Pub Date : 2024-11-30DOI: 10.1016/j.ccst.2024.100327
Qinglin Du , Xiaoyu Zhang , Feng Wang , Wenqiang Liu
This study compares the CO2-assisted oxidative dehydrogenation of ethane (CO2-ODHE) performance of Mg-Al spinel catalysts doped with various metals (Cr, Fe, Co, Ga) that possess dehydrogenation activity. Both experimental and theoretical analyses were conducted to explore the reaction mechanism of CO2-ODHE on the spinel catalyst. The findings indicate that the MgFeAlO4 spinel catalyst exhibited CO2-ODHE activity at 600 °C, achieving a CO2 conversion rate of 20.3 %, an ethane conversion rate of 27.9 %, and an ethylene selectivity of 87.9 %. Mechanistic studies revealed that CO2 activation primarily occurs through the reverse water-gas shift reaction, and density functional theory calculations identified the doped metal ions as the principal active sites for ethane activation. These results suggest that CO2-ODHE on the spinel surface follows a mechanism of catalytic dehydrogenation coupled with the reverse water-gas shift reaction. Additionally, the effects of Fe doping contents and reaction temperature were investigated. When the ratio of Fe3+ to Al3+ was 1, corresponding to the MgFeAlO4 spinel catalyst, the CO2-ODHE performance was optimal, yielding 23.3 % ethylene. Increasing the reaction temperature enhanced ethane conversion but reduced ethylene selectivity, with both ethane conversion and ethylene selectivity reaching approximately 49 % at 700 °C.
{"title":"Oxidative dehydrogenation of ethane to ethylene with CO2 via Mg-Al spinel catalysts: Insight into dehydrogenation mechanism","authors":"Qinglin Du , Xiaoyu Zhang , Feng Wang , Wenqiang Liu","doi":"10.1016/j.ccst.2024.100327","DOIUrl":"10.1016/j.ccst.2024.100327","url":null,"abstract":"<div><div>This study compares the CO<sub>2</sub>-assisted oxidative dehydrogenation of ethane (CO<sub>2</sub>-ODHE) performance of Mg-Al spinel catalysts doped with various metals (Cr, Fe, Co, Ga) that possess dehydrogenation activity. Both experimental and theoretical analyses were conducted to explore the reaction mechanism of CO<sub>2</sub>-ODHE on the spinel catalyst. The findings indicate that the MgFeAlO<sub>4</sub> spinel catalyst exhibited CO<sub>2</sub>-ODHE activity at 600 °C, achieving a CO<sub>2</sub> conversion rate of 20.3 %, an ethane conversion rate of 27.9 %, and an ethylene selectivity of 87.9 %. Mechanistic studies revealed that CO<sub>2</sub> activation primarily occurs through the reverse water-gas shift reaction, and density functional theory calculations identified the doped metal ions as the principal active sites for ethane activation. These results suggest that CO<sub>2</sub>-ODHE on the spinel surface follows a mechanism of catalytic dehydrogenation coupled with the reverse water-gas shift reaction. Additionally, the effects of Fe doping contents and reaction temperature were investigated. When the ratio of Fe<sup>3+</sup> to Al<sup>3+</sup> was 1, corresponding to the MgFeAlO<sub>4</sub> spinel catalyst, the CO<sub>2</sub>-ODHE performance was optimal, yielding 23.3 % ethylene. Increasing the reaction temperature enhanced ethane conversion but reduced ethylene selectivity, with both ethane conversion and ethylene selectivity reaching approximately 49 % at 700 °C.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100327"},"PeriodicalIF":0.0,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744527","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 : 2024-11-22DOI: 10.1016/j.ccst.2024.100324
Niels-Ulrik Frigaard , Stefan Ernst Seemann
Methane (CH4) and carbon dioxide (CO2) are potent greenhouse gases produced as waste in carbon-based fuel processes. This study investigates the use of natural microbial communities to consume CH4 and CO2 and convert these gases into biomass. Seawater enriched with nutrients was exposed to a gas stream containing CH4 and CO2 under either light or dark conditions. The microbial communities that developed included methanotrophic bacteria consuming CH4 and cyanobacteria and microalgae consuming CO2. Chemotaxonomic markers showed that phototrophic growth increased significantly only in the light, with an early dominance by cyanobacteria later overtaken by microalgae, while methanotrophic growth increased significantly only in the dark. Near-full-length 16S and 18S rRNA gene sequencing using Nanopore technology revealed that the microbial diversity in the incubated cultures was significantly reduced compared to the natural communities in the seawater used as inoculum. The most abundant phototrophs in the light-incubated cultures were green algae from the genera Picochlorum, Tetraselmis, Chlamydomonas, and Nannochloris, and a few cyanobacterial genera mostly from Cyanobacteriales and Synechococcales (SILVA taxonomy). Methylomicrobium and Methylobacter were the most abundant methanotrophs in the dark-incubated cultures, whereas Methylomonas methanica was the only methanotroph with notable abundance under light conditions. Methanol-oxidizing Methylophaga were also highly abundant in dark-incubated cultures suggesting that these organisms were also important carbon-oxidizers in the CH4 consuming microbiomes. We conclude that optimal CH4 and CO2 consumption may require separating dark-dependent CH4 and light-dependent CO2 consuming microbiomes, or identifying symbiotic co-cultures of methanotrophs that are compatible with the light conditions needed by phototrophs. This research highlights potential microbial candidates for reducing the climate impact of flare gas and other waste gases containing CH4 and CO2.
