Carbon Capture Science & Technology最新文献_第3页

Analysis of new strategies integrating bipolar membrane electrodialysis and absorption systems in DAC applications 双极膜电渗析和吸收系统在DAC应用中的新策略分析

Carbon Capture Science & Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-28 DOI: 10.1016/j.ccst.2026.100579

Grazia Leonzio , Lei Xing , Nilay Shah

Solvent-based carbon dioxide capture technologies remain among the most promising capture strategies but conventional thermal regeneration methods are hindered by significant drawbacks. In this context, electrochemical regeneration, particularly through the bipolar membrane electrodialysis, offers potential advantages. However, its application is challenged by carbon dioxide bubble formation in the acid compartment, which increases energy requirements. To address this issue, a novel process is proposed in which carbonates in the rich solvent react with weak organic acids to release carbon dioxide while forming acid salts treated in the electrodialysis unit, enabling simultaneous the regeneration of both acid and solvent. To date, comprehensive economic and environmental assessments of such approaches are lacking in the state-of-the-art. This study aims to fill that gap by simulating both the conventional process and alternative pathways based on formic acid and a formic/acetic acid mixtures. Comprehensive material and energy balances are established, alongside detailed evaluations of capital and operating expenditures, and the environmental impact are conducted through life cycle assessment implemented in OpenLCA. Although the alternative processes exhibit higher energy consumption (2314 kWh/tonCO₂ vs 1907 kWh/tonCO₂ with formic acid, and 1943 kWh/tonCO₂ with the acid mixture), the conventional route remains more favorable in terms of both overall cost and environmental impact. Specifically, the total cost and climate change impact of the conventional capture process are estimated to be 480 $/tonCO₂ and –0.9593 kgCO₂_eq/kgCO₂, respectively. On the other hand, the alternative process using formic acid and the mixture acid incur higher costs of 510 $/tonCO₂ and 519 $/tonCO₂ with corresponding environmental impacts of -0.9378 kgCO_2eq/kgCO₂ and 0.9238 kgCO_2eq/kgCO₂, respectively. Further optimization of the conventional process, particularly in mitigating carbon dioxide bubble formation, appears essential to fully exploit its economic and environmental potential.

溶剂型二氧化碳捕集技术仍然是最有前途的捕集策略之一，但传统的热再生方法受到显著缺陷的阻碍。在这种情况下，电化学再生，特别是通过双极膜电渗析，提供了潜在的优势。然而，它的应用受到了酸室中二氧化碳气泡形成的挑战，这增加了能量需求。为了解决这个问题，提出了一种新的工艺，在这种工艺中，富溶剂中的碳酸盐与弱有机酸反应释放二氧化碳，同时在电渗析装置中形成酸盐，使酸和溶剂同时再生。迄今为止，最先进的技术还没有对这种方法进行全面的经济和环境评价。本研究旨在通过模拟传统工艺和基于甲酸和甲酸/乙酸混合物的替代途径来填补这一空白。建立全面的材料和能源平衡，以及对资本和运营支出的详细评估，并通过OpenLCA实施的生命周期评估来进行环境影响。虽然替代工艺表现出更高的能耗（2314 kWh/tonCO₂，甲酸为1907 kWh/tonCO₂，酸混合物为1943 kWh/tonCO₂），但传统路线在总体成本和环境影响方面仍然更有利。具体来说，传统捕集过程的总成本和气候变化影响估计分别为480美元/吨二氧化碳和-0.9593千克二氧化碳当量/千克二氧化碳。另一方面，使用甲酸和混合酸的替代工艺成本较高，分别为510美元/吨co2和519美元/吨co2，相应的环境影响分别为-0.9378 kgCO2eq/kgCO2和0.9238 kgCO2eq/kgCO2。进一步优化常规工艺，特别是在减少二氧化碳气泡形成方面，似乎对充分利用其经济和环境潜力至关重要。

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引用次数: 0

Enhanced CO2 electromethanogenesis using biogas over pure CO2 as MES feedstock: Performance and microbial mechanisms 使用沼气而非纯二氧化碳作为MES原料的强化二氧化碳电产甲烷：性能和微生物机制

