Carbon Capture Science & Technology最新文献

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 : 2026-01-24 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

AI-driven Carbon Capture and Storage (CCS): an analysis of emerging technologies for sustainable climate solutions 人工智能驱动的碳捕集与封存（CCS）：可持续气候解决方案新兴技术分析

Carbon Capture Science & Technology

Pub Date : 2026-01-23 DOI: 10.1016/j.ccst.2026.100576

Chaudhri Abdur Raheem, Syed Qasim Ali Shah, Unib Arshad Lodhi, Muhammad Fahim Khokhar

Climate change is driven by large greenhouse gas emissions, which have raised an alarm in efforts to reduce atmospheric carbon dioxide levels with CCS, drawing attention to decarbonization efforts. This review provides a comprehensive analysis of current Carbon Dioxide (CO₂) capture methods, including absorption, adsorption, and membrane separation and emerging Direct Air Capture (DAC), while addressing their limitations in cost, efficiency, and scalability. A key focus is the emerging role of Artificial Intelligence (AI) in accelerating CCS deployment. AI-driven techniques, particularly machine learning, are being applied to optimize capture processes, improve system performance, and facilitate the discovery of advanced materials. We synthesize evidence on supervised and unsupervised learning, reinforcement learning and generative models mapped to concrete CCS tasks: sorbent/solvent screening, soft sensing, emissions forecasting, digital-twin control, and storage integrity surveillance This review also highlights recent advancements at the intersection of AI and CCS, evaluates their potential for large-scale implementation, and discusses remaining technical and policy challenges. The findings underscore the strategic importance of integrating AI to enhance the effectiveness and scalability of CCS in support of global decarbonization goals.

气候变化是由大量温室气体排放驱动的，这给CCS减少大气二氧化碳水平的努力敲响了警钟，引起了人们对脱碳努力的关注。这篇综述全面分析了目前二氧化碳（CO2）捕获方法，包括吸收、吸附、膜分离和新兴的直接空气捕获（DAC），同时解决了它们在成本、效率和可扩展性方面的局限性。一个关键的焦点是人工智能（AI）在加速CCS部署方面的新兴作用。人工智能驱动的技术，特别是机器学习，正被应用于优化捕获过程，提高系统性能，并促进先进材料的发现。我们综合了有关监督学习和无监督学习、强化学习和生成模型的证据，并将其映射到具体的CCS任务：吸附剂/溶剂筛选、软测量、排放预测、数字孪生控制和存储完整性监测。本文还强调了人工智能和CCS交叉领域的最新进展，评估了它们大规模实施的潜力，并讨论了剩余的技术和政策挑战。研究结果强调了整合人工智能对提高CCS的有效性和可扩展性以支持全球脱碳目标的战略重要性。

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引用次数: 0

Effects of metal-modified catalysts on the desorption performance of mixed amine solutions and machine learning prediction 金属改性催化剂对混合胺溶液解吸性能的影响及机器学习预测

Carbon Capture Science & Technology

Pub Date : 2026-01-21 DOI: 10.1016/j.ccst.2026.100575

Xunxuan Heng , Zhenzhen Zhang , Longhua Zhu , Li Yang , Shugang Xie , Zeyu Wang , Dongtai Han , Fang Liu , Kunlei Liu