甲烷（CH4）和二氧化碳（CO2）是碳基燃料加工过程中作为废物产生的强效温室气体。本研究调查了利用天然微生物群落消耗 CH4 和 CO2 并将这些气体转化为生物质的情况。在光照或黑暗条件下，将富含营养物质的海水暴露在含有甲烷和二氧化碳的气流中。形成的微生物群落包括消耗 CH4 的甲烷营养细菌以及消耗 CO2 的蓝藻和微藻。化学分类标记显示，光营养生长只在光照条件下显著增加，早期以蓝藻为主，后来被微藻取代；而甲烷营养生长只在黑暗条件下显著增加。利用 Nanopore 技术进行的近全长 16S 和 18S rRNA 基因测序显示，与用作接种物的海水中的自然群落相比，培养物中的微生物多样性明显减少。光照培养物中最丰富的光营养体是 Picochlorum 属、Tetraselmis 属、Chlamydomonas 属和 Nannochloris 属的绿藻，以及一些蓝藻属，主要来自 Cyanobacteriales 和 Synechococcales（SILVA 分类法）。在黑暗培养条件下，甲烷微生物和甲烷杆菌的数量最多，而甲烷氧单胞菌是唯一在光照条件下数量显著增加的甲烷微生物。甲醇氧化型嗜甲氧单胞菌（Methylophaga）在黑暗培养条件下的含量也很高，这表明这些生物也是消耗 CH4 的微生物群中重要的碳氧化剂。我们的结论是，要达到最佳的 CH4 和 CO2 消耗效果，可能需要将依赖黑暗的 CH4 和依赖光照的 CO2 消耗微生物群分离开来，或者找出与光养微生物所需的光照条件相适应的甲烷营养体共生共培养物。这项研究强调了潜在的候选微生物，它们可以减少火炬气和其他含有甲烷和二氧化碳的废气对气候的影响。
{"title":"Methane and CO2 consumption from a synthetic waste gas by microbial communities in enriched seawater","authors":"Niels-Ulrik Frigaard , Stefan Ernst Seemann","doi":"10.1016/j.ccst.2024.100324","DOIUrl":"10.1016/j.ccst.2024.100324","url":null,"abstract":"<div><div>Methane (CH<sub>4</sub>) and carbon dioxide (CO<sub>2</sub>) are potent greenhouse gases produced as waste in carbon-based fuel processes. This study investigates the use of natural microbial communities to consume CH<sub>4</sub> and CO<sub>2</sub> and convert these gases into biomass. Seawater enriched with nutrients was exposed to a gas stream containing CH<sub>4</sub> and CO<sub>2</sub> under either light or dark conditions. The microbial communities that developed included methanotrophic bacteria consuming CH<sub>4</sub> and cyanobacteria and microalgae consuming CO<sub>2</sub>. Chemotaxonomic markers showed that phototrophic growth increased significantly only in the light, with an early dominance by cyanobacteria later overtaken by microalgae, while methanotrophic growth increased significantly only in the dark. Near-full-length 16S and 18S rRNA gene sequencing using Nanopore technology revealed that the microbial diversity in the incubated cultures was significantly reduced compared to the natural communities in the seawater used as inoculum. The most abundant phototrophs in the light-incubated cultures were green algae from the genera <em>Picochlorum, Tetraselmis, Chlamydomonas</em>, and <em>Nannochloris</em>, and a few cyanobacterial genera mostly from Cyanobacteriales and Synechococcales (SILVA taxonomy). <em>Methylomicrobium</em> and <em>Methylobacter</em> were the most abundant methanotrophs in the dark-incubated cultures, whereas <em>Methylomonas methanica</em> was the only methanotroph with notable abundance under light conditions. Methanol-oxidizing <em>Methylophaga</em> were also highly abundant in dark-incubated cultures suggesting that these organisms were also important carbon-oxidizers in the CH<sub>4</sub> consuming microbiomes. We conclude that optimal CH<sub>4</sub> and CO<sub>2</sub> consumption may require separating dark-dependent CH<sub>4</sub> and light-dependent CO<sub>2</sub> consuming microbiomes, or identifying symbiotic co-cultures of methanotrophs that are compatible with the light conditions needed by phototrophs. This research highlights potential microbial candidates for reducing the climate impact of flare gas and other waste gases containing CH<sub>4</sub> and CO<sub>2</sub>.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100324"},"PeriodicalIF":0.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697143","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 : 2024-11-22DOI: 10.1016/j.ccst.2024.100328
Zhuozhen Gan , Qingyang Shao , Bingyao Ge , Qiang Wang , Xuancan Zhu
Development of amine-functionalised CO2 adsorbents for negative emissions is a popular research topic in the field of direct air capture (DAC). While most studies aim to improve the adsorption capacities of DAC adsorbents, it is imperative to accurately model the DAC process to understand its roles and reduce operating costs. To this end, a comprehensive understanding and systematic modelling of the adsorption behaviour of amine-functionalised materials is essential. This includes examining the effect of H2O on CO2 adsorption under air conditions and desorption by steam purging. In this study, a fundamental analysis of single-component and binary H2O and CO2 adsorption by amine-functionalised Mg-Al mixed metal oxides (MMOs) was performed. Single-component H2O and CO2 adsorption experimental data were obtained using Guggenheim Anderson De Boer and modified Sips models, respectively. To