Carbon Capture Science & Technology最新文献

英文中文

Integrated calcium looping technologies for enhanced CO2 valorisation—A critical review

Carbon Capture Science & Technology

Pub Date : 2025-01-16 DOI: 10.1016/j.ccst.2025.100371

Priyanka Kumari , Nahla Al Amoodi , Ludovic F. Dumée , Ahmed Al Hajaj

The calcium looping (CaL) process stands out as a promising technology for carbon dioxide (CO₂) capture, which exhibits two essential phases: carbonation and calcination. CaL process has several advantages over conventional systems such as availability of abundant and low cost CaO sorbents, reduced environmental impact, lower greenhouse emissions and energy requirements. CaL offers easy and innovative schemes to integrate renewable energy such as concentrated solar power, oxy-fuel and chemical looping process and steam dilution to further enhance the overall efficiency of the system. The review first focuses on summarizing the characteristics and operational parameters of these process integrated CaL facilities while highlighting key experimental findings. The examination of innovative sorbent materials utilized within integrated CaL processes has been addressed, emphasizing pathways directed towards enhancing reaction efficacy, energy conservation, and holistic sustainability attained via process integration and intensification. Meanwhile, strategies to overcome the limitation of CaL process in terms of rapid sintering of sorbent particles over time have also been discussed. Further, the approaches for integrating CaL into industrial plants such as power, cement and steel plants have been identified and compared to realize significant reduction of energy penalty compared to conventional system. The impact of multivariate latent variable (LV) modeling on the integrated CaL process has been examined. Based on the review, CaL showed equivalent or better performance in reducing CO₂ emissions (global warming potential or climate change impact indicator) in comparison to alternative scenarios.

{"title":"Integrated calcium looping technologies for enhanced CO2 valorisation—A critical review","authors":"Priyanka Kumari , Nahla Al Amoodi , Ludovic F. Dumée , Ahmed Al Hajaj","doi":"10.1016/j.ccst.2025.100371","DOIUrl":"10.1016/j.ccst.2025.100371","url":null,"abstract":"<div><div>The calcium looping (CaL) process stands out as a promising technology for carbon dioxide (CO<sub>2</sub>) capture, which exhibits two essential phases: carbonation and calcination. CaL process has several advantages over conventional systems such as availability of abundant and low cost CaO sorbents, reduced environmental impact, lower greenhouse emissions and energy requirements. CaL offers easy and innovative schemes to integrate renewable energy such as concentrated solar power, oxy-fuel and chemical looping process and steam dilution to further enhance the overall efficiency of the system. The review first focuses on summarizing the characteristics and operational parameters of these process integrated CaL facilities while highlighting key experimental findings. The examination of innovative sorbent materials utilized within integrated CaL processes has been addressed, emphasizing pathways directed towards enhancing reaction efficacy, energy conservation, and holistic sustainability attained via process integration and intensification. Meanwhile, strategies to overcome the limitation of CaL process in terms of rapid sintering of sorbent particles over time have also been discussed. Further, the approaches for integrating CaL into industrial plants such as power, cement and steel plants have been identified and compared to realize significant reduction of energy penalty compared to conventional system. The impact of multivariate latent variable (LV) modeling on the integrated CaL process has been examined. Based on the review, CaL showed equivalent or better performance in reducing CO<sub>2</sub> emissions (global warming potential or climate change impact indicator) in comparison to alternative scenarios.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100371"},"PeriodicalIF":0.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enzyme assisted direct air capture of carbon dioxide

Carbon Capture Science & Technology

Pub Date : 2025-01-16 DOI: 10.1016/j.ccst.2025.100369

Agnese Zaghini , Silke Flindt Badino , Stefanie Neun , Peter Westh

Direct air capture (DAC) has been widely advocated as a key tool in the strive towards zero emissions. Here we present the first systematic data on enzyme assisted DAC and show that CO₂ absorption rate tripled upon addition of carbonic anhydrase (CA) at micromolar concentrations, reaching a capture efficiency of 60%. We found that CA promoted high absorption efficiency as the flow rate was raised and we rationalized these observations based on molecular mechanism of enzyme assisted capture. Furthermore, measurements of absorption rates in KOH and carbonate with 1 μM CA showed comparable kinetics suggesting that enzyme application could offset kinetic advantages of hydroxides. These attributes may eventually pave the way for DAC in sorbents with low regeneration energies.