The high energy penalty associated with solvent regeneration is still a major bottleneck in amine-based CO₂ capture. In this work, the effects of five solid acid catalysts on the desorption performance of a mixed-amine solvent were compared, and the HY catalyst with superior desorption behavior was selected and further modified with four transition metals (Co, Mn, Gr and Ce) to enhance its catalytic activity. The findings indicate that the CO₂ desorption capacity and maximum desorption rate of the Co-modified HY catalyst reach 48.96 mmol and 0.02211 mmol/s, corresponding to increases of 36.80% and 35.39% relative to the blank system, while the relative regenerative load decreases to 73.12% of the blank. In the later stage of desorption, the value of the desorption factor (DF) reaches 1.33 × 10^–6 mol³·kJ^-1·min^-1, which is 259.46% higher than that of the blank, and the catalyst also exhibits good cyclic stability with negligible impact on the absorption performance. Field Emission Scanning Electron Microscope (FESEM), Brunauer-Emmett-Teller (BET), X-ray Diffraction (XRD) and Fourier Transform infrared spectroscopy (FTIR) characterizations indicate that the catalyst does not alter the chemical composition of the absorbent. Furthermore, six machine-learning models were developed to predict the desorption behavior, among which the Spline-KRR model achieves an RMSE of only 0.00133, with R² and Pearson correlation coefficients of 0.992 and 0.998, respectively, demonstrating high fitting accuracy without obvious outliers and confirming the reliability of the model. Future efforts will continue optimizing this catalyst system, providing robust technological support for greenhouse gas reduction and climate change mitigation.

与溶剂再生相关的高能量损失仍然是胺基CO2捕获的主要瓶颈。本文比较了5种固体酸催化剂对混合胺溶剂解吸性能的影响，选择了解吸性能较好的HY催化剂，并用4种过渡金属（Co、Mn、Gr和Ce）对HY催化剂进行了进一步改性，以提高其催化活性。结果表明，共改性HY催化剂的CO2解吸能力和最大解吸速率分别达到48.96 mmol和0.02211 mmol/s，相对空白体系分别提高了36.80%和35.39%，相对再生负荷下降到空白体系的73.12%。在解吸后期，催化剂的解吸因子（DF）达到1.33 × 10-6 mol3·kk -1·min-1，比空白提高了259.46%，且催化剂具有良好的循环稳定性，对吸附性能的影响可以忽略不计。场发射扫描电镜（FESEM）、布鲁诺尔-埃米特-泰勒（BET）、x射线衍射（XRD）和傅里叶变换红外光谱（FTIR）表征表明，催化剂没有改变吸收剂的化学组成。建立了6个机器学习模型来预测脱附行为，其中样条- krr模型的RMSE仅为0.00133，R2和Pearson相关系数分别为0.992和0.998，拟合精度高，无明显异常值，证实了模型的可靠性。未来的努力将继续优化这一催化剂体系，为减少温室气体和减缓气候变化提供强有力的技术支持。

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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 : 2026-01-17 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

Persulfate–derived porous wollastonite granules for accelerated CO2 mineralization and suitability for aggregate applications 过硫酸盐衍生多孔硅灰石颗粒加速二氧化碳矿化和适合骨料应用

Carbon Capture Science & Technology

Pub Date : 2026-01-16 DOI: 10.1016/j.ccst.2026.100571

Prince Allah, Tero Luukkonen, Paivo Kinnunen, Priyadharshini Perumal

Mineral carbonation technology is a promising solution for CO₂ capture and utilization. To achieve large scale application of the technology, the challenges related to CO₂ diffusion and passivation by carbonate precipitation must be overcome. In this work, we demonstrate a route to high volume CO₂ capture by granulation and carbonation using wollastonite, polyvinyl alcohol (pva) and potassium persulfate. The wollastonite powder was granulated with 10% pva solution, incorporating 10–100 wt% of granulation fluid of potassium persulfate as pore–forming agent. The utility of some granules was extended by esterification reaction in citric acid solution. The granules were carbonated in a pressured reactor (10 bar, 100 °C) and the influence of pore–forming amount on carbonate passivation and CO₂ diffusion was studied by thermogravimetry, optical, electron microscopy and N₂ adsorption. The experiments revealed that 20% persulfate produced highly porous granules with an interconnected pore structure that reduced carbonate passivation and captured the highest amount of CO₂ (44mol%). Comparatively, mix designs with 0, 10 and 100 wt% persulfate showed low carbonation due to poor CO₂ diffusion attributed to surface passivation by carbonates and sulfates. Additionally, pore structure and surface modelling using Frankel–Halsey–Hill (FHH) fractal analysis concludes that 20% persulfate in both fresh and esterified granules produced a less tortuous and uniform pore structure with high interconnectivity, aiding CO₂ diffusion within the granules which resulted in high amount of carbonation products while preventing passivation. After carbonation, the aggregates maintained high strength and light weight, confirming their high potential as a high-volume CO₂ negative artificial lightweight aggregate in construction.

