Journal of CO2 Utilization最新文献_第2页

Thermodynamic analysis of CO2 methanation for power-to-gas applications: Impact of in-situ water removal on performances and heat release 动力制气应用中CO2甲烷化的热力学分析：原位除水对性能和热释放的影响

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-09-19 DOI: 10.1016/j.jcou.2025.103226

S.G. Acierno, C. Finelli, A. Lancia, A. Erto

{"title":"Thermodynamic analysis of CO2 methanation for power-to-gas applications: Impact of in-situ water removal on performances and heat release","authors":"S.G. Acierno, C. Finelli, A. Lancia, A. Erto","doi":"10.1016/j.jcou.2025.103226","DOIUrl":"10.1016/j.jcou.2025.103226","url":null,"abstract":"<div><div>This study presents a comprehensive thermodynamic analysis of CO₂ methanation, aimed at identifying optimal operating conditions for a reaction governed by a complex network. Simulations were performed in Aspen Plus® using Gibbs free energy minimization. Key variables were systematically investigated, including temperature (200–500 °C), pressure (1, 5, 10 and 30 atm), and H<sub>2/</sub>CO<sub>2</sub> molar ratio (2:1, 4:1, 6:1). A special attention is given to selective water removal, analyzed across a full range (0–100 %) to simulate sorption-enhanced and membrane reactor systems. For these scenarios, the H<sub>2/</sub>CO<sub>2</sub> ratio was fixed at 4:1 to reflect typical conditions. Given the exothermic nature of CO<sub>2</sub> hydrogenation, a thermal analysis was also performed to estimate heat release and assess the feasibility of thermoneutral operation. This was evaluated over an extended temperature range (200–700 °C) and the same pressures and feed ratios, providing insights into energy efficiency and operational stability.</div><div>Results show that water removal strongly shifts the thermodynamic equilibrium, significantly increasing CO<sub>2</sub> conversion and CH<sub>4</sub> selectivity up to a critical point, beyond which coke formation becomes favorable. The location of this optimum is highly sensitive to temperature and pressure, highlighting the need for strict operational control. Corresponding variations in the reaction heat profile further emphasize these dependencies. Overall, this work offers a detailed thermodynamic perspective on a kinetically complex system, identifies favorable operating windows and highlights process limitations. These findings complement existing literature and provide valuable guidance for the design and optimization of CO<sub>2</sub> methanation technologies.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103226"},"PeriodicalIF":8.4,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145098247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metal-free conversion of CO2 to non-isocyanate polyurethane for solid amine sorbent pellets design for CO2 capture 无金属二氧化碳转化为非异氰酸酯聚氨酯固体胺吸附剂颗粒设计的二氧化碳捕获

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-09-19 DOI: 10.1016/j.jcou.2025.103228

Faranak Heshmatnia, Zahra Eshaghi Gorji, Nguyan Gia Huy, Baljeet Singh, Timo Repo

引用次数: 0

Ceria-doped UiO-66-derived carbon–zirconia supported vanadium catalysts for CO2-ODHP: Synergistic effects of MSI tuning, oxygen vacancies, and spillover behavior 二氧化硅掺杂uio -66衍生碳-氧化锆负载的CO2-ODHP钒催化剂：MSI调整、氧空位和溢出行为的协同效应

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-09-19 DOI: 10.1016/j.jcou.2025.103229