Carbon Capture Science & Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-28 DOI: 10.1016/j.ccst.2026.100577

Yan Tian , Chao Li , Da Li , Hongxu Lu , Xiaoyu Li , Yujie Feng

Microbial electrosynthesis (MES) has shown excellent CO₂-to-CH₄ activity with pure CO₂ stream. However, its performance and electron transfer pathway has not been deeply unveiled when biogas was used as MES feedstock. In this work, mimic biogas composed of 60% CH₄ and 40% CO₂ was fed into biocathode MES (–1.0 V vs. Ag/AgCl) to evaluate its efficiency of biogas upgrading. Compared to pure CO₂-fed MES, the faradaic efficiency of biogas-fed MES was increased by 15.1% with 1.34-fold of conversion rate. Metagenomic sequencing and qPCR analysis revealed that the lower CO₂ content under biogas condition stimulated the enrichment of electroactive- methanogens and bacteria, which primarily facilitated electron transfer during CO₂ conversion. Notably, it was proposed that the spatial consortium of “methanogens–electroactive bacteria,” rather than the methanogen abundance within the biofilm, contributed to the CO₂-to-CH₄ performance. Overall, these results indicate that low CO₂ partial pressure in biogas enhances the activity of the methanogenic biocathode for biogas upgrading, rather than inhibiting methanogenesis. This study provides comprehensive insights into the mechanism of electromethanogenesis using biogas as MES feedstock. Future efforts should focus on the development of large-scale, practical continuous-flow systems to advance this technology.

微生物电合成（MES）在纯CO2流下表现出优异的CO2-to- ch4活性。然而，当沼气作为MES原料时，其性能和电子传递途径尚未深入揭示。本研究将60% CH4和40% CO2组成的模拟沼气放入生物阴极MES （-1.0 V vs. Ag/AgCl）中，评价其沼气升级效率。与纯co2供气MES相比，沼气供气MES的法拉第效率提高了15.1%，转化率提高了1.34倍。宏基因组测序和qPCR分析表明，沼气条件下较低的CO2含量刺激了电活性产甲烷菌和细菌的富集，这主要促进了CO2转化过程中的电子转移。值得注意的是，有人提出，“产甲烷菌-电活性细菌”的空间组合，而不是生物膜内产甲烷菌的丰度，对CO2-to-CH4的性能有贡献。综上所述，较低的CO2分压有利于提高产甲烷生物阴极的活性，而不是抑制产甲烷。本研究为利用沼气作为MES原料的电产甲烷机理提供了全面的见解。未来的工作应该集中在开发大规模的、实用的连续流系统来推进这项技术。

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引用次数: 0

Direct air capture (DAC) and CO2 sequestration with waste brine using a novel sorbent at ambient temperature 在环境温度下使用新型吸附剂的废盐水直接空气捕获（DAC）和CO2封存

Carbon Capture Science & Technology

Pub Date : 2026-03-01 Epub Date: 2026-02-06 DOI: 10.1016/j.ccst.2026.100584

Xinkai Wu , Hao Chen , Haibo Liu, Arup K. SenGupta

There is a global consensus that CO₂ capture and sequestration should continue at an accelerated pace to meet the IPCC (Intergovernmental Panel on Climate Change) recommendation in lowering the CO₂ concentration in the atmosphere. In recent years, deployment of direct air capture (DAC) has been on the rise through use of solid sorbents. In this study, we present for the first time a new DAC process that eliminates the need for geological storage and thermal desorption. A hybrid polymeric ion exchanger for decarbonization (DeCarbon-HIX), that is robust and durable, forms the heart of the process. Besides high CO₂ capture capacity from the atmosphere, the DeCarbon-HIX sorbent is amenable to regeneration with waste brine solution (e.g., produced water) containing Ca²⁺ whereby CO₂ is mineralized as solid, innocuous CaCO₃(s). Note that other recently developed DAC processes, namely, moisture swing DAC and electrochemistry-driven processes, operate without thermal energy but require CO₂ storage. This new avenue for DAC offers great opportunities to capture CO₂ in countries and islands where reliable geological storage is non-existent. This carbon dioxide removal methodology can be rapidly scaled up in many regions that are currently inaccessible to DAC.

