Carbon Capture Science & Technology最新文献

{"title":"Flexible calcium looping for CO2 capture in electric Arc Furnace steelmaking: A techno-economic analysis","authors":"Néstor D. Montiel-Bohórquez,&nbsp;Manuele Gatti,&nbsp;Matteo C. Romano","doi":"10.1016/j.ccst.2025.100504","DOIUrl":"10.1016/j.ccst.2025.100504","url":null,"abstract":"<div><div>This study presents a techno-economic analysis of four configurations of the Calcium Looping (CaL) technology, tailored to enhance system flexibility for capturing CO₂ from the fluctuating flue gases generated by a scrap-based Electric Arc Furnace with a capacity of 112 t_steel/h. The configurations differ based on the solids circulation strategy between reactors (constant or variable) and the presence of one or two intermediate solids storage vessels. Configurations incorporating intermediate solids storage demonstrated operational advantages, including enhanced process stability and downsized calciner island components. Moreover, the plant configuration with two intermediate solids storages led to the lowest specific fuel consumption of 5.85 MJ per kg_CO2 captured.</div><div>Under the assumptions considered, the CaL system achieved a CO₂ capture rate of 91 % from the EAF off-gas. Moreover, using residual forestry biomass as fuel in the calciner enabled to achieve negative emissions with net CO₂ removal rates of 13-26 t_CO2/h, corresponding to 100-200 kg_CO2 removed per t_steel produced.</div><div>From an economic standpoint, increment in steel cost ranged from 26 to 36 €/t_steel (assuming a carbon tax of 100 €/t_CO2), with costs of CO₂ avoided of 202-255 €/t_CO2.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"17 ","pages":"Article 100504"},"PeriodicalIF":0.0,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Outside Back Cover","authors":"","doi":"10.1016/j.ccst.2025.100515","DOIUrl":"10.1016/j.ccst.2025.100515","url":null,"abstract":"","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"16 ","pages":"Article 100515"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cement and concrete as carbon sinks: Transforming a climate challenge into a carbon storage opportunity","authors":"Liming Huang ,&nbsp;Baodong Li ,&nbsp;Xinping Zhu ,&nbsp;Ning Li ,&nbsp;Xin Zhang","doi":"10.1016/j.ccst.2025.100490","DOIUrl":"10.1016/j.ccst.2025.100490","url":null,"abstract":"<div><div>Cement and concrete, while traditionally recognized as one of the main contributors to anthropogenic CO₂ emissions, also have untapped capacity to serve as substantial carbon sinks. This paper provides a comprehensive perspective on how engineered mineral carbonation can transform cement-based materials into carbon storage systems. We briefly review the fundamental mechanisms of CO₂ storage in cementitious systems and highlight current limitations in understanding of reaction kinetics, end-phase regulation and performance control. The effect of CO₂ uptake on material performance is critically evaluated with respect to the fresh performance, mechanical properties and long-term durability. Emphasis is placed on the valorization of alkaline industrial residues and emerging carbonatable binders, which offer sequestration capacity and sustainable resource use. A strategic roadmap is proposed with integration of scientific innovation, regulatory alignment, and carbon accounting in the life cycle, to accelerate the adoption of carbon-storing concrete. This perspective provides a framework to advance cement and concrete as engineered carbon sinks and supports the transition to a climate-positive construction industry.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"16 ","pages":"Article 100490"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"research progress on the optimization of RWGS catalytic systems and reactors and the integrated technology of CO2 capture and conversion","authors":"Zengli Wang ,&nbsp;Yaheng Pang ,&nbsp;Xiao Wang ,&nbsp;Hong Xu ,&nbsp;Hongxia Guo ,&nbsp;Li Liu ,&nbsp;Haijun xu ,&nbsp;Wenquan Cui ,&nbsp;Xinying Liu","doi":"10.1016/j.ccst.2025.100476","DOIUrl":"10.1016/j.ccst.2025.100476","url":null,"abstract":"<div><div>Global carbon emissions continue to rise, and carbon capture and utilization technologies have become a key path to carbon neutrality. The reverse water gas shift reaction (RWGS) has become a research hotspot in low-carbon conversion due to its ability to efficiently convert CO₂ into CO and thereby synthesize high-value fuels and chemicals. However, it faces bottlenecks such as high energy consumption and poor low-temperature selectivity, which restrict its industrial application. This article systematically reviews the latest progress of RWGS reaction in