Zahra Mokhtari, Jafar Towfighi Darian, Masoud Safari Yazd

{"title":"Ceria-doped UiO-66-derived carbon–zirconia supported vanadium catalysts for CO2-ODHP: Synergistic effects of MSI tuning, oxygen vacancies, and spillover behavior","authors":"Zahra Mokhtari, Jafar Towfighi Darian, Masoud Safari Yazd","doi":"10.1016/j.jcou.2025.103229","DOIUrl":"10.1016/j.jcou.2025.103229","url":null,"abstract":"<div><div>In this study, a series of zirconia-supported vanadium oxide catalysts—VZ (V<sub>2</sub>O<sub>5</sub>@ZrO<sub>2</sub>), VZC (V<sub>2</sub>O<sub>5</sub>@ZrO<sub>2</sub>/C, UiO-66-derived), and Ce-VZC (Ce-doped-V<sub>2</sub>O<sub>5</sub>@ZrO<sub>2</sub>/C)—were synthesized and systematically evaluated for the CO<sub>2</sub>-assisted oxidative dehydrogenation of propane (ODHP). The incorporation of a carbonaceous framework derived from UiO-66 and the strategic doping of ceria were employed to optimize metal-support interactions (MSI), enhance oxygen vacancy formation, and promote the spillover of key intermediates. A comprehensive characterization strategy—including XRD, FT-IR, HR-XPS, FE-SEM/EDS, BET, H<sub>2</sub>-TPR, and H<sub>2</sub>/CO<sub>2</sub>-TPD—combined with DFT calculations was undertaken to correlate structure–property–performance relationships. The results reveal that Ce-VZC exhibited the highest surface basicity, active site dispersion, reducibility, and oxygen vacancy concentration, all of which translated into superior catalytic performance and stability. DFT calculations confirmed the lowered energy barriers for propane dehydrogenation and CO<sub>2</sub> activation in Ce-VZC, while also demonstrating moderated MSI and longer spillover distances of H, O, and CO<sub>2</sub> species. Among the catalysts, Ce-VZC achieved the highest propane conversion (19.3 %) and propylene yield (13.9 %) with excellent stability over 600 min of time-on-stream. This work highlights the synergistic effect of ceria doping and carbon integration in tuning MSI, redox properties, and intermediate spillover, offering a promising route toward the rational design of high-performance ODHP catalysts.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103229"},"PeriodicalIF":8.4,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145098250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Paradigmatic demonstration of sonochemical carbon dioxide reduction proceeded over Cu-based catalysts 在cu基催化剂上进行了声化学二氧化碳还原的范例演示

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-09-19 DOI: 10.1016/j.jcou.2025.103220

Dong Xia , Yi Qin , Yagya N. Regmi , Laurie A. King , James Kwan

{"title":"Paradigmatic demonstration of sonochemical carbon dioxide reduction proceeded over Cu-based catalysts","authors":"Dong Xia , Yi Qin , Yagya N. Regmi , Laurie A. King , James Kwan","doi":"10.1016/j.jcou.2025.103220","DOIUrl":"10.1016/j.jcou.2025.103220","url":null,"abstract":"<div><div>Sonochemical carbon dioxide (CO<sub>2</sub>) reduction represents a promising decarbonization technology. However, relevant studies regarding the usage of solid catalysts in sonochemical reactor are rare. Herein, we investigate four distinct highly nanostructured cuprous oxides and sulfides for sonochemical CO<sub>2</sub> reduction via ultrasound-induced cavitation. Specifically, we investigate Cu<sub>2</sub>O cubes, Cu<sub>7</sub>S<sub>4</sub>/Cu<sub>2</sub>O cubes, Cu<sub>7</sub>S<sub>4</sub> cages and Cu<sub>7</sub>S<sub>4</sub> sheets morphologies. Each nanostructure is found to produce CO and H<sub>2</sub> in various ratios ranging from 1.0 – 2.3. Through a systematic study, we investigate the role of different acoustic conditions on affecting CO<sub>2</sub> sonolysis, involving the measurements in CO<sub>2</sub>-saturated H<sub>2</sub>O, 5 %CO<sub>2</sub>/Ar-saturated H<sub>2</sub>O, N<sub>2</sub>-saturated H<sub>2</sub>O, 5 %CO<sub>2</sub>/N<sub>2</sub>-saturated H<sub>2</sub>O and CO<sub>2</sub>-saturated KHCO<sub>3</sub>. We show that Cu<sub>2</sub>O cubes have the highest CO<sub>2</sub>-to-CO conversion (up to 4286.4 μmol·L<sup>−1</sup>·g<sup>−1</sup>·h<sup>−1</sup>) in 5 %CO<sub>2</sub>/Ar-saturated H<sub>2</sub>O. In addition, the as-synthesized Cu<sub>2</sub>O cubes exhibited promising sonochemical stability, with CO and H<sub>2</sub> production rates stabilizing at around 890.3 μmol·L<sup>−1</sup>·g<sup>−1</sup>·h<sup>−1</sup> and 966.9 μmol·L<sup>−1</sup>·g<sup>−1</sup>·h<sup>−1</sup>, respectively. Post sonochemical analysis indicated that the Cu<sub>2</sub>O cubes maintain relatively high CO<sub>2</sub>-to-CO conversion, as well as their morphology. This work provides the first proof-of-concept demonstration of using inexpensive Cu-based catalysts to enable low-carbon sonochemical CO<sub>2</sub> reduction.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103220"},"PeriodicalIF":8.4,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145098248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the solubility potential of anti-cancer and supportive agents in supercritical CO2 through advanced computational intelligence techniques 通过先进的计算智能技术探索抗癌和支持剂在超临界CO2中的溶解度潜力

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-09-19 DOI: 10.1016/j.jcou.2025.103227

Reza Soleimani , Mandana Moradi Kouchi , Ziba Behtouei , Zahra Ghasemi , Alireza Baghban