矿物碳酸化技术是一种很有前途的二氧化碳捕获和利用解决方案。为了实现该技术的大规模应用，必须克服二氧化碳扩散和碳酸盐沉淀钝化的挑战。在这项工作中，我们展示了一种利用硅灰石、聚乙烯醇（pva）和过硫酸钾进行造粒和碳化的方法来捕获大量二氧化碳的途径。硅灰石粉用10%的聚乙烯醇溶液造粒，加入10 - 100wt %的过硫酸钾造粒液作成孔剂。通过在柠檬酸溶液中酯化反应，扩大了某些颗粒的使用范围。在压力反应器（10 bar, 100℃）中碳化颗粒，通过热重、光学、电子显微镜和N2吸附研究成孔量对碳酸盐钝化和CO2扩散的影响。实验表明，20%的过硫酸盐产生了具有互连孔结构的高多孔颗粒，减少了碳酸盐钝化，并捕获了最高量的CO2 （44mol%）。相比之下，含有0、10%和100%过硫酸盐的混合物设计显示出低碳化，这是由于碳酸盐和硫酸盐表面钝化导致二氧化碳扩散不良。此外，利用Frankel-Halsey-Hill （FHH）分形分析进行的孔隙结构和表面建模得出结论，20%的过硫酸盐在新鲜颗粒和酯化颗粒中产生的孔隙结构不那么弯曲和均匀，具有较高的互联性，有助于二氧化碳在颗粒内的扩散，从而产生大量的碳化产物，同时防止钝化。碳化后，骨料保持了高强度和轻重量，证实了它们在建筑中作为大体积负二氧化碳人工轻质骨料的巨大潜力。

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引用次数: 0

Effect of cation’s alkyl chain length of imidazolium-driven PVDF-based supported ionic liquid membranes on the CO2 separation performance from biogas and flue gas 咪唑驱动pvdf基负载离子液体膜阳离子烷基链长对沼气和烟气CO2分离性能的影响

Carbon Capture Science & Technology

Pub Date : 2026-01-16 DOI: 10.1016/j.ccst.2026.100572

G. Marco-Velasco, V. Martínez-Soria, M. Izquierdo, A. Cháfer, J.D. Badia-Valiente

This study investigates the impact of the alkyl chain length in imidazolium-based ILs on SILMs using poly(vinylidene fluoride) (PVDF) as a polymer substrate on the membrane’s physicochemical properties and CO₂ separation performance from CO₂/CH₄ and CO₂/N₂ gas mixtures. Particularly, 1-Ethyl, 1-Butyl and 1-Hexyl 3-methylimidazolium bis(trifluoromethylsulfonyl)imide, i.e. [EMIM][NTf₂], [BMIM][NTf₂], and [HMIM][NTf₂]-based SILMs, were assessed. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) confirmed and quantified the presence of ILs within the polymeric matrix, while differential scanning calorimetry (DSC) suggested larger electrostatic interactions for shorter alkyl chains on imidazolium cations. CO₂, CH₄ and N₂ permeability of each SILM were assessed by single-gas permeability tests and their CO₂/N₂ and CO₂/CH₄ selectivity were achieved. ILs with shorter alkyl chain presented stronger interactions with CO₂ molecules. [EMIM][NTf₂] SILM exhibited the highest single-gas CO₂ permeability (357.0 Barrer), CO₂/CH₄ selectivity (α_CO2/CH4 =23.5) and CO₂/N₂ selectivity (α_CO2/N2 =16.4), which were competitive when benchmarked in an upper bound plot. Afterwards, this SILM was tested in extended experiments under dry and humid conditions (≥ 90 h each), in which CO₂ feed composition was modified between CO₂/CH₄ 50/50 %v/v and 25/75 %v/v. CH₄ permeability increased as its proportion in the feed was reduced (from 15.4 Barrer using 100 %v/v CH₄ to 20.5 and 19.9 Barrer when CH₄ was fed at 50 %v/v or higher, under dry and humid conditions, respectively), affecting CO₂/CH₄ selectivity (from ∼24 for single gas to ∼17 and ∼19 in dry and humid experiments, respectively), remaining competitive regarding the technological benchmarking.

