2 absorption capacity by biogas slurry. In CO2-rich biochar-based biogas slurry, CO2 primarily existed as HCO3− and carbamate. However, for the influence of the biochar's pore structure, CO2 in the CO2-rich biochar-based biogas slurry was more stable than that in CO2-rich biogas slurry.
碳捕集、利用和封存（CCUS）为减少二氧化碳排放提供了一个前景广阔的途径，但其中最大的挑战是高昂的二氧化碳捕集成本。一种新型的 CCUS 技术，即利用沼气浆对二氧化碳进行一次性化学吸收，可以大大降低二氧化碳捕集过程中的能耗，从而有可能降低二氧化碳捕集成本。然而，这项技术受到沼气浆二氧化碳吸收能力的限制。为了提高这项创新技术的二氧化碳捕集能力，我们提出了一种通过在沼气浆中加入生物炭来提高二氧化碳吸收能力的方法。结果表明，生物炭提高的沼气浆对二氧化碳的吸收能力因所采用的生物炭类型而异。在所有研究的生物炭中，沙棘和沙柳等木质生物炭的二氧化碳捕集能力最低，分别为 0.82±0.19 mmol/g 和 0.81±0.30 mmol/g。来自 C4 植物（如玉米秆和玉米棒）的生物炭的二氧化碳捕集增强率最高，分别为 2.11±0.24 mmol/g 和 2.47±0.86 mmol/g。小米茎秆和外壳等 C3 植物生物炭的增强效果居中，分别为 1.62±0.47 mmol/g 和 1.62±0.46 mmol/g。促进生物炭基沼气浆吸收二氧化碳的主要因素是提高沼气浆的 pH 值。生物炭的总孔容积是促进二氧化碳吸收的主要材料特性，其次是生物炭的导电率和 BET 表面积。提高生物炭的碳化温度也能增强沼气浆对 CO2 的吸收能力。在富含 CO2 的生物炭沼气浆中，CO2 主要以 HCO3- 和氨基甲酸酯的形式存在。然而，受生物炭孔隙结构的影响，富含 CO2 的生物炭基沼气浆中的 CO2 比富含 CO2 的沼气浆中的 CO2 更稳定。
{"title":"CO2 absorption performance of biogas slurry enhanced by biochar as a potential solvent in once-through CO2 chemical absorption process","authors":"","doi":"10.1016/j.ccst.2024.100317","DOIUrl":"10.1016/j.ccst.2024.100317","url":null,"abstract":"<div><div>Carbon capture, utilization, and storage (CCUS), offers a promising avenue for mitigating CO<sub>2</sub> emissions, in which the big challenge is the high CO<sub>2</sub> capture cost. A novel CCUS technology called once-through CO<sub>2</sub> chemical absorption using biogas slurry, could potentially reduce the CO<sub>2</sub> capture cost through decreasing the energy consumption greatly during CO<sub>2</sub> capture. This technology, however, is constrained by the CO<sub>2</sub> absorption capacity of biogas slurry. To enhance the CO<sub>2</sub> capture capacity of this innovative technology, we proposed a method to enhance CO<sub>2</sub> absorption by integrating biochar into biogas slurry. Results indicated that the CO<sub>2</sub> absorption capacity of biogas slurry improved by biochar varied with the type of biochar adopted. Among all the investigated biochar, the wood biochar like sea buckthorn and sand willow exhibited the lowest CO<sub>2</sub> capture enhancement, with 0.82±0.19 mmol/g and 0.81±0.30 mmol/g, respectively. Biochar from C4 plants like corn stalks and cobs demonstrated the highest enhancement, with 2.11±0.24 mmol/g and 2.47±0.86 mmol/g, respectively. The enhancement driven by C3 plant biochar like millet stalks and shells was intermediate, with 1.62±0.47 mmol/g and 1.62±0.46 mmol/g, respectively. The primary factor for promoting CO<sub>2</sub> absorption in the biochar-based biogas slurry was the increase in pH of biogas slurry. The total pore volume of biochar was the principal material property that enhanced CO<sub>2</sub> absorption, followed by the EC and BET surface areas of biochar. Increasing the carbonization temperature of biochar could also enhance the CO<sub>2</sub> absorption capacity by biogas slurry. In CO<sub>2</sub>-rich biochar-based biogas slurry, CO<sub>2</sub> primarily existed as HCO<sub>3</sub><sup>−</sup> and carbamate. However, for the influence of the biochar's pore structure, CO<sub>2</sub> in the CO<sub>2</sub>-rich biochar-based biogas slurry was more stable than that in CO<sub>2</sub>-rich biogas slurry.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-30DOI: 10.1016/j.ccst.2024.100308
CO2 Electrochemical Reduction (CO2 ECR) is a promising technology that converts CO2 into value-added products, including formic acid, ethanol, and methanol, by applying external voltage. This technology is not only considered a CO2 mitigation process but a process that produces value-added chemicals reducing dependence on fossil fuels. This review assesses the sustainability of the CO2 ECR process by focusing on life cycle assessment and techno-economic evaluation studies. Recent advances in catalysts and cell structures for CO2 ECR are also discussed from a sustainability perspective. Furthermore, the integration of CO2 ECR with renewable resources as a power source is highlighted. The review aims to determine the sustainability of CO2 conversion for formic acid production and to provide guidelines for future advancements. Research gaps and challenges are also provided.