全球一致认为，二氧化碳的捕获和封存应继续加快步伐，以满足政府间气候变化专门委员会（IPCC）关于降低大气中二氧化碳浓度的建议。近年来，通过使用固体吸附剂，直接空气捕获（DAC）的部署一直在上升。在这项研究中，我们首次提出了一种新的DAC工艺，该工艺消除了地质储存和热解吸的需要。用于脱碳的混合聚合物离子交换剂（deccarbon - hix）坚固耐用，是该过程的核心。除了从大气中捕获高CO2能力外，deccarbon - hix吸附剂还可以与含有Ca2+的废盐水溶液（例如采出水）再生，其中CO2被矿化为固体，无害的CaCO3(s)。请注意，最近开发的其他DAC工艺，即湿度摆动DAC和电化学驱动工艺，在没有热能的情况下运行，但需要二氧化碳储存。DAC的这一新途径为在不存在可靠地质储存的国家和岛屿捕获二氧化碳提供了巨大的机会。这种二氧化碳去除方法可以在目前DAC无法进入的许多地区迅速推广。

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引用次数: 0

A computational study of electric field-controlled CO2 Capture using earth-abundant metals 利用地球上丰富的金属进行电场控制CO2捕获的计算研究

Carbon Capture Science & Technology

Pub Date : 2026-03-01 Epub Date: 2026-02-07 DOI: 10.1016/j.ccst.2026.100585

Lakshmi Anil, Kulbir Kaur Ghuman

With the growing urgency to combat climate change, developing energy-efficient and tunable direct air capture (DAC) technologies for CO₂ removal has become an urgent scientific and engineering challenge. This study explores a novel strategy that leverages external electric fields (EFs) and surface charges to modulate CO₂ adsorption and desorption on low-cost, earth-abundant metal surfaces with varying d-orbital occupancies. Using Density Functional Theory (DFT), we systematically investigated Cu (111), Fe (110), and Zn (0001) surfaces, representing moderate, high, and inert reactivity, respectively.

Without external stimuli, Fe (110) intrinsically chemisorbs CO₂, while Cu (111) and Zn (0001) surfaces exhibit only weak physisorption. Upon application of an EF and excess surface charge, all three surfaces show enhanced CO₂ activation, with the effect being most pronounced on Cu (111) surface. The application of an EF leads to a transition from physisorption to chemisorption, accompanied by significant molecular activation. Reversing the field with a modest potential (∼ -2 V) enables efficient CO₂ desorption, completing a low-energy capture-release cycle. In contrast, Fe binds CO₂ too strongly, rendering desorption ineffective even under a strong reverse field (-40 V), while Zn remains largely unresponsive due to filled d-orbitals, showing minimal activation for CO₂ adsorption even at high field strengths (30 V).

Among the three, Cu (111) emerges as the most promising candidate for electrically tunable CO₂ capture, offering a balance between reactivity and reversibility due to its nearly filled d-band configuration. By elucidating the crucial roles of d-orbital occupancy and electric field sensitivity, this work presents electrically modulated adsorption and desorption as an effective carbon capture mechanism that eliminates the need for chemical functionalization, surface modification, or energy-intensive thermal or pressure processes. This approach opens new pathways for designing tunable CO₂ capture systems through targeted material selection and electric field engineering.