本文研究了以聚偏氟乙烯（PVDF）为聚合物底物的咪唑基膜的烷基链长度对膜的物理化学性能和CO2/CH4和CO2/N2混合气体分离性能的影响。特别是对1-乙基、1-丁基和1-己基3-甲基咪唑双（三氟甲基磺酰基）亚胺，即[EMIM][NTf2]、[BMIM][NTf2]和[HMIM][NTf2]基silm进行了评估。傅里叶变换红外光谱（FTIR）、扫描电镜（SEM）和能量色散x射线（EDX）证实并量化了聚合物基体中il的存在，而差示扫描量热法（DSC）表明咪唑阳离子上较短的烷基链存在较大的静电相互作用。通过单气体渗透性测试，评估了各SILM的CO2、CH4和N2渗透率，获得了其CO2/N2和CO2/CH4选择性。烷基链较短的ILs与CO2分子的相互作用较强。[EMIM][NTf₂]SILM表现出最高的单气CO₂渗透率（357.0 Barrer）， CO2/CH4选择性（αCO2/CH4 =23.5）和CO2/N2选择性（αCO2/N2 =16.4），在上界基准图中具有竞争性。然后，在干湿条件下（≥90 h）对该SILM进行扩展试验，其中CO2饲料成分在CO2/CH4 50/ 50% v/v和25/ 75% v/v之间进行改性。CH4渗透率随着其在饲料中所占比例的降低而增加（在干燥和潮湿条件下，分别从100% v/v CH4时的15.4 Barrer降至50% v/v或更高CH4时的20.5 Barrer和19.9 Barrer），影响CO2/CH4的选择性（在干燥和潮湿条件下，分别从单一气体的~ 24降至干燥和潮湿条件下的~ 17和~ 19），在技术基准方面保持竞争力。

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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 : 2026-01-09 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

Additive manufacturing of architected Ca(OH)2 monoliths for accelerated CO2 mineralization 用于加速CO2矿化的结构Ca(OH)2单体的增材制造

Carbon Capture Science & Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.ccst.2026.100568

Injun Park , Sunwoo Kim , Byeongju Jeon , Huiryung Heo , Siyoung Q. Choi , Jay H. Lee , Dong-Yeun Koh

Effective CCU technologies demand robust, scalable sorbents with high CO₂ selectivity and capacity. While calcium hydroxide (Ca(OH)₂) offers high CO₂ uptake via mineral carbonation, its practical application is hindered by slow reaction kinetics and difficulties in forming mechanically stable, structured beds. Here, we report a direct ink writing (DIW) approach to fabricate 3D-printed Ca(OH)₂ monoliths using water-based inks formulated with carboxymethyl cellulose (CMC). Under humid conditions (RH95, 1–10 mol % CO₂), the monolith achieves >99 % conversion to calcium carbonate, with similarly strong performance maintained at 400 ppm CO₂ relevant to direct air capture (DAC). The structured sorbent also exhibits extremely low pressure drop (∼2 Pa/cm), making it suitable for scaled-up applications. A techno-economic analysis (TEA) for the DAC case, incorporating parallel nozzle printing, shows that the levelized cost of capture (LCOC) can be reduced to 339 US$/tCO₂, with break-even scenarios attainable through carbon subsidies or high-value reuse of the monolith reuse. Overall, this work establishes a dry, scalable pathway for fabricating reactive structured Ca(OH)₂ sorbents for CCU applications.

