Carbon Capture Science & Technology最新文献

{"title":"Natural carbonation in alkali basalts: Geochemical evolution of Ca–Mg–Fe carbonates at Sverrefjellet, Svalbard","authors":"Andrea Pierozzi ,&nbsp;Niamh Faulkner ,&nbsp;Adrienn Maria Szucs ,&nbsp;Luca Terribili ,&nbsp;Melanie Maddin ,&nbsp;Federica Meloni ,&nbsp;Kavya Devkota ,&nbsp;Kristina Petra Zubovic ,&nbsp;Paul C. Guyett ,&nbsp;Juan Diego Rodriguez-Blanco","doi":"10.1016/j.ccst.2025.100510","DOIUrl":"10.1016/j.ccst.2025.100510","url":null,"abstract":"<div><div>This study investigates hydrothermal carbonate cements in Quaternary alkali basalts from the Sverrefjellet volcano (Svalbard), offering insights into in-situ natural mineral carbonation. XRD and SEM-BSE-EDS analyses identify two main morphologies, nodular and banded, composed of solid-solution series between magnesite, calcite, and siderite, with distinct compositional zonation. Nodular cements usually show concentric zoning from Mg-rich cores (Ca_0.05Mg_0.95CO₃) to Ca-enriched rims (Ca_0.40Mg_0.60CO₃), reflecting evolving fluid chemistry. Fe-rich nodules (Ca_0.10Mg_0.50Fe_0.40CO₃) are found near pyrite and display dissolution textures linked to localized redox reactions. Banded cements initiate at the basalt interface as Ca-rich proto-dolomite (Ca_0.65–0.58Mg_0.35–0.42CO₃), transitioning outward to magnesite (Ca_0.10Mg_0.90CO₃) and ferroan magnesite (Ca_0.10Mg_0.50Fe_0.40CO₃). Ca/Mg ratios decrease with distance from the interface (1.81 to 0.13), while Fe/Mg exceeds 13.5 locally due to Fe-rich coatings and inclusions. Four sequential crystallization stages were identified: (1) irregularly laminated Ca-Mg carbonates, (2) oscillatory-zoned dolomite-magnesite, (3) radiaxial-fibrous Ca-bearing magnesite, and (4) Fe-oxide-rich nanocrystalline rinds. Basaltic silicate and glass dissolution (forsterite, enstatite, anorthite) supplied divalent cations. Redox shifts promoted Fe incorporation. Early Ca²⁺ depletion altered fluid chemistry toward Mg²⁺ and Fe²⁺, while oscillatory zoning reflects episodic fluid compositional variations. Pyrite and siderite dissolution imply late-stage oxidation and secondary porosity development. These carbonates are hydrothermal in origin, supported by high-temperature phases, fan-like growth textures, and Ca-to-Mg/Fe transitions, consistent with fluid-rock interaction at 60–220 °C and pH 5.2–6.5. The absence of hydrated carbonates and presence of alteration phases also supports hydrothermal precipitation. Comparisons with engineered systems (e.g., CarbFix) underscore the role of temperature in overcoming kinetic barriers to magnesite formation, though metastable proto-dolomite and Mg sequestration in clays reveal limits to carbonation efficiency. These findings constrain predictive models for CO₂ mineralization in basaltic reservoirs, highlighting the interplay of hydrothermal conditions, fluid evolution, and reaction kinetics.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"17 ","pages":"Article 100510"},"PeriodicalIF":0.0,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027390","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":"Accelerating CO2 sequestration in cementitious materials using carbonic anhydrase: Experimental insights into performance and mechanisms","authors":"Xiulin Chen,&nbsp;Zhidong Zhang,&nbsp;Ueli Angst","doi":"10.1016/j.ccst.2025.100511","DOIUrl":"10.1016/j.ccst.2025.100511","url":null,"abstract":"<div><div>Increasing atmospheric CO₂ levels require innovative mitigation strategies. Cementitious materials offer significant potential for CO₂ sequestration through carbonation. This study investigates the application of carbonic anhydrase (CA), an enzyme that catalyzes CO₂ hydration, to accelerate CO₂ sequestration in cementitious materials. We applied pH monitoring and p-NPA assay to evaluate CA activity under artificial cementitious environments. The results showed that CA activity significantly decreased at pH 13 but remained stable at pH below 12, suggesting potential applications of CA in lower-pH systems, such as demolished concrete, mineral waste, or cementitious materials with a low clinker content. Mixing CA directly into fresh cement pastes showed more carbonates formed and a higher reduction in pore volume than the control groups, demonstrating that CA accelerated early-stage CO₂ sequestration. When spraying the CA solution on crushed cement paste, we observed a dense layer of calcite on the surfaces of cement paste particles, meaning that early-stage carbonation resulted in a higher carbonate content than the control samples, particularly for smaller particles with larger surface areas. However, the carbonation efficiency decreased at the later stage, which is likely due to CA deactivation or surface densification limiting ions diffusion, reducing further carbonation enhancement at later stages. This study highlights the potential of CA to accelerate CO₂ sequestration in cementitious materials while emphasizing the challenges of high pH and complex ionic composition for CA performance. The findings suggest the need for stabilizing the enzyme’s activity or applying CA to low-clinker cementitious materials, and partially carbonated materials, such as recycled concrete aggregates, for CO₂ sequestration.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"17 ","pages":"Article 100511"},"PeriodicalIF":0.0,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027389","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":"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":"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":"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":"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}