随着应对气候变化的紧迫性日益增加，开发节能、可调的直接空气捕获（DAC）技术来去除二氧化碳已成为一项紧迫的科学和工程挑战。本研究探索了一种利用外部电场（EFs）和表面电荷来调节二氧化碳在低成本、富含地球的金属表面上吸附和解吸的新策略，这些金属表面具有不同的d轨道占有率。利用密度泛函理论（DFT），我们系统地研究了Cu (111), Fe（110）和Zn（0001）表面，分别代表中等，高和惰性反应性。在没有外界刺激的情况下，Fe（110）本质上化学吸收CO2，而Cu（111）和Zn（0001）表面只表现出弱的物理吸附。在施加EF和过量表面电荷后，所有三个表面都表现出增强的CO2活化，其中Cu（111）表面的效果最为明显。EF的应用导致从物理吸附到化学吸附的转变，伴随着显著的分子活化。以适度的电位（~ -2 V）逆转磁场，实现有效的CO2解吸，完成低能量的捕获-释放循环。相比之下，Fe与CO2的结合过于强烈，即使在强大的反向电场（-40 V）下也无法解吸，而Zn由于填充d轨道而基本上没有反应，即使在高电场强度（30 V）下也表现出最小的CO2吸附活性。在这三种化合物中，Cu（111）是电可调CO2捕获最有希望的候选者，由于其几乎充满d波段的结构，在反应性和可逆性之间提供了平衡。通过阐明d轨道占用和电场敏感性的关键作用，本研究提出了电调制吸附和解吸作为一种有效的碳捕获机制，消除了对化学功能化、表面改性或能源密集型热或压力过程的需要。这种方法通过有针对性的材料选择和电场工程，为设计可调二氧化碳捕获系统开辟了新的途径。

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引用次数: 0

Investigating carbon sequestration in cementitious mortars with low-carbon binders and carbonated water 研究低碳粘结剂和碳酸水对水泥砂浆固碳的影响

Carbon Capture Science & Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-09 DOI: 10.1016/j.ccst.2026.100570

Aswathy Rajendran, Sripriya Rengaraju, Abir Al-Tabbaa

The use of carbonated water in cementitious systems as a carbon sequestration strategy is promising, offering operational simplicity and high CO₂ binding efficiency compared to approaches such as gaseous CO₂ injection and carbonation curing. However, its application in low-carbon cement systems, particularly emerging binders such as limestone calcined clay cement (LC³), remains underexplored. As the shift to low-carbon binders is critical for reducing embodied carbon in cement, it is essential to understand their interactions with carbonated water, given their distinct reactivity, pH evolution, and fresh-state behaviour. This study systematically investigates the effects of carbonated water on conventional low-carbon binders (Slag-50% and Slag-80%), emerging LC³, and OPC mortars. Evaluations covered fresh-state properties, mechanical performance, durability (sorptivity and porosity), and microstructural evolution at early and later ages. Results show the strongest interaction of carbonate ions with C₃A and its hydration products, with CO₂ binding governed by the nature of early hydrates and pH conditions. Contrary to the hypothesis that high-calcium systems such as OPC are most favourable for CO₂ binding, they exhibited reduced strength and durability. In contrast, LC³ and Slag-50% demonstrated the greatest benefits, with improved CO₂ binding, shortened setting times, enhanced strength and reduced sorptivity and porosity. Microstructural analysis confirmed CO₂ binding predominantly influenced calcium-silicate-hydrate gels with minimal calcite formation. Overall, carbonated water emerges as a practical pathway to improve performance while enabling additional CO₂ binding in LC³ and slag-50% cement systems, reinforcing their superior potential for carbon sequestration to OPC.

在胶凝系统中使用碳酸水作为固碳策略是很有前途的，与气体二氧化碳注入和碳化固化等方法相比，它具有操作简单和高二氧化碳结合效率的优点。然而，它在低碳水泥体系中的应用，特别是新兴的粘结剂，如石灰石煅烧粘土水泥（LC3），仍未得到充分的探索。由于向低碳粘结剂的转变对于减少水泥中的隐含碳至关重要，因此考虑到它们独特的反应性、pH值演变和新鲜状态行为，了解它们与碳酸水的相互作用至关重要。本研究系统地研究了碳酸水对传统低碳粘结剂（矿渣-50%和矿渣-80%）、新兴LC3和OPC砂浆的影响。评估内容包括新鲜状态特性、机械性能、耐久性（吸附性和孔隙率）以及早期和后期的微观结构演变。结果表明，碳酸盐离子与C3A及其水化产物的相互作用最强，其与CO2的结合受早期水合物性质和pH条件的制约。与高钙体系（如OPC）最有利于二氧化碳结合的假设相反，它们表现出强度和耐久性降低。相比之下，LC3和炉渣-50%表现出最大的效益，改善了CO2结合，缩短了凝结时间，提高了强度，降低了吸附率和孔隙率。微观结构分析证实，二氧化碳结合主要影响硅酸钙水合物凝胶，方解石形成较少。总的来说，碳酸水是一种实用的方法，可以提高性能，同时在LC3和矿渣-50%的水泥体系中增加二氧化碳的结合，增强其对OPC的碳封存潜力。