有效的CCU技术需要具有高CO2选择性和容量的强大，可扩展的吸附剂。虽然氢氧化钙（Ca(OH)2）通过矿物碳酸化提供了高的二氧化碳吸收率，但其实际应用受到反应动力学缓慢和难以形成机械稳定的结构层的阻碍。在这里，我们报告了一种直接墨水书写（DIW）方法，使用羧甲基纤维素（CMC）配制的水性油墨来制造3d打印的Ca(OH)2单体。在潮湿的条件下（RH95, 1-10 mol %的二氧化碳），整体实现99%的转化为碳酸钙，与直接空气捕获（DAC）相关的400 ppm二氧化碳保持同样强大的性能。结构吸附剂还具有极低的压降（~ 2 Pa/cm），使其适合扩大应用。采用平行喷嘴印刷的DAC案例的技术经济分析（TEA）表明，捕集的平准化成本（LCOC）可降至每吨二氧化碳339美元，通过碳补贴或单体再利用的高价值再利用可实现收支平衡。总的来说，这项工作建立了一种干燥的、可扩展的途径，用于制造用于CCU应用的活性结构Ca(OH)2吸附剂。

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引用次数: 0

Warm gas carbon dioxide capture from the anode off-gas in solid oxide fuel cell-gas turbine hybrid power generation systems: A technoeconomic investigation considering economies-of-scale 固体氧化物燃料电池-燃气轮机混合发电系统中阳极废气的热气体二氧化碳捕获：考虑规模经济的技术经济研究

Carbon Capture Science & Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.ccst.2025.100562

Yee Lee Chen , Praneet Atul Chotalia , Fabian Rosner

The thermodynamic and economic performance of a warm gas pressure swing adsorption (PSA) technology for carbon dioxide (CO₂) capture directly from the anode off-gas in a solid oxide fuel cell (SOFC)-gas turbine (GT) hybrid power generation system is investigated. Warm gas CO₂ capture provides advantages over ambient temperature CO₂ capture by retaining water vapor in the anode off-gas, simplifying heat integration and preserving higher mass flows through the turbine, maximizing energy efficiency and downstream power generation. Four cases of natural gas (NG)-powered SOFC-GT hybrid plants are compared: 10 MW and 50 MW systems without carbon capture, and 50 MW and 100 MW systems with carbon capture. At the 50 MW scale, the efficiency of the system without carbon capture achieves 75.32 %-LHV and the system with carbon capture achieves 68.22 %-LHV. This decrease in efficiency is governed by the loss of mass that moves through the turbine and the energy penalty associated with the heat needed for regeneration. The cost-of-capture of the warm gas PSA system is $74.87 (with TS&M) or $46.18 (without TS&M) per metric tonne of CO₂. Efficiency improvements due to scaleup are marginal, nevertheless, the larger-scale hybrids are shown to be substantially more cost-effective. Comparing the 50 MW hybrid with carbon capture to the 100 MW hybrid, the specific plant cost decreases by 4.7 % and the cost of electricity decreases by 5.4 %. The analysis establishes warm gas PSA as a promising approach for integrating efficient and economic carbon capture into SOFC-GT hybrid power generation systems.