引用次数: 0

Enhancing CO2 sequestration efficiency: A comprehensive study of nanostructured MOF-composite membrane for sustainable climate solution

Carbon Capture Science & Technology

Pub Date : 2025-01-14 DOI: 10.1016/j.ccst.2025.100366

Putu Doddy Sutrisna , Sibudjing Kawi , Khoiruddin Khoiruddin , Pra Cipta W.B. Mustika , Nicholaus Prasetya , I Gede Wenten

This study provides a detailed exploration of nanostructured Metal-Organic Frameworks (MOFs)-composite membranes as a novel and efficient solution for CO₂ sequestration process. The integration of MOFs into membrane systems is shown to significantly enhance gas separation performance by improving both selectivity and permeability, thus addressing the inherent limitations of conventional CO₂ capture technologies. A range of synthesis techniques, including solvothermal synthesis, layer-by-layer assembly, and in-situ growth, are discussed, highlighting their role in optimizing the interaction between MOFs and membrane materials. In addition, the CO₂ capture and separation mechanism through the membrane are thoroughly discussed. The analysis further explores the impact of nanostructuring on the mechanical, chemical, and operational stability of the membranes, with particular attention to their potential for industrial scalability. Key challenges, such as MOF regeneration, economic feasibility, and environmental sustainability, are critically assessed. Additionally, the incorporation of advanced computational modelling and green synthesis methods is emphasized as essential in furthering the development of MOF-composite membranes. This study highlights the significant potential of these advanced materials to revolutionize CO₂ capture technologies, contributing to more sustainable and scalable approaches to climate change mitigation.

{"title":"Enhancing CO2 sequestration efficiency: A comprehensive study of nanostructured MOF-composite membrane for sustainable climate solution","authors":"Putu Doddy Sutrisna , Sibudjing Kawi , Khoiruddin Khoiruddin , Pra Cipta W.B. Mustika , Nicholaus Prasetya , I Gede Wenten","doi":"10.1016/j.ccst.2025.100366","DOIUrl":"10.1016/j.ccst.2025.100366","url":null,"abstract":"<div><div>This study provides a detailed exploration of nanostructured Metal-Organic Frameworks (MOFs)-composite membranes as a novel and efficient solution for CO<sub>2</sub> sequestration process. The integration of MOFs into membrane systems is shown to significantly enhance gas separation performance by improving both selectivity and permeability, thus addressing the inherent limitations of conventional CO<sub>2</sub> capture technologies. A range of synthesis techniques, including solvothermal synthesis, layer-by-layer assembly, and in-situ growth, are discussed, highlighting their role in optimizing the interaction between MOFs and membrane materials. In addition, the CO<sub>2</sub> capture and separation mechanism through the membrane are thoroughly discussed. The analysis further explores the impact of nanostructuring on the mechanical, chemical, and operational stability of the membranes, with particular attention to their potential for industrial scalability. Key challenges, such as MOF regeneration, economic feasibility, and environmental sustainability, are critically assessed. Additionally, the incorporation of advanced computational modelling and green synthesis methods is emphasized as essential in furthering the development of MOF-composite membranes. This study highlights the significant potential of these advanced materials to revolutionize CO<sub>2</sub> capture technologies, contributing to more sustainable and scalable approaches to climate change mitigation.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100366"},"PeriodicalIF":0.0,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physics-based and data-driven hybrid modelling and optimisation of stirred-slurry reactors for CO2 capture via enhanced weathering of dolomite mineral

Carbon Capture Science & Technology

Pub Date : 2025-01-12 DOI: 10.1016/j.ccst.2025.100363

Yalun Zhao , Mingliang Wang , Jin Xuan , Dengao Chang , Ziming Li , Shiyu Wang , Yun Ou , Xu Wang , Lei Xing

The natural enhanced weathering (EW) must be significantly accelerated by optimizing the local triple-phase environment prior to practical large-scale carbon dioxide removal (CDR). The implementation of stirred-slurry reactor (SSR) for enhancing mass transport and reaction rates of the EW-based CO₂ capture process has not yet been reported. We conducted a hybrid modelling approach, in which mechanistic and data-driven models are integrated, for the scaled-up batch SSRs designed for EW-based CO₂ capture. It is revealed that CO₂ mass transport into the aqueous phase has significant impact on the overall capture performance. The scaled-up batch system is found to perform comparably to the continuous system in terms of CO₂ capture rate, energy and water consumption. The energy consumption for gas enrichment in the batch system is expected to be less than 50% of that in continuous systems. Multi-objective optimisation reveals the efficacy and accuracy of the hybrid modeling within low energy consumption ranges.