fit the CO2 uptake at different temperatures (25–75 °C), CO2 isotherm models take into account both thermodynamic and diffusive factors. Subsequently, a novel mechanistic H2O and CO2 co-adsorption isotherm model is developed and calibrated with the breakthrough experiments. The mechanistic co-adsorption isotherm model captured the improvement in the equilibrium CO2 capacity in the presence of H2O. Moreover, the co-adsorption model considers the synergistic effects of H2O and heat. Overall, the proposed isotherm models are expected to be useful in modelling DAC processes based on novel amine-functionalised adsorbents under complex conditions and ultimately guiding DAC process design and optimisation.
开发用于负排放的胺功能化二氧化碳吸附剂是直接空气捕集（DAC）领域的一个热门研究课题。虽然大多数研究旨在提高 DAC 吸附剂的吸附能力，但当务之急是对 DAC 过程进行精确建模，以了解其作用并降低运营成本。为此，对胺功能化材料的吸附行为进行全面了解和系统建模至关重要。这包括研究 H2O 在空气条件下对二氧化碳吸附以及通过蒸汽吹扫脱附的影响。本研究对胺功能化镁铝混合金属氧化物（MMOs）对单组分和二元 H2O 和 CO2 的吸附进行了基本分析。利用古根海姆-安德森-德布尔模型和改进的西普斯模型分别获得了单组分 H2O 和 CO2 吸附实验数据。为了拟合不同温度（25-75 °C）下的二氧化碳吸收情况，二氧化碳等温线模型考虑了热力学和扩散因素。随后，建立了一个新的 H2O 和 CO2 机械共吸附等温线模型，并用突破实验进行了校准。机理共吸附等温线模型捕捉到了 H2O 存在时二氧化碳平衡容量的提高。此外，共吸附模型还考虑了 H2O 和热量的协同效应。总之，所提出的等温线模型有望用于模拟复杂条件下基于新型胺功能化吸附剂的 DAC 过程，并最终指导 DAC 过程的设计和优化。
{"title":"Single-component and binary H2O and CO2 co-adsorption isotherm model on amine-functionalised Mg-Al mixed metal oxides","authors":"Zhuozhen Gan , Qingyang Shao , Bingyao Ge , Qiang Wang , Xuancan Zhu","doi":"10.1016/j.ccst.2024.100328","DOIUrl":"10.1016/j.ccst.2024.100328","url":null,"abstract":"<div><div>Development of amine-functionalised CO<sub>2</sub> adsorbents for negative emissions is a popular research topic in the field of direct air capture (DAC). While most studies aim to improve the adsorption capacities of DAC adsorbents, it is imperative to accurately model the DAC process to understand its roles and reduce operating costs. To this end, a comprehensive understanding and systematic modelling of the adsorption behaviour of amine-functionalised materials is essential. This includes examining the effect of H<sub>2</sub>O on CO<sub>2</sub> adsorption under air conditions and desorption by steam purging. In this study, a fundamental analysis of single-component and binary H<sub>2</sub>O and CO<sub>2</sub> adsorption by amine-functionalised Mg-Al mixed metal oxides (MMOs) was performed. Single-component H<sub>2</sub>O and CO<sub>2</sub> adsorption experimental data were obtained using Guggenheim Anderson De Boer and modified Sips models, respectively. To fit the CO<sub>2</sub> uptake at different temperatures (25–75 °C), CO<sub>2</sub> isotherm models take into account both thermodynamic and diffusive factors. Subsequently, a novel mechanistic H<sub>2</sub>O and CO<sub>2</sub> co-adsorption isotherm model is developed and calibrated with the breakthrough experiments. The mechanistic co-adsorption isotherm model captured the improvement in the equilibrium CO<sub>2</sub> capacity in the presence of H<sub>2</sub>O. Moreover, the co-adsorption model considers the synergistic effects of H<sub>2</sub>O and heat. Overall, the proposed isotherm models are expected to be useful in modelling DAC processes based on novel amine-functionalised adsorbents under complex conditions and ultimately guiding DAC process design and optimisation.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100328"},"PeriodicalIF":0.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697772","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 : 2024-11-22DOI: 10.1016/j.ccst.2024.100304
Yuhang Liu , Yihe Miao , Lun Wang , Xilin Gu , Zhaoyang Li , Shigenori Fujikawa , Lijun Yu
Direct air capture (DAC) is one of the principal negative emission technologies for addressing climate change, but its deployment is hindered by the high cost and substantial energy consumption. Only being powered by low-cost renewable energy, DAC can maximize its negative emission potential, in return, DAC can help the decarbonization of the power sector. Due to the intermittency of renewable energy, effectively integrating renewable energy with DAC currently remains a significant challenge. To address this research gap, this study focuses on exploring flexible operation strategies of the adsorbent based DAC system, coupling them with an actual photovoltaic (PV) power station, and making DAC systems participate in minute-level dispatch. The adsorbent based DAC system adopts a modular design, allowing each unit