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引用次数: 0

Modifying CO2 absorption-desorption: A comprehensive review of advances in process design, solvent engineering, energy integration, and operational optimisation 修改二氧化碳吸收-解吸：在工艺设计，溶剂工程，能源集成和操作优化方面的全面进展综述

Carbon Capture Science & Technology

Pub Date : 2026-03-01 Epub Date: 2025-11-26 DOI: 10.1016/j.ccst.2025.100548

Meisam Ansarpour, Tohid N. Borhani

Efficient carbon capture through CO₂ absorption-desorption processes is crucial for mitigating climate change and meeting global greenhouse gas reduction targets. This comprehensive review synthesises over a decade of advancements addressing the technical and economic challenges pertinent to absorption-based carbon capture. It focuses on four critical aspects: process configuration, solvent innovation, energy integration, and operational optimisation. The review evaluates emerging process designs that improve CO₂ capture efficiency and reduce energy penalties, including absorber intercooling, advanced stripper configurations, and solvent recycle strategies. Further, it critically assesses novel solvents and solvent mixtures such as amines, ionic liquids, deep eutectic solvents, biphasic systems, and nanofluids, aimed at enhancing solvent stability, absorption capacity, and cyclic performance. The paper highlights energy-saving techniques through heat and mass integration as well as emerging heat pump technologies that minimise heat loss, thereby improving overall system sustainability. Additionally, this review covers the expanding use of computational methods, including experimental design, machine learning, artificial intelligence, and metaheuristic optimisation, to identify optimal operating conditions and improve process scalability. Unlike previous reviews, this study integrates advances across multiple disciplines include process engineering, solvent chemistry, energy management, and computational optimisation by providing a holistic view of current progress and remaining gaps. It offers practical insights and recommendations to guide future research and accelerate the industrial deployment of cost-effective and energy-efficient CO₂ capture technologies. The novelty and urgency of this synthesis lie in its multidisciplinary approach combining experimental, theoretical, and computational studies to address persistent challenges and future opportunities in carbon capture science.

通过二氧化碳吸收-解吸过程实现高效的碳捕获对于减缓气候变化和实现全球温室气体减排目标至关重要。这篇全面的综述综合了十多年来在解决以吸收为基础的碳捕获相关的技术和经济挑战方面的进展。它侧重于四个关键方面：工艺配置，溶剂创新，能源整合和操作优化。该评论评估了提高二氧化碳捕获效率和减少能源损失的新兴工艺设计，包括吸收器中间冷却、先进的汽提塔配置和溶剂回收策略。此外，它批判性地评估了新型溶剂和溶剂混合物，如胺、离子液体、深共晶溶剂、双相系统和纳米流体，旨在提高溶剂稳定性、吸收能力和循环性能。本文重点介绍了通过热量和质量集成的节能技术以及新兴的热泵技术，这些技术可以最大限度地减少热量损失，从而提高整个系统的可持续性。此外，本综述涵盖了计算方法的扩展使用，包括实验设计，机器学习，人工智能和元启发式优化，以确定最佳操作条件并提高过程可扩展性。与之前的评论不同，本研究通过提供当前进展和剩余差距的整体视图，整合了多个学科的进展，包括工艺工程、溶剂化学、能源管理和计算优化。它提供了实用的见解和建议，以指导未来的研究，并加速具有成本效益和节能的二氧化碳捕获技术的工业部署。这种综合的新颖性和紧迫性在于其多学科方法结合了实验，理论和计算研究，以解决碳捕获科学中持续存在的挑战和未来的机遇。

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引用次数: 0

A comprehensive review on the conversion of CO2 into solid carbon materials 二氧化碳转化为固体碳材料的研究综述