{"title":"CO2 electrochemical reduction to formic acid: An overview of process sustainability","authors":"","doi":"10.1016/j.ccst.2024.100308","DOIUrl":"10.1016/j.ccst.2024.100308","url":null,"abstract":"<div><div>CO<sub>2</sub> Electrochemical Reduction (CO<sub>2</sub> ECR) is a promising technology that converts CO<sub>2</sub> into value-added products, including formic acid, ethanol, and methanol, by applying external voltage. This technology is not only considered a CO<sub>2</sub> mitigation process but a process that produces value-added chemicals reducing dependence on fossil fuels. This review assesses the sustainability of the CO<sub>2</sub> ECR process by focusing on life cycle assessment and techno-economic evaluation studies. Recent advances in catalysts and cell structures for CO<sub>2</sub> ECR are also discussed from a sustainability perspective. Furthermore, the integration of CO<sub>2</sub> ECR with renewable resources as a power source is highlighted. The review aims to determine the sustainability of CO<sub>2</sub> conversion for formic acid production and to provide guidelines for future advancements. Research gaps and challenges are also provided.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-28DOI: 10.1016/j.ccst.2024.100312
This study explores the use of ionic liquids (ILs) as a novel and efficient alternative to conventional monoethanolamine (MEA) for CO2 capture. While MEA scrubbing is well-known for carbon sequestration, it faces limitations such as high energy consumption, toxicity, and rapid degradation. In contrast, ILs offer advantages such as non-volatility, stability, and reduced corrosiveness. We focus on a biodegradable IL comprising choline ([Cho]) and proline ([Pro]) amino acids to create an eco-friendly solution. Dimethyl sulfoxide (DMSO) is introduced as a diluent to mitigate viscosity issues during CO2 uptake. Our research measures the thermo-physical properties, including density and viscosity of [Cho][Pro] in DMSO at different concentrations. The addition of DMSO resulted in a viscosity reduction of >97 % at a temperature of 303 K for the three virgin solutions compared to the pure IL. In addition, the CO2 capture performance was evaluated using a system of absorption and desorption reactors. The results show that the 25 % wt [Cho][Pro] solution excels, achieving over 90 % CO2 absorption, 0.66 in the first cycle, and demonstrating high reusability and regeneration efficiency over multiple cycles. Comparisons indicate that the IL solution outperforms traditional aqueous MEA solutions. Longer term testing confirms the solution's stability and minimal degradation, achieving a regeneration efficiency of >55 % over 30 cycles, suggesting the potential of [Cho][Pro] for sustainable long-term CO2 capture applications.
本研究探讨了使用离子液体（IL）作为传统单乙醇胺（MEA）的新型高效替代品来捕获二氧化碳。众所周知，MEA 是一种用于碳封存的洗涤剂，但它面临着能耗高、毒性大和降解快等局限性。相比之下，IL 具有不挥发性、稳定性和腐蚀性低等优点。我们重点研究了一种由胆碱（[Cho]）和脯氨酸（[Pro]）氨基酸组成的可生物降解的 IL，以创造一种生态友好型解决方案。我们还引入了二甲基亚砜（DMSO）作为稀释剂，以缓解二氧化碳吸收过程中的粘度问题。我们的研究测量了不同浓度二甲基亚砜中[Cho][Pro]的热物理性质，包括密度和粘度。与纯 IL 相比，添加 DMSO 后，三种原始溶液在 303 K 温度下的粘度降低了 97%。此外，还使用吸收和解吸反应器系统对二氧化碳捕获性能进行了评估。结果表明，25% wt [Cho][Pro]溶液表现出色，二氧化碳吸收率超过 90%，在第一个循环中达到 0.66 molCO2/molIL，并在多个循环中表现出较高的重复利用率和再生效率。比较表明，IL 溶液优于传统的 MEA 水溶液。更长期的测试证实了溶液的稳定性和最小降解，在 30 个循环中实现了 55% 的再生效率，这表明 [Cho][Pro] 具有长期可持续二氧化碳捕获应用的潜力。
{"title":"Biobased ionic liquid solutions for an efficient post-combustion CO2 capture system","authors":"","doi":"10.1016/j.ccst.2024.100312","DOIUrl":"10.1016/j.ccst.2024.100312","url":null,"abstract":"<div><div>This study explores the use of ionic liquids (ILs) as a novel and efficient alternative to conventional monoethanolamine (MEA) for CO<sub>2</sub> capture. While MEA scrubbing is well-known for carbon sequestration, it faces limitations such as high energy consumption, toxicity, and rapid degradation. In contrast, ILs offer advantages such as non-volatility, stability, and reduced corrosiveness. We focus on a biodegradable IL comprising choline ([Cho]) and proline ([Pro]) amino acids to create an eco-friendly solution. Dimethyl sulfoxide (DMSO) is introduced as a diluent to mitigate viscosity issues during CO<sub>2</sub> uptake. Our research measures the thermo-physical properties, including density and viscosity of [Cho][Pro] in DMSO at different concentrations. The addition of DMSO resulted in a viscosity reduction of >97 % at a temperature of 303 K for the three virgin solutions compared to the pure IL. In addition, the CO<sub>2</sub> capture performance was evaluated using a system of absorption and desorption reactors. The results show that the 25 % wt [Cho][Pro] solution excels, achieving over 90 % CO<sub>2</sub> absorption, 0.66 <span><math><mrow><mi>m</mi><mi>o</mi><msub><mi>l</mi><mrow><mi>C</mi><msub><mi>O</mi><mn>2</mn></msub></mrow></msub><mo>/</mo><mi>m</mi><mi>o</mi><msub><mi>l</mi><mrow><mi>I</mi><mi>L</mi></mrow></msub></mrow></math></span> in the first cycle, and demonstrating high reusability and regeneration efficiency over multiple cycles. Comparisons indicate that the IL solution outperforms traditional aqueous MEA solutions. Longer term testing confirms the solution's stability and minimal degradation, achieving a regeneration efficiency of >55 % over 30 cycles, suggesting the potential of [Cho][Pro] for sustainable long-term CO<sub>2</sub> capture applications.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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