{"title":"Exploring the solubility potential of anti-cancer and supportive agents in supercritical CO2 through advanced computational intelligence techniques","authors":"Reza Soleimani , Mandana Moradi Kouchi , Ziba Behtouei , Zahra Ghasemi , Alireza Baghban","doi":"10.1016/j.jcou.2025.103227","DOIUrl":"10.1016/j.jcou.2025.103227","url":null,"abstract":"<div><div>The accurate prediction of solid drug solubility in supercritical carbon dioxide (SC-CO₂) is critical for optimizing pharmaceutical processes, especially in environmentally sustainable drug formulation and purification. This study develops a machine learning (ML) framework for predicting solubility in SC-CO₂ using 744 experimental data points (520 training, 112 validation, 112 testing). Four features—melting point, molecular weight, pressure, and temperature—were used as model inputs. A comparative assessment was performed between conventional regression methods (Linear, Ridge, Lasso, Elastic Net) and advanced ML algorithms, including Support Vector Machine, K-Nearest Neighbors, Decision Tree, Random Forest, Gradient Boosting, XGBoost, LightGBM, CatBoost, Gaussian Process Regression, Artificial Neural Networks, and Convolutional Neural Networks (CNN). The results show that tree-based ensembles and deep learning approaches significantly outperform linear models. Notably, the CNN model achieved the best test performance with R² = 0.9839 and MSE = 0.0800, followed by CatBoost (R² = 0.9795) and Gaussian Process Regression (R² = 0.9751). Feature importance analysis using SHAP revealed molecular weight as the most influential variable, followed by pressure, temperature, and melting point. Overall, this study highlights the potential of ML in improving solubility prediction and supports its application in early-stage drug development and green pharmaceutical processing.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103227"},"PeriodicalIF":8.4,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145098251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Net-zero sustainable aviation fuel (SAF) production via CO2 hydrogenation in low-temperature Fischer-Tropsch synthesis: Process design and alternatives 在低温费托合成中通过二氧化碳加氢生产净零可持续航空燃料（SAF）：工艺设计和替代品

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-09-18 DOI: 10.1016/j.jcou.2025.103225

Luis Vaquerizo, Diego Rego-Fernández

{"title":"Net-zero sustainable aviation fuel (SAF) production via CO2 hydrogenation in low-temperature Fischer-Tropsch synthesis: Process design and alternatives","authors":"Luis Vaquerizo, Diego Rego-Fernández","doi":"10.1016/j.jcou.2025.103225","DOIUrl":"10.1016/j.jcou.2025.103225","url":null,"abstract":"<div><div>Sustainable Aviation Fuel (SAF) is fundamental for decarbonizing the aviation sector, which remains one of the hardest industries to electrify. Among the available production routes, SAF derived from indirect CO₂ hydrogenation stands out as a promising alternative, delivering drop-in fuels compatible with existing infrastructure. This work presents and compares three thermally self-sufficient process alternatives for SAF production from captured CO₂, green hydrogen, and renewable electricity. The base case follows a conventional configuration consisting of Reverse Water Gas Shift (RWGS), Fischer-Tropsch (FT), hydrocracker, and Auto-Thermal Reformer (ATR) reactors. The first alternative replaces the ATR with two furnaces and substitutes the PSA-based CO₂ separation with an amine absorption unit. It also includes an isomerization bed to reduce SAF’s freezing point, a Dividing Wall Column (DWC) for efficient separation, and a steam turbine to recover part of the plant’s power demand. The second alternative retains the ATR while integrating CO₂ capture, the isomerization bed, and the DWC. The analysis shows that maintaining the ATR reactor reduces hydrogen consumption (0.52 kg H₂ per kg of products in the second alternative), being economically more favorable (3.65 €/L of SAF) than minimizing power consumption (716 kWh per ton of products in the first alternative), given the high cost of electrolytic hydrogen. In addition, the DWC proves to be the most efficient separation option, requiring the lowest reboiler duty and the fewest trays. All process configurations produce water as the only byproduct (approximately 3.3 kg H₂O/kg products), and achieve net-negative greenhouse gas emissions of up to −2 kg CO₂eq per kg of product.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103225"},"PeriodicalIF":8.4,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145098246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols 绿色氧化铜光电阴极利用植物提取物的有效光电化学二氧化碳转化为醇

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-09-18 DOI: 10.1016/j.jcou.2025.103222

Amena Mrabet , Ivan Merino-Garcia , Maite Perfecto-Irigaray , Garikoitz Beobide , Mohamed Khaddor , Jonathan Albo