to operate as an independent load, not requiring continuous operation and enabling interruption between cycles or processes. Additionally, the adsorption process is curtailable and extendable to dynamically adjust the time of activating desorption. The flexible operational combination allows the DAC to better match the fluctuation of PV. Based on actual data and time-of-use pricing, this paper conducts a comparative techno-economic analysis of DAC and battery energy storage (BES) systems. The results indicate that deploying flexible DAC is the most cost-effective among different given scenarios. Deploying 46,800 DAC units primarily powered by solar curtailment can achieve the lowest cost of $30,000/MW-year for the selected 1000 MW PV power station, along with an 80 % curtailment consumption rate and annual 634,000 tons CO2 captured. Before 2030, coupling DAC with PV can effectively address the curtailment issues and assist with peak shaving. As carbon prices gradually rise and adsorbent costs decrease, by 2040, DAC will release its negative emission potential, playing a crucial role in achieving net zero or even negative carbon emissions.
{"title":"Addressing solar power curtailment by integrating flexible direct air capture","authors":"Yuhang Liu , Yihe Miao , Lun Wang , Xilin Gu , Zhaoyang Li , Shigenori Fujikawa , Lijun Yu","doi":"10.1016/j.ccst.2024.100304","DOIUrl":"10.1016/j.ccst.2024.100304","url":null,"abstract":"<div><div>Direct air capture (DAC) is one of the principal negative emission technologies for addressing climate change, but its deployment is hindered by the high cost and substantial energy consumption. Only being powered by low-cost renewable energy, DAC can maximize its negative emission potential, in return, DAC can help the decarbonization of the power sector. Due to the intermittency of renewable energy, effectively integrating renewable energy with DAC currently remains a significant challenge. To address this research gap, this study focuses on exploring flexible operation strategies of the adsorbent based DAC system, coupling them with an actual photovoltaic (PV) power station, and making DAC systems participate in minute-level dispatch. The adsorbent based DAC system adopts a modular design, allowing each unit to operate as an independent load, not requiring continuous operation and enabling interruption between cycles or processes. Additionally, the adsorption process is curtailable and extendable to dynamically adjust the time of activating desorption. The flexible operational combination allows the DAC to better match the fluctuation of PV. Based on actual data and time-of-use pricing, this paper conducts a comparative techno-economic analysis of DAC and battery energy storage (BES) systems. The results indicate that deploying flexible DAC is the most cost-effective among different given scenarios. Deploying 46,800 DAC units primarily powered by solar curtailment can achieve the lowest cost of $30,000/MW-year for the selected 1000 MW PV power station, along with an 80 % curtailment consumption rate and annual 634,000 tons CO<sub>2</sub> captured. Before 2030, coupling DAC with PV can effectively address the curtailment issues and assist with peak shaving. As carbon prices gradually rise and adsorbent costs decrease, by 2040, DAC will release its negative emission potential, playing a crucial role in achieving net zero or even negative carbon emissions.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100304"},"PeriodicalIF":0.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697771","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}
Modern concrete offers a significant potential for carbon capture, utilization and storage due to their alkaline nature. Herein, we combine the CO2 mineralization in the waste cement paste (WCP) with calcined clay cement to develop a novel low-carbon cement—carbonated waste paste calcined clay cement (CWPC3). Our results suggest that 1 kg WCP efficiently mineralizes ∼0.27 kg CO2 within 2 h, and together produces amorphous silica-alumina gel. This carbonated WCP promotes early hydration and strength development due to its high pozzolanic reactivity. Compared with conventional limestone calcined clay cement (LC3), CWPC3 has higher early strength and lower embodied carbon. Our work provides a synchronized solution to treat WCP while reducing embodied carbon in construction materials.