the resource utilization of CO₂, focusing on reaction mechanism, optimization of catalytic system, reactor innovation and breakthroughs in integrated technology. In the design of catalytic systems, electronic structure regulation, interface and defect engineering significantly enhance the CO₂ conversion rate and product selectivity of thermal catalysis, photocatalysis and other systems. The reactor innovation breaks the thermodynamic equilibrium, optimizes mass transfer and overcomes thermodynamic limitations. The CO₂ capture and conversion integrated technology, through the design of adsorption-catalytic dual-functional materials, couples capture and RWGS reactions, significantly reducing the separation energy consumption and transportation costs of traditional processes. Although there are still challenges in the stability of catalytic materials, adaptability to complex gas sources and large-scale application, in the future, focusing on the development of multifunctional materials, the coupling of clean energy and the analysis of dynamic reaction mechanisms will promote the practical application of RWGS technology in industrial carbon reduction.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"16 ","pages":"Article 100476"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon capture, utilization, and storage for sustainable construction: Insights into CO2 mixing, curing, and mineralization","authors":"Kamran Aghaee","doi":"10.1016/j.ccst.2025.100503","DOIUrl":"10.1016/j.ccst.2025.100503","url":null,"abstract":"<div><div>Given the substantial share of global CO₂ emissions attributable to construction materials, especially cement, there is rising interest in harnessing CO₂ to enhance cementitious composites and generate value‑added products. Strategic carbon capture, utilization, and storage (CCUS) techniques including CO₂ mixing, curing, and mineralization can improve the macro‑mechanical performance and microstructure of cement‑based materials and enable the development of novel binders and construction materials. This article synthesizes current CCUS techniques applicable to construction materials, particularly concrete composites, and elaborates on key parameters affecting their effectiveness. The findings suggest that CO₂ mineralization is more effective than CO₂ mixing and curing, revealing its considerable potential for producing carbon-sink materials from construction and industrial by-products that support circularity through reuse and closing the loop in construction. However, this approach still faces challenges related to scale-up and economic feasibility. This study compares and identifies the optimal implementation conditions to maximize material performance and production efficiency, while also evaluating the economic and environmental impacts of the technologies, with a focus on advancing circularity in construction.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"17 ","pages":"Article 100503"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Machine learning-driven optimization of argon oxygen decarburization slag recycling for enhanced microalgal carbon sequestration","authors":"Wen-Long Xu ,&nbsp;Tian-Ji Liu ,&nbsp;Ya-Jun Wang ,&nbsp;Ya-Nan Zeng ,&nbsp;Liang-Yi Zhang ,&nbsp;Kai-Li Dong ,&nbsp;Yi-Tong Wang ,&nbsp;Jun-Guo Li","doi":"10.1016/j.ccst.2025.100502","DOIUrl":"10.1016/j.ccst.2025.100502","url":null,"abstract":"<div><div>The sustainable management of hazardous argon oxygen decarburization (AOD) slag demands urgent attention owing to its calcium-magnesium-silicon leaching risks in landfill scenarios. This study presents an innovative strategy for waste valorization by repurposing three modified AOD slag variants (raw, aged, and carbonated) as nutrient supplements for <em>Chlorella pyrenoidosa</em> cultivation. Moreover, process parameters in microalgae cultivation, such as algal characteristics and complex operational conditions, will affect its yield and productivity. Traditional methods struggle to enable comprehensive understanding and application. Thus, quantitative prediction was conducted using 96 sets of total CO₂ carbon sequestration data (80% for the training set and 20% for the test set). Combined with three machine learning models and the Shapley Additive explanation (SHAP) algorithm, the intrinsic mechanisms by which five leaching elements (Ca, Mg, Al, Si, and Cr) regulate the efficient carbon sequestration of microalgae were analyzed. Notably, the random forest model excelled well in predicting CO₂ storage and elemental leaching, with performance metrics exceeding 0.87. This approach integrating solid waste recycling, utilization and model development achieves three objectives: (1) establishing a circular economy pathway for metallurgical waste, (2) reducing microalgal cultivation costs through waste-derived nutrient substitution, and (3) providing a machine learning blueprint for hazardous waste valorization process optimization. The research results provide guidance for implementing a sustainable strategy of biocarbon capture while reducing industrial waste.