{"title":"Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols","authors":"Amena Mrabet , Ivan Merino-Garcia , Maite Perfecto-Irigaray , Garikoitz Beobide , Mohamed Khaddor , Jonathan Albo","doi":"10.1016/j.jcou.2025.103222","DOIUrl":"10.1016/j.jcou.2025.103222","url":null,"abstract":"<div><div>In this study, green home-made synthesized copper oxide (CuO) nanoparticles are employed as photocathodes in the form of gas diffusion electrodes (GDEs) for the continuous photoelectrochemical (PEC) conversion of CO<sub>2</sub> into valuable products, including methanol and ethanol. CuO nanoparticles synthesized using plant extracts from <em>Salvia rosmarinus</em> (CuO-R), <em>Laurus nobilis</em> (CuO-L), and <em>Origanum vulgare</em> (CuO-O) are prepared in a green, sustainable manner, leveraging the phytochemicals in these plants for nanoparticle formation and stabilization. The eco-friendly synthesized CuO-based photocathodes are then prepared by an automated spray pyrolysis deposition technique and comprehensively physico-chemically, optically, and photoelectrochemically characterized, revealing enhanced photocurrent densities and promising product selectivity for CO<sub>2</sub> reduction to alcohols under visible light irradiation. Among the eco-synthesized photocathodes, CuO-R exhibited the highest PEC activity, achieving a Faradaic efficiency exceeding 66 % for methanol, with an energy efficiency of 39.2 %, while requiring a minimized external potential of −0.37 V (vs. RHE), lower than that for the chemically synthesized catalyst (CuO-P). Post-reaction analysis further confirmed that CuO-R maintained its structural integrity after continuous operation, reinforcing its superior stability and PEC efficiency. These results demonstrate that green synthesis pathways provide a sustainable and efficient approach to developing high-performance photocathodes for PEC CO<sub>2</sub> reduction, offering promising potential for scalable solar-driven carbon conversion technologies.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"101 ","pages":"Article 103222"},"PeriodicalIF":8.4,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficiency comparison of novel [bmim][TCM] ionic liquid and MDEA amine solution for the capture of CO2 inside membrane contactor using CFD technique 基于CFD技术的新型[bmim][TCM]离子液体与MDEA胺溶液捕集膜内CO2的效率比较

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-09-18 DOI: 10.1016/j.jcou.2025.103219

Hashem O. Alsaab , Mahboubeh Pishnamazi

{"title":"Efficiency comparison of novel [bmim][TCM] ionic liquid and MDEA amine solution for the capture of CO2 inside membrane contactor using CFD technique","authors":"Hashem O. Alsaab , Mahboubeh Pishnamazi","doi":"10.1016/j.jcou.2025.103219","DOIUrl":"10.1016/j.jcou.2025.103219","url":null,"abstract":"<div><div>Detrimental impacts of greenhouse contaminants’ emission (particularly CO<sub>2</sub>) to the atmosphere have recently endangered ecosystems, human well-beings and economies worldwide. This paper aims to employ a numerical simulation to evaluate the efficiency of 1-Butyl-3-methylimidazolium tricyanomethanide ([bmim][TCM]) ionic liquid (IL) and methyldiethanolamine (MDEA) amine solution for capturing CO<sub>2</sub> inside the hollow fiber membrane contactors (HFMCs). Moreover, mapped meshing technique is utilized to compartmentalize the geometries of module into smaller dimensions to enhance the accuracy and reduce the discrepancy among the results. The validation of simulation has been performed via their comparison with experimental data. With the average relative deviation of almost (ARD) of almost 5 % between the simulation findings and experimental data, model validation has been corroborated. Additionally, this research studies the effects of some parameters including the velocity of gas mixture, module length and porosity on the capture yield of CO<sub>2</sub>.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"102 ","pages":"Article 103219"},"PeriodicalIF":8.4,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145098245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing CO2 absorption efficiency using carbonic anhydrase in MDEA-based hollow fibre membrane contactors 利用碳酸酐酶提高mdea基中空纤维膜接触器的CO2吸收效率

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-09-16 DOI: 10.1016/j.jcou.2025.103224

Mohamed Nadir Khelifi , Ouacil Saouli , Lokmane Abdelouahed , Alain Ledoux , Manawwer Alam , Byong-Hun Jeon , Hyun-Jo Ahn , Yacine Benguerba