{"title":"Carbonated waste paste calcined clay cement with enhanced CO2 mineralization and early strength","authors":"Qing Liu, Yu Yan, Yuchen Hu, Qiang You, Guoqing Geng","doi":"10.1016/j.ccst.2024.100343","DOIUrl":"10.1016/j.ccst.2024.100343","url":null,"abstract":"<div><div>Modern concrete offers a significant potential for carbon capture, utilization and storage due to their alkaline nature. Herein, we combine the CO<sub>2</sub> mineralization in the waste cement paste (WCP) with calcined clay cement to develop a novel low-carbon cement—carbonated waste paste calcined clay cement (CWPC<sup>3</sup>). Our results suggest that 1 kg WCP efficiently mineralizes ∼0.27 kg CO<sub>2</sub> within 2 h, and together produces amorphous silica-alumina gel. This carbonated WCP promotes early hydration and strength development due to its high pozzolanic reactivity. Compared with conventional limestone calcined clay cement (LC<sup>3</sup>), CWPC<sup>3</sup> has higher early strength and lower embodied carbon. Our work provides a synchronized solution to treat WCP while reducing embodied carbon in construction materials.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100343"},"PeriodicalIF":0.0,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697773","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 : 2024-11-19DOI: 10.1016/j.ccst.2024.100342
Shou-Feng Chang , Hsuan-Han Chiu , Han-Shu Jao , Jin Shang , Yu-Jeng Lin , Bor-Yih Yu
The comprehensive evaluation of various CO2 capture technologies from multiple perspectives remains limited, yet it is crucial for the successful implementation and deployment of carbon capture solutions to achieve carbon neutrality. This study presents a framework for assessing representative CO2 capture processes from key point sources through rigorous simulation. Eight scenarios were developed and compared, comprising four standalone processes (i.e., physical absorption (PHYABS), chemical absorption (CHEABS), dual-reflux pressure swing adsorption (DRPSA) and pressure-temperature swing adsorption (PTSA)) and four hybrid processes that integrate different adsorption and absorption processes. To evaluate each scenario, an integrated indicator, the Economics, Equipment footprint, and Environmental Score (EEES), was introduced. Our results indicate that the standalone CHEABS exhibits the lowest EEES of 0.120, highlighting its technological readiness and superiority over other processes. In contrast, the standalone PHYABS (EEES=0.168) and the hybrid PHYABS/PTSA process (EEES=0.242) emerge as viable alternatives, balancing environmental performance with economic and spatial considerations. Standalone PTSA (EEES=0.465) and DRPSA (EEES=0.706) are less favorable because of their higher utility demands and larger equipment footprints. Similarly, hybrid processes, namely, DRPSA/CHEABS (EEES=0.891), CHEABS/PTSA (EEES=0.837), and DRPSA/PHYABS (EEES=0.784), are less advantageous across all three metrics. Furthermore, sensitivity analyses indicated that carbon permit prices exert a negligible effect on the process economics. Additionally, it appears that government subsidies may play a crucial role in facilitating the development of CO2 capture technologies within the industrial sector. Overall, this study provides a robust framework for evaluating CO2 capture processes and offers practical recommendations for technology deployment.