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"17 ","pages":"Article 100502"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization and deactivation mechanisms of molten salt-promoted MgO for intermediate-temperature CO2 capture","authors":"Yaozu Wang ,&nbsp;Yuqi Niu ,&nbsp;Yunrong Zhao ,&nbsp;Bocheng Yu ,&nbsp;Jinyang Xu ,&nbsp;Yongqing Xu ,&nbsp;Shijie Yu ,&nbsp;Xuan Bie ,&nbsp;Qinghai Li ,&nbsp;Yanguo Zhang ,&nbsp;Jingyuan Ma ,&nbsp;Shuzhuang Sun ,&nbsp;Fei Song ,&nbsp;Hui Zhou","doi":"10.1016/j.ccst.2025.100492","DOIUrl":"10.1016/j.ccst.2025.100492","url":null,"abstract":"<div><div>The incorporation of nitrate molten salts has been demonstrated as an effective strategy to enhance the CO₂ uptake of MgO for intermediate-temperature (200–400 °C) CO₂ capture. However, the slow carbonation kinetics in flue gas capture, coupled with poor stability, hinder its industrial application. In this study, the addition of Na₂CO₃ was found to significantly improve the sorption kinetics of MgO in a 15 % CO₂ atmosphere, achieving a CO₂ capacity of 19.9 mmol/g at 275 °C with a 15 mol% total promoter loading (Na₂CO₃/NaNO₃ = 1:4). Mechanistic analysis revealed that Na₂CO₃ promotes the formation of Na₂Mg(CO₃)₂, which acts as an effective nucleation site for MgCO₃ formation, accelerating the carbonation rate by a factor of eight. The Hard X-ray photoelectron spectroscopy (HAXPES) revealed that an increased Na/Mg ratio caused subsurface migration and aggregation of molten salts, leading to a permanent rise in local salt concentrations, which negatively affected CO₂ capture performance. These findings offer valuable insights into the structural degradation mechanisms and provide guidance for enhancing the stability of nitrate-enhanced MgO, thereby improving its potential for intermediate-temperature CO₂ capture.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"17 ","pages":"Article 100492"},"PeriodicalIF":0.0,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uncovering the opportunity space for hybrid CO₂ capture processes: A techno-economic exploration","authors":"Luca Riboldi,&nbsp;Rahul Anantharaman,&nbsp;Donghoi Kim,&nbsp;Rubén M. Montañés,&nbsp;Simon Roussanaly,&nbsp;Sai Gokul Subraveti","doi":"10.1016/j.ccst.2025.100498","DOIUrl":"10.1016/j.ccst.2025.100498","url":null,"abstract":"<div><div>There exists a portfolio of technologies that can be deployed for post-combustion CO₂ capture. Each technology performs optimally at specific conditions, which will hardly coincide with exact industrial applications. Hybrid processes combine two (or more) technologies to perform the CO₂ separation. The goal is to design processes that allow each technology in the hybrid configuration to operate optimally, resulting in cost-effective CO₂ capture solutions. This study explores the feasibility of realizing this potential by mapping the techno-economic potential of selected hybrid processes across a wide spectrum of CO₂ concentrations, plant scales and energy system contexts. The four hybrid processes considered are: vacuum pressure swing adsorption (VPSA)-membrane, membrane-VPSA, VPSA-CO₂ liquefaction and membrane-CO₂ liquefaction. A consistent techno-economic optimization framework is developed to identify the optimal process characteristics and associated minimum cost for each case considered. The performances are compared against those of conventional standalone capture technologies – VPSA, membranes and chemical absorption. Hybrid processes show promising results for medium-to-high CO₂ concentrations (≈13–30 % CO₂), where costs in the range 40–70 €/t_CO2 appear achievable. However, even when different levels of electricity price and emission intensity are considered, chemical absorption and membranes remain the two most cost-efficient processes in most of the cases considered with hybrid processes at least 15 % more expensive. The material properties of membranes and adsorbents proved to have a significant impact on the expected performance. The sensitivity analysis showed how changing material properties assumption within relevant boundaries could modify the relative performance and advance hybrid processes, such as VPSA-membrane, as potentially attractive solutions, with the potential to decrease cost of &gt;10 % at specific industrial conditions.