Carbon Capture Science & Technology

Pub Date : 2026-03-01 Epub Date: 2025-11-28 DOI: 10.1016/j.ccst.2025.100547

Bentolhoda Chenarani, Ahad Ghaemi, Alireza Hemmati

The conversion of carbon dioxide (CO₂) into valuable solid carbon materials presents a promising approach for carbon utilization and climate change mitigation. This review systematically evaluates six major carbon allotropes: graphene, carbon nanotubes (CNTs), carbon nanofibers (CNFs), fullerenes, diamonds, and porous carbon, with a focus on synthesis methods, operating conditions, and industrial feasibility. Among these, CNTs and CNFs show the highest potential, especially when produced via molten carbonate electrolysis or the Solar Thermal Electrochemical Process (STEP), which operate at approximately 750–770 °C and near-atmospheric pressure. These methods have demonstrated high carbon conversion efficiencies and significantly lower estimated production costs compared to conventional CVD techniques, due to their simpler operation and lower material costs. Graphene, although high in quality, requires approximately 1000 °C and expensive catalysts, making it less scalable. Fullerenes (C₆₀) and diamonds have very low yields (<1 %) and require extreme pressures (up to 1000 atm), limiting their industrial use. Porous carbons, synthesized electrochemically or by metal/inorganic reduction at 500–850 °C, show promise for supercapacitors and adsorption, with yields up to 55.3 wt % and built-in doping capabilities. Metal-mediated methods using Mg, Zn, and NaBH₄ offer simplicity, moderate conditions, and tunable structures, while new hybrid approaches provide synergistic benefits. Overall, molten salt electrochemical methods are highly promising candidates for scalable and energy-efficient processes, supporting CO₂ valorization in sustainable carbon material production.

将二氧化碳（CO2）转化为有价值的固体碳材料是碳利用和减缓气候变化的一种有前途的方法。本文系统评价了六种主要的碳同素异形体：石墨烯、碳纳米管（CNTs）、碳纳米纤维（CNFs）、富勒烯、金刚石和多孔碳，重点介绍了合成方法、操作条件和工业可行性。其中，碳纳米管和CNFs表现出最大的潜力，特别是通过熔融碳酸盐电解或太阳能热电化学过程（STEP）生产时，其工作温度约为750-770°C，接近大气压。与传统的CVD技术相比，这些方法具有较高的碳转化效率和显著降低的估计生产成本，因为它们的操作更简单，材料成本更低。石墨烯虽然质量很高，但需要大约1000°C的温度和昂贵的催化剂，这使得它的可扩展性较差。富勒烯（C60）和钻石的产率非常低（1%），并且需要极高的压力（高达1000 atm），限制了它们的工业应用。多孔碳，在500-850℃下通过电化学或金属/无机还原合成，有望用于超级电容器和吸附，收率高达55.3% wt %，并具有内置掺杂能力。使用Mg、Zn和NaBH4的金属介导方法具有简单、条件适中和结构可调的优点，而新的混合方法具有协同效应。总的来说，熔盐电化学方法是非常有前途的可扩展和节能工艺，支持可持续碳材料生产中的二氧化碳增值。

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引用次数: 0

Hybrid ionic liquid amine solvents for CO₂ capture from natural gas: a systematic review of techno-economic and environmental performance 用于从天然气中捕集二氧化碳的混合离子液体胺溶剂：技术、经济和环境性能的系统综述

Carbon Capture Science & Technology

Pub Date : 2026-03-01 Epub Date: 2025-11-26 DOI: 10.1016/j.ccst.2025.100549

Syed Ali Ammar Taqvi , Bilal Kazmi , Dagmar Juchelková , Muhammad Shahbaz , Salman Raza Naqvi

The global transition to clean energy demands reliable low-carbon fuels, positioning natural gas (NG) as a critical bridge in mitigating climate change. Its lower greenhouse gas emissions compared to coal and oil, combined with abundant reserves, make NG a vital option for sustainable power generation and industrial use. However, its environmental benefits depend on effective purification, particularly CO₂ removal, which determines gas quality, efficiency, and processing costs. This study critically reviews recent developments (2000–2024) in CO₂ capture from NG using hybrid ionic liquid–amine systems, evaluating techno-economic and environmental performance. A systematic evaluation was performed using published experimental, modelling, and process simulation data. Published data concerning experimental, modelling, and techno-economic data were considered in a systematic evaluation to compare the performance of conventional absorption, adsorption, membrane, cryogenic and hybrid solvent processes. Hybrid IL–amine solvents achieve 93–98 % CO₂ capture efficiency with 20–30 % lower regeneration energy compared to MEA, although at TRL 5–6. These developments highlight the potential of NG to serve as a cleaner transitional fuel while reinforcing the need for integrated policies and technologies that ensure responsible production and utilization. Advancing purification technologies are therefore central to maximizing the role of natural gas in the global clean energy transition.