{"title":"Comprehensive evaluation of various CO2 capture technologies through rigorous simulation: Economic, equipment footprint, and environmental analysis","authors":"Shou-Feng Chang , Hsuan-Han Chiu , Han-Shu Jao , Jin Shang , Yu-Jeng Lin , Bor-Yih Yu","doi":"10.1016/j.ccst.2024.100342","DOIUrl":"10.1016/j.ccst.2024.100342","url":null,"abstract":"<div><div>The comprehensive evaluation of various CO<sub>2</sub> capture technologies from multiple perspectives remains limited, yet it is crucial for the successful implementation and deployment of carbon capture solutions to achieve carbon neutrality. This study presents a framework for assessing representative CO<sub>2</sub> capture processes from key point sources through rigorous simulation. Eight scenarios were developed and compared, comprising four standalone processes (<em>i.e.</em>, physical absorption (PHYABS), chemical absorption (CHEABS), dual-reflux pressure swing adsorption (DRPSA) and pressure-temperature swing adsorption (PTSA)) and four hybrid processes that integrate different adsorption and absorption processes. To evaluate each scenario, an integrated indicator, the Economics, Equipment footprint, and Environmental Score (EEES), was introduced. Our results indicate that the standalone CHEABS exhibits the lowest EEES of 0.120, highlighting its technological readiness and superiority over other processes. In contrast, the standalone PHYABS (EEES=0.168) and the hybrid PHYABS/PTSA process (EEES=0.242) emerge as viable alternatives, balancing environmental performance with economic and spatial considerations. Standalone PTSA (EEES=0.465) and DRPSA (EEES=0.706) are less favorable because of their higher utility demands and larger equipment footprints. Similarly, hybrid processes, namely, DRPSA/CHEABS (EEES=0.891), CHEABS/PTSA (EEES=0.837), and DRPSA/PHYABS (EEES=0.784), are less advantageous across all three metrics. Furthermore, sensitivity analyses indicated that carbon permit prices exert a negligible effect on the process economics. Additionally, it appears that government subsidies may play a crucial role in facilitating the development of CO<sub>2</sub> capture technologies within the industrial sector. Overall, this study provides a robust framework for evaluating CO<sub>2</sub> capture processes and offers practical recommendations for technology deployment.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100342"},"PeriodicalIF":0.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744526","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 : 2024-11-17DOI: 10.1016/j.ccst.2024.100340
Bruktawit M. Ahmed , Mahelet G. Fikru
Utilizing a discrete choice experiment with 250 US electricity consumers, this study estimates willingness to pay (WTP) for each percentage increase in carbon dioxide captured and the preferred carbon management technique—permanent storage or industrial utilization. Results from an alternative-specific conditional logit model suggest a WTP of $0.13 for each percent increase in carbon capture, and an additional $5-$6 per month for industrial utilization over storage. In contrast, the estimated WTP for each percent increase in renewable energy is $0.25, suggesting that consumers value renewable energy nearly twice as much as carbon capture. These preliminary results indicate some preference for carbon capture, though not as strong as for cleaner energy, with a clearer preference for carbon utilization than storage. Further research is recommended to investigate variations in these preferences based on individual characteristics.
{"title":"Willingness to pay estimates for carbon capture and management: Evidence from a pilot choice experiment","authors":"Bruktawit M. Ahmed , Mahelet G. Fikru","doi":"10.1016/j.ccst.2024.100340","DOIUrl":"10.1016/j.ccst.2024.100340","url":null,"abstract":"<div><div>Utilizing a discrete choice experiment with 250 US electricity consumers, this study estimates willingness to pay (WTP) for each percentage increase in carbon dioxide captured and the preferred carbon management technique—permanent storage or industrial utilization. Results from an alternative-specific conditional logit model suggest a WTP of $0.13 for each percent increase in carbon capture, and an additional $5-$6 per month for industrial utilization over storage. In contrast, the estimated WTP for each percent increase in renewable energy is $0.25, suggesting that consumers value renewable energy nearly twice as much as carbon capture. These preliminary results indicate some preference for carbon capture, though not as strong as for cleaner energy, with a clearer preference for carbon utilization than storage. Further research is recommended to investigate variations in these preferences based on individual characteristics.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100340"},"PeriodicalIF":0.0,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697777","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 : 2024-11-14DOI: 10.1016/j.ccst.2024.100318
W. Rahmah , K. Khoiruddin , I.G. Wenten , S. Kawi
This paper presents an innovative approach to carbon capture using bio-inspired membrane materials, addressing the urgent need to combat climate change and reduce atmospheric CO2 levels. Traditional carbon capture technologies face limitations such as high operational costs and limited efficiency. In contrast, bio-inspired membranes, drawing from the efficiency and specificity of natural systems, offer higher CO2 selectivity, reduced energy requirements, and increased sustainability. The paper explores the design principles and carbon capture mechanisms of bio-inspired membranes, highlighting significant advancements in material synthesis and structure. Key strategies include extreme wettability, facilitated transport mechanisms, and the use of porins and nanochannels. The integration of artificial photosynthesis and enzyme technologies into membrane systems is also examined. Innovations in material synthesis and composite development are showcased, demonstrating enhanced CO2 separation across various industrial applications. Despite these promising attributes, bio-inspired membranes face significant challenges such as loss of mobile carriers, inadequate compatibility between polymeric matrices and facilitating agents, and difficulties in scaling up due to complex fabrication processes. These challenges underscore the need for continued research to optimize membrane design and functionality, ensuring their viability for large-scale implementation. The paper underscores the transformative potential of bio-inspired membrane materials in advancing carbon capture technologies, aligning with global efforts to mitigate climate change and achieve sustainable development goals.