研究了固体氧化物燃料电池(SOFC)-燃气轮机（GT）混合发电系统中暖气变压吸附（PSA）技术直接从阳极废气中捕集二氧化碳（CO2）的热力学和经济性能。通过将水蒸气保留在阳极废气中，简化热集成并保持通过涡轮机的更高质量流量，最大限度地提高能源效率和下游发电，热气体CO2捕获比环境温度CO2捕获具有优势。对四种天然气（NG）驱动的SOFC-GT混合电厂进行了比较：无碳捕集的10兆瓦和50兆瓦系统，以及有碳捕集的50兆瓦和100兆瓦系统。在50 MW规模下，无碳捕集系统的效率达到75.32% -LHV，有碳捕集系统的效率达到68.22% -LHV。这种效率的下降是由通过涡轮机的质量损失和与再生所需的热量相关的能量损失控制的。暖气体PSA系统的捕获成本为每公吨二氧化碳74.87美元（含TS&；M）或46.18美元（不含TS&；M）。由于规模扩大而带来的效率提高是微不足道的，然而，大规模混合动力车的成本效益大大提高。将带有碳捕获的50兆瓦混合动力与100兆瓦混合动力相比，具体工厂成本降低了4.7%，电力成本降低了5.4%。分析表明，暖气PSA是一种很有前途的方法，可以将高效、经济的碳捕获整合到SOFC-GT混合发电系统中。

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引用次数: 0

Comparative environmental techno-economic assessments (eTEAs) of onboard amine-based carbon capture and boil-off gas handling systems on LCO2 carriers LCO2载体上基于胺的碳捕获和蒸发气体处理系统的比较环境技术经济评估（eTEAs）

Carbon Capture Science & Technology

Pub Date : 2026-01-07 DOI: 10.1016/j.ccst.2026.100569

Hongkyoung Shin , Juyoung Oh , Yunju Jeon , Youngsub Lim , Thomas A. Adams II

The continuous increase in greenhouse gas (GHG) emissions and the strengthening of environmental regulations have brought Carbon Capture, Utilization, and Storage (CCUS) technology into focus. Most liquefied carbon dioxide carriers (LCO₂Cs) employ liquefied natural gas (LNG) propulsion, but they still emit significant GHG emissions, highlighting the need for further reduction. While boil-off gas (BOG) handling is essential for long-distance LCO₂C operations, no studies have examined onboard carbon capture and storage (OCCS) systems integrated with BOG handling systems. This study evaluates five operational cases—BOG re-liquefaction (RLIQ), OCCS, purge gas recapture, and their combinations—to assess the GHG reduction and economic feasibility of LCO₂Cs. Although standalone RLIQ and OCCS showed similar reduction rates (29% and 30%), the avoidance cost of OCCS alone was more than two times higher. Integrating BOG RLIQ, OCCS, and purge recirculation achieved up to 69% well-to-wake emission reduction with an avoidance cost of $355.9/t_CO₂eq. Therefore, integrating OCCS with BOG RLIQ is the most effective approach for LCO₂Cs. Despite limited competitiveness under current low carbon tax levels, the avoidance cost of $320–416/t_CO₂eq remains favorable compared with other low-carbon technologies such as direct air capture ($500–1100/t_CO₂eq).

温室气体（GHG）排放的持续增加和环境法规的加强使碳捕集、利用和封存（CCUS）技术成为人们关注的焦点。大多数液化二氧化碳运输船（LCO2Cs）采用液化天然气（LNG）推进，但它们仍会排放大量温室气体，因此需要进一步减排。虽然蒸发气（BOG）处理对于长距离LCO2C作业至关重要，但目前还没有研究将BOG处理系统集成在船上的碳捕获和储存（OCCS）系统中。本研究评估了五种操作案例——bog再液化（RLIQ）、OCCS、吹扫气体再捕获及其组合——以评估LCO2Cs的温室气体减排和经济可行性。虽然单独的RLIQ和OCCS显示出相似的降低率（29%和30%），但单独的OCCS的避免成本高出两倍多。整合BOG RLIQ、OCCS和吹扫再循环，可将井尾排放减少69%，避免成本为355.9美元/tCO₂当量。因此，将OCCS与BOG RLIQ集成是lco2c最有效的方法。尽管在目前的低碳税水平下竞争力有限，但与直接空气捕获（500-1100美元/tCO₂当量）等其他低碳技术相比，320-416美元/tCO₂当量的避免成本仍然是有利的。

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引用次数: 0