全球向清洁能源的转型需要可靠的低碳燃料，天然气被定位为减缓气候变化的关键桥梁。与煤炭和石油相比，天然气的温室气体排放量更低，加上储量丰富，使其成为可持续发电和工业使用的重要选择。然而，它的环境效益取决于有效的净化，特别是CO₂的去除，这决定了气体的质量、效率和处理成本。本研究批判性地回顾了使用混合离子液体-胺系统从天然气中捕集CO₂的最新进展（2000-2024），评估了技术经济和环境性能。使用已发表的实验、建模和过程模拟数据进行系统评估。在系统评估中考虑了有关实验、建模和技术经济数据的公开数据，以比较传统吸收、吸附、膜、低温和混合溶剂工艺的性能。混合il -胺溶剂达到93 - 98%的CO₂捕获效率，与MEA相比，再生能量低20 - 30%，尽管TRL为5-6。这些发展突出了天然气作为一种更清洁的过渡燃料的潜力，同时加强了确保负责任的生产和利用的综合政策和技术的必要性。因此，先进的净化技术对于最大限度地发挥天然气在全球清洁能源转型中的作用至关重要。

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引用次数: 0

Deciphering salt precipitation in saline aquifer carbon sequestration: Insight from microfluidic and molecular perspectives 解读含盐含水层碳封存中的盐沉淀：从微流体和分子角度的见解

Carbon Capture Science & Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-24 DOI: 10.1016/j.ccst.2026.100574

Bo Wang , Yuanhao Chang , Rui Ma , Xiangzeng Wang , Fujie Jiang , Fanhua Zeng

Saline aquifer carbon sequestration is a key strategy for mitigating greenhouse gas emissions and supporting energy sustainability. However, salt precipitation induced by CO₂ injection can substantially impair storage efficiency. A clear understanding of salt precipitation dynamics is therefore essential for predicting crystal distribution and assessing pore-scale structural damage. In this study, microfluidic technology combined with image-based quantitative pore-scale analysis was used to systematically investigate salt precipitation behavior. Molecular dynamics (MD) simulations were performed to complement microfluidic experiments and to elucidate the molecular mechanisms underlying ion interaction and salt crystallization. The results indicate that salt precipitation proceeds through five stages: nucleation, migration, growth, retention, and blockage. Nucleation occurs in two distinct structural forms at four characteristic locations, including bulk crystals in high-saturation regions and porous aggregated crystals in low-saturation areas. Crystal migration is governed by the availability of brine as a transport medium and by weak crystal–surface adhesion. Retention and blockage develop through both in-situ and ex-situ modes, with hygroscopicity, concentration gradients, and capillary backflow playing critical roles in ex-situ precipitation. MD simulations revealed salt precipitation features consistent with those observed in the microfluidic experiments and confirmed that nucleation preferentially occurs at gas-liquid interfaces and three-phase contact regions, driven by ion aggregation and surface interactions. In porous media, both brine evaporation and salt crystallization follow a three-stage process, which significantly impacts pore structure and permeability. This study provides new mechanistic insights into salt-induced pore blockage and offers guidance for optimizing CO₂ injection strategies, thereby advancing the understanding of salt precipitation processes in subsurface gas storage and related engineering applications.