{"title":"Advancing carbon capture with bio-inspired membrane materials: A review","authors":"W. Rahmah , K. Khoiruddin , I.G. Wenten , S. Kawi","doi":"10.1016/j.ccst.2024.100318","DOIUrl":"10.1016/j.ccst.2024.100318","url":null,"abstract":"<div><div>This paper presents an innovative approach to carbon capture using bio-inspired membrane materials, addressing the urgent need to combat climate change and reduce atmospheric CO<sub>2</sub> levels. Traditional carbon capture technologies face limitations such as high operational costs and limited efficiency. In contrast, bio-inspired membranes, drawing from the efficiency and specificity of natural systems, offer higher CO<sub>2</sub> selectivity, reduced energy requirements, and increased sustainability. The paper explores the design principles and carbon capture mechanisms of bio-inspired membranes, highlighting significant advancements in material synthesis and structure. Key strategies include extreme wettability, facilitated transport mechanisms, and the use of porins and nanochannels. The integration of artificial photosynthesis and enzyme technologies into membrane systems is also examined. Innovations in material synthesis and composite development are showcased, demonstrating enhanced CO<sub>2</sub> separation across various industrial applications. Despite these promising attributes, bio-inspired membranes face significant challenges such as loss of mobile carriers, inadequate compatibility between polymeric matrices and facilitating agents, and difficulties in scaling up due to complex fabrication processes. These challenges underscore the need for continued research to optimize membrane design and functionality, ensuring their viability for large-scale implementation. The paper underscores the transformative potential of bio-inspired membrane materials in advancing carbon capture technologies, aligning with global efforts to mitigate climate change and achieve sustainable development goals.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"13 ","pages":"Article 100318"},"PeriodicalIF":0.0,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660291","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 : 2024-11-12DOI: 10.1016/j.ccst.2024.100336
Ahmad Salam Farooqi , Abdelwahab N. Allam , Muhammad Zubair Shahid , Anas Aqil , Kevin Fajri , Sunhwa Park , Omar Y. Abdelaziz , Mahmoud M. Abdelnaby , Mohammad M. Hossain , Mohamed A. Habib , Syed Muhammad Wajahat ul Hasnain , Ali Nabavi , Mingming Zhu , Vasilije Manovic , Medhat A. Nemitallah
The sorption-enhanced steam methane reforming (SE-SMR) process, which integrates methane steam reforming with in situ CO2 capture, represents a breakthrough technology for clean hydrogen production. This comprehensive review thoroughly explores the SE-SMR process, highlighting its ability to efficiently combine carbon capture with hydrogen generation. The review evaluates the mechanisms of SE-SMR and evaluates a range of innovative sorbent materials, such as CaO-based, alkali-ceramic, hydrotalcite, and waste-derived sorbents. The role of catalysts in enhancing hydrogen production within SE-SMR processes is also discussed, with a focus on bi-functional materials. In addition to examining reaction kinetics and advanced process configurations, this review touches on the techno-economic aspects of SE-SMR. While the analysis does not provide an in-depth economic evaluation, key factors such as potential capital costs (CAPEX), operational expenses (OPEX), and scalability are considered. The review outlines the potential of SE-SMR to offer more efficient hydrogen production, with the added benefit of in situ carbon capture simplifying the process design. Although a detailed economic comparison with other hydrogen production technologies was not the focus, this review emphasizes SE-SMR's promise as a scalable and flexible solution for clean energy. With its integrated design, SE-SMR offers pathways to industrial-scale hydrogen production. This review serves as a valuable resource for researchers, policymakers, and industry experts committed to advancing sustainable and efficient hydrogen production technologies.