{"title":"Enhancing CO2 absorption efficiency using carbonic anhydrase in MDEA-based hollow fibre membrane contactors","authors":"Mohamed Nadir Khelifi , Ouacil Saouli , Lokmane Abdelouahed , Alain Ledoux , Manawwer Alam , Byong-Hun Jeon , Hyun-Jo Ahn , Yacine Benguerba","doi":"10.1016/j.jcou.2025.103224","DOIUrl":"10.1016/j.jcou.2025.103224","url":null,"abstract":"<div><div>Global warming, driven by greenhouse gases such as carbon dioxide (CO<sub>2</sub>), leads to rising global temperatures and climate disruption. CO<sub>2</sub>, a major contributor to the greenhouse effect, is a critical focus for mitigating climate change through innovative capture and reduction technologies. This paper presents a comprehensive study on the mass transfer simulation of CO<sub>2</sub> absorption in a hollow-fibre membrane contactor, utilising chemical and Multiphysics modules for mass transfer and reacting flow within COMSOL software. Theoretical simulations were performed to investigate the absorption process and assess the potential of membrane contactors as an effective strategy for intensified CO<sub>2</sub> capture through gas-liquid absorption. The study features an advanced model designed to explore the impact of incorporating human carbonic anhydrase (hCA) with <em>n-methyldiethanolamine</em> (MDEA) solvent in a counter-current hollow fibre membrane contactor. It is demonstrated that hCA with MDEA enhances CO<sub>2</sub> absorption by 34 % compared to MDEA due to its high reaction rate. Key operational parameters, such as gas flow rates and thickness, are investigated, and a decrease in CO<sub>2</sub> absorption efficiency is observed with these parameters. However, the membrane porosity, fibre length, liquid flow rate, number of fibres, and solvent concentration all contribute to the increased efficiency of absorption. The solvent concentration is analysed to evaluate its impact on mass transfer during CO<sub>2</sub> absorption. This integration of the enzyme represents an innovative approach in green chemistry, offering a more sustainable and environmentally friendly solution for CO<sub>2</sub> capture.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"101 ","pages":"Article 103224"},"PeriodicalIF":8.4,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanism-driven optimization of CO2 flooding in fractured low-permeability reservoirs: Synergistic insights from 2D visual model and nanoscale lattice Boltzmann simulations 裂缝性低渗透油藏CO2驱油机理优化：2D可视化模型和纳米晶格Boltzmann模拟的协同见解

IF 8.4 2区工程技术

Journal of CO2 Utilization Pub Date : 2025-09-16 DOI: 10.1016/j.jcou.2025.103223

Pengwei Fang , Yidi Wan , Zhengming Yang , Qun Zhang , Weifeng Lv , Hongwei Yu , Meiwen Cao

{"title":"Mechanism-driven optimization of CO2 flooding in fractured low-permeability reservoirs: Synergistic insights from 2D visual model and nanoscale lattice Boltzmann simulations","authors":"Pengwei Fang , Yidi Wan , Zhengming Yang , Qun Zhang , Weifeng Lv , Hongwei Yu , Meiwen Cao","doi":"10.1016/j.jcou.2025.103223","DOIUrl":"10.1016/j.jcou.2025.103223","url":null,"abstract":"<div><div>Fractured low-permeability reservoirs suffer from severe gas channeling and inefficient hydrocarbon mobilization during CO<sub>2</sub>-enhanced oil recovery (CO<sub>2</sub>-EOR). Here, we present a combined experimental and multiscale numerical strategy to unravel CO<sub>2</sub> migration mechanisms and optimize recovery. A novel 2D visualized fracture-matrix physical model is designed to dynamically track CO<sub>2</sub>-oil front propagation under varying injection-production rates (IPR), revealing that an optimal IPR of 0.3 mL/min maximizes sweep efficiency (77 %) and oil recovery (54.1 %). Deviations from this rate exacerbate gas channeling (high IPR) or limit matrix sweep (low IPR). Furthermore, we develop a breakthrough lattice Boltzmann method (LBM) framework integrating a confinement-adapted Peng-Robinson equation of state and dynamically updated fluid-solid interactions to simulate multicomponent transport in dual-porosity-microfracture matrix (DIMM) models. Simulations reveal that wider microfractures accelerate CO2 saturation but intensify bypassing, whereas narrower fractures promote uniform displacement while delaying diffusion. Crucially, microfracture width dictates hydrocarbon mobilization: medium hydrocarbons (C<sub>m</sub>) exhibit width-dependent retention (narrow) vs. efficient extraction (wide), whereas light hydrocarbons (C<sub>L</sub>) remain unaffected. This work provides a predictive toolkit for CO<sub>2</sub>-EOR optimization in complex fractured reservoirs, bridging pore-scale physics to field-scale performance while advancing carbon sequestration strategies.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"101 ","pages":"Article 103223"},"PeriodicalIF":8.4,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0