盐碱层碳封存是减少温室气体排放和支持能源可持续性的关键战略。然而，CO2注入引起的盐沉淀会严重影响储存效率。因此，清楚地了解盐沉淀动力学对于预测晶体分布和评估孔隙尺度结构损伤至关重要。本研究采用微流控技术结合基于图像的定量孔隙尺度分析，系统地研究了盐的沉淀行为。分子动力学（MD）模拟是为了补充微流体实验，阐明离子相互作用和盐结晶的分子机制。结果表明，盐的析出经历了成核、迁移、生长、滞留和堵塞五个阶段。成核在四个特征位置以两种不同的结构形式发生，包括高饱和区域的块状晶体和低饱和区域的多孔聚集晶体。晶体迁移受卤水作为传输介质的可用性和晶体与表面的弱附着力控制。保留和阻塞通过原位和非原位模式发展，吸湿性、浓度梯度和毛细回流在非原位降水中起关键作用。MD模拟显示，盐沉淀特征与微流控实验中观察到的一致，并证实在离子聚集和表面相互作用的驱动下，成核优先发生在气液界面和三相接触区域。在多孔介质中，卤水蒸发和盐结晶过程分为三个阶段，对孔隙结构和渗透率有显著影响。该研究为盐致孔隙堵塞提供了新的机理认识，并为优化CO2注入策略提供了指导，从而促进了对地下储气库盐沉淀过程的理解和相关工程应用。

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引用次数: 0

Continuous CO2 capture using a hollow fiber membrane contactor with stripper regeneration: Bench-scale validation with amino acid salt–piperazine absorbents 连续CO2捕获使用中空纤维膜接触器与脱提器再生：氨基酸盐-哌嗪吸收剂的实验规模验证

Carbon Capture Science & Technology

Pub Date : 2026-03-01 Epub Date: 2026-01-17 DOI: 10.1016/j.ccst.2026.100573

Hyunji Lim , Kwanghwi Kim , Hyun Sic Park , Jo Hong Kang , Jinwon Park , Hojun Song

Membrane contactor technologies offer a promising solution for CO₂ capture; however, their optimization remains challenging. This study explored the CO₂ absorption and desorption performances in a hybrid process involving a hollow fiber membrane contactor (HFMC) and a stripping tower in a bench-scale system. Three absorbents [2.5 M monoethanolamine (MEA), potassium serinate + piperazine (PSZ), and potassium alaninate + piperazine (PAZ)] were tested at total absorbent molarity under varying liquid flow rates to evaluate their CO₂ removal efficiencies, absorption fluxes, and overall mass transfer coefficients. The results showed that PAZ exhibited the highest CO₂ capture performance, while also significantly reducing the regeneration energy and membrane wetting. The PAZ absorbent maintained a stable performance during simultaneous operation, with a 73 % reduction in crossover volume and a 31 % decrease in the regeneration energy compared to MEA. The membrane contactor process demonstrated enhanced characteristics compared to a conventional packed column under similar gas flow rates, with a four times higher CO₂ absorption rate and a 79 % smaller unit volume. Furthermore, long-term oxidative degradation tests confirmed the durability of the PAZ absorbent. Overall, this study demonstrates the potential of combining HFMCs with optimized PAZ absorbents to enhance the CO₂ capture efficiency and minimize operational challenges, leading to a more compact and efficient carbon capture process.

膜接触器技术为二氧化碳捕获提供了一个很有前途的解决方案；然而，它们的优化仍然具有挑战性。研究了中空纤维膜接触器（HFMC）与汽提塔混合工艺在实验系统中的CO2吸收和解吸性能。在不同液体流速下测试了三种吸收剂[2.5 M单乙醇胺（MEA）、丝氨酸钾+哌嗪（PSZ）和丙氨酸钾+哌嗪（PAZ）]的总吸附剂摩尔浓度，以评估它们的CO2去除效率、吸收通量和总传质系数。结果表明，PAZ具有最高的CO2捕获性能，同时也显著降低了再生能量和膜润湿性。与MEA相比，PAZ吸收剂在同时运行时保持稳定的性能，交叉体积减少73%，再生能量减少31%。在相同的气体流速下，膜接触器工艺与传统填料塔相比，具有更强的特性，二氧化碳吸收率提高了4倍，单位体积减小了79%。此外，长期氧化降解试验证实了PAZ吸附剂的耐久性。总体而言，该研究表明，将hfmc与优化的PAZ吸收剂相结合，可以提高二氧化碳捕集效率，最大限度地减少操作挑战，从而实现更紧凑、更高效的碳捕集过程。

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引用次数: 0