{"title":"Advancements in sorption-enhanced steam reforming for clean hydrogen production: A comprehensive review","authors":"Ahmad Salam Farooqi , Abdelwahab N. Allam , Muhammad Zubair Shahid , Anas Aqil , Kevin Fajri , Sunhwa Park , Omar Y. Abdelaziz , Mahmoud M. Abdelnaby , Mohammad M. Hossain , Mohamed A. Habib , Syed Muhammad Wajahat ul Hasnain , Ali Nabavi , Mingming Zhu , Vasilije Manovic , Medhat A. Nemitallah","doi":"10.1016/j.ccst.2024.100336","DOIUrl":"10.1016/j.ccst.2024.100336","url":null,"abstract":"<div><div>The sorption-enhanced steam methane reforming (SE-SMR) process, which integrates methane steam reforming with in situ CO<sub>2</sub> capture, represents a breakthrough technology for clean hydrogen production. This comprehensive review thoroughly explores the SE-SMR process, highlighting its ability to efficiently combine carbon capture with hydrogen generation. The review evaluates the mechanisms of SE-SMR and evaluates a range of innovative sorbent materials, such as CaO-based, alkali-ceramic, hydrotalcite, and waste-derived sorbents. The role of catalysts in enhancing hydrogen production within SE-SMR processes is also discussed, with a focus on bi-functional materials. In addition to examining reaction kinetics and advanced process configurations, this review touches on the techno-economic aspects of SE-SMR. While the analysis does not provide an in-depth economic evaluation, key factors such as potential capital costs (CAPEX), operational expenses (OPEX), and scalability are considered. The review outlines the potential of SE-SMR to offer more efficient hydrogen production, with the added benefit of in situ carbon capture simplifying the process design. Although a detailed economic comparison with other hydrogen production technologies was not the focus, this review emphasizes SE-SMR's promise as a scalable and flexible solution for clean energy. With its integrated design, SE-SMR offers pathways to industrial-scale hydrogen production. This review serves as a valuable resource for researchers, policymakers, and industry experts committed to advancing sustainable and efficient hydrogen production technologies.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100336"},"PeriodicalIF":0.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697778","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 : 2024-11-09DOI: 10.1016/j.ccst.2024.100337
Bablu Alawa, Sankar Chakma
The single-use waste plastics is one of the major concerns globally to society as well as to the scientific community. It is even more so at the present-day due to the rapid production of plastic and polymeric materials to meet the societal demand. The consumers’ demand and dependency on plastic is huge due to its versatility, low production cost, light weight and numerous applications of it. With increasing the demand, waste plastic generation is also high that leads to creation of environmental and health problems like vomiting, anemia, headache, kidney, liver damage, cancer, shortened lifespan and chronic damage to nervous system. Therefore, new and modern techniques such as pyrolysis has been developed to reduce the environmental pollution and cutting of carbon tracers of plastic products by reducing the emissions of oxides of carbon like monoxide (CO) and carbon dioxide (CO2) as compared to other technologies. This review paper mainly focused on the plastic waste generation scenario in India and minimization technique to produce fuels. Additionally, other new technologies to handle waste plastic along with energy generation (in the form of oil and gas production) with the specific process parameters (reaction time, reactor type, catalyst type and reaction temperature) to obtain the maximum yield are also discussed. The technoeconomic analysis and energy participation of waste plastic oil has also been highlighted to enhance the utilization of pyrolysis products and their futuristic application as an automotive fuel. An attempt was also made to analyze the emissions reduction as well as promotion of circular economy.
{"title":"A review on feasibility and techno-economic analysis of hydrocarbon liquid fuels production via catalytic pyrolysis of waste plastic materials","authors":"Bablu Alawa, Sankar Chakma","doi":"10.1016/j.ccst.2024.100337","DOIUrl":"10.1016/j.ccst.2024.100337","url":null,"abstract":"<div><div>The single-use waste plastics is one of the major concerns globally to society as well as to the scientific community. It is even more so at the present-day due to the rapid production of plastic and polymeric materials to meet the societal demand. The consumers’ demand and dependency on plastic is huge due to its versatility, low production cost, light weight and numerous applications of it. With increasing the demand, waste plastic generation is also high that leads to creation of environmental and health problems like vomiting, anemia, headache, kidney, liver damage, cancer, shortened lifespan and chronic damage to nervous system. Therefore, new and modern techniques such as pyrolysis has been developed to reduce the environmental pollution and cutting of carbon tracers of plastic products by reducing the emissions of oxides of carbon like monoxide (CO) and carbon dioxide (CO<sub>2</sub>) as compared to other technologies. This review paper mainly focused on the plastic waste generation scenario in India and minimization technique to produce fuels. Additionally, other new technologies to handle waste plastic along with energy generation (in the form of oil and gas production) with the specific process parameters (reaction time, reactor type, catalyst type and reaction temperature) to obtain the maximum yield are also discussed. The technoeconomic analysis and energy participation of waste plastic oil has also been highlighted to enhance the utilization of pyrolysis products and their futuristic application as an automotive fuel. An attempt was also made to analyze the emissions reduction as well as promotion of circular economy.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100337"},"PeriodicalIF":0.0,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697769","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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