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"17 ","pages":"Article 100498"},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanistic elucidation of cascade CO2 hydrogenation enabled by Cu–Fe interfaces and oxygen vacancies","authors":"Hyeonji Yeom,&nbsp;Yongseok Kim,&nbsp;Woosung Leem,&nbsp;Jongmin Park,&nbsp;Kyungsu Na","doi":"10.1016/j.ccst.2025.100500","DOIUrl":"10.1016/j.ccst.2025.100500","url":null,"abstract":"<div><div>The direct hydrogenation of CO₂ using green hydrogen offers a sustainable route to produce carbon-neutral liquid hydrocarbons, emerging as a viable alternative to conventional naphtha cracking. Although Fe-based CuAl₂O₄ catalysts have been widely studied for CO₂ hydrogenation, the mechanistic role of hydrogen spillover across dynamic Cu–Fe and associated oxygen vacancies has remained elusive. Here, the structure of FeK/CuAl₂O₄ catalysts was systematically tailored by controlling the reduction temperature to elucidate the exsolution-driven restructuration of pristine catalyst structure and its influences on the catalytic performance. We investigated the reaction process using in-situ DRIFTS analysis, from which we for the first time observed a cascade mechanism activated by hydrogen spillover, revealing various elementary reaction steps: (i) preferential adsorption of CO₂ as carbonate species on oxygen vacancies created by Cu exsolution in CuAl₂O₄ lattice, (ii) effective formate-mediated reverse water–gas shift (RWGS) reaction via the hydrogen spillover from exsolved Cu, (iii) promoted Fischer–Tropsch synthesis (FTS) reaction on Fe₅C₂ formed by the facilitated Fe carburization at the exsolved Cu–Fe₃O₄ interfaces, (iv) rapid desorption of hydrocarbons produced via controlled carbon chain growth. This cooperative interaction enabled the selective production of C_5–11 hydrocarbons, achieving the highest C_5–11 productivity of 290.7 mL g_cat^–1 h^–1, surpassing our previous work at a CO₂ conversion of 36.4%. These findings establish a quantitative structure–performance–mechanism relationship and offer design principles for selectivity control toward desired hydrocarbon ranges in multifunctional CO₂ hydrogenation catalysts.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"17 ","pages":"Article 100500"},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144933166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing CO2 storage potential in a structurally complex depleted gas reservoir, offshore South Africa","authors":"S. Mhlambi ,&nbsp;O.E. Eruteya ,&nbsp;F.A. Agbor ,&nbsp;A. Moscariello ,&nbsp;J.M. van Bever Donker ,&nbsp;E. Samankassou","doi":"10.1016/j.ccst.2025.100499","DOIUrl":"10.1016/j.ccst.2025.100499","url":null,"abstract":"<div><div>As global efforts to mitigate greenhouse gas emissions intensify, carbon capture and storage (CCS) has emerged as a key strategy for reducing the environmental impact of fossil fuel use. However, geological storage of CO₂ in structurally complex and heterogeneous reservoirs presents a range of issues due to the geological intricacies, with implications for storage capacity estimation, CO₂ injection, migration, and even long-term containment, which pose environmental risks. Therefore, this study assesses the CO₂ storage potential of the depleted F-O Gas Field in the Bredasdorp Basin, offshore South Africa, using a robust modelling approach based on the analysis of a suite of exploration and production datasets from the field. A high degree of structural compartmentalisation with a fault-bounded anticlinal trap characterises the field. The Valanginian-age marine sandstone reservoirs exhibit low to moderate porosity and permeability. In total, a CO₂ storage capacity of 185.3 Mt was determined for the F-O gas field, which reduces to 37.1–74.1 Mt after accounting for reservoir heterogeneity and sweep efficiency. This reduction reflects the impact of the field's complex structural architecture, variable facies distribution, and petrophysical variability, which collectively limit the effective pore volume accessible for CO₂ storage. By rigorously integrating the structural architecture of the field, sedimentary processes, facies distribution, and petrophysical variability of the candidate reservoir, this study provides critical insights and strategies into the feasibility of CCS in structurally complex depleted gas fields. Significantly, these findings contribute to ongoing national CCS assessments and support South Africa’s long-term decarbonisation agenda.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"17 ","pages":"Article 100499"},"PeriodicalIF":0.0,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}