{"title":"Physics-based and data-driven hybrid modelling and optimisation of stirred-slurry reactors for CO2 capture via enhanced weathering of dolomite mineral","authors":"Yalun Zhao , Mingliang Wang , Jin Xuan , Dengao Chang , Ziming Li , Shiyu Wang , Yun Ou , Xu Wang , Lei Xing","doi":"10.1016/j.ccst.2025.100363","DOIUrl":"10.1016/j.ccst.2025.100363","url":null,"abstract":"<div><div>The natural enhanced weathering (EW) must be significantly accelerated by optimizing the local triple-phase environment prior to practical large-scale carbon dioxide removal (CDR). The implementation of stirred-slurry reactor (SSR) for enhancing mass transport and reaction rates of the EW-based CO<sub>2</sub> capture process has not yet been reported. We conducted a hybrid modelling approach, in which mechanistic and data-driven models are integrated, for the scaled-up batch SSRs designed for EW-based CO<sub>2</sub> capture. It is revealed that CO<sub>2</sub> mass transport into the aqueous phase has significant impact on the overall capture performance. The scaled-up batch system is found to perform comparably to the continuous system in terms of CO<sub>2</sub> capture rate, energy and water consumption. The energy consumption for gas enrichment in the batch system is expected to be less than 50% of that in continuous systems. Multi-objective optimisation reveals the efficacy and accuracy of the hybrid modeling within low energy consumption ranges.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100363"},"PeriodicalIF":0.0,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Covalent organic frameworks (COFs) for CO2 utilizations

Carbon Capture Science & Technology

Pub Date : 2025-01-11 DOI: 10.1016/j.ccst.2025.100365

Maha H. Alenazi , Aasif Helal , Mohd Yusuf Khan , Amjad Khalil , Abuzar Khan , Muhammad Usman , Md. Hasan Zahir

The levels of greenhouse gases, and in particular, carbon dioxide (CO₂) emissions due to anthropogenic activities, have greatly inflated, and this has contributed to climate fluctuation and global warming. In 2023, the CO₂ emissions went up by 1.1 % to arrive at a figure of 37.4 g/t. There is now a good prospect of converting CO₂ into other products, thanks to the active research into the use of COFs for CO₂ capture and conversion. COFs as a new class of porous crystalline materials are synthesized by organic units linked like benzene and triazine, sanines, and porphyrines. Production procedures may result in COFs impurities, therefore, an activation paragraph is required to outweigh the deficiency and improve the efficiency of the COFs. Even though it is difficult to achieve these characteristics in humid conditions where temperature and pressure are in the normal operating conditions of COFs, their low density, highly porous surface areas, large pore volume, and adjustable pore size, all vice versa are effective in carbon capture. This review focuses on the fact that COFs' structural properties are vital to the success of the CO₂ capture and storage processes. It also assesses the possibility of creating cyclic carbonates or other organic compounds to solve environmental issues effectively.

{"title":"Covalent organic frameworks (COFs) for CO2 utilizations","authors":"Maha H. Alenazi , Aasif Helal , Mohd Yusuf Khan , Amjad Khalil , Abuzar Khan , Muhammad Usman , Md. Hasan Zahir","doi":"10.1016/j.ccst.2025.100365","DOIUrl":"10.1016/j.ccst.2025.100365","url":null,"abstract":"<div><div>The levels of greenhouse gases, and in particular, carbon dioxide (CO<sub>2</sub>) emissions due to anthropogenic activities, have greatly inflated, and this has contributed to climate fluctuation and global warming. In 2023, the CO<sub>2</sub> emissions went up by 1.1 % to arrive at a figure of 37.4 g/t. There is now a good prospect of converting CO<sub>2</sub> into other products, thanks to the active research into the use of COFs for CO<sub>2</sub> capture and conversion. COFs as a new class of porous crystalline materials are synthesized by organic units linked like benzene and triazine, sanines, and porphyrines. Production procedures may result in COFs impurities, therefore, an activation paragraph is required to outweigh the deficiency and improve the efficiency of the COFs. Even though it is difficult to achieve these characteristics in humid conditions where temperature and pressure are in the normal operating conditions of COFs, their low density, highly porous surface areas, large pore volume, and adjustable pore size, all vice versa are effective in carbon capture. This review focuses on the fact that COFs' structural properties are vital to the success of the CO<sub>2</sub> capture and storage processes. It also assesses the possibility of creating cyclic carbonates or other organic compounds to solve environmental issues effectively.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100365"},"PeriodicalIF":0.0,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative modeling and assessment of CO2 storage in saline aquifers: A case study in Switzerland

Carbon Capture Science & Technology

Pub Date : 2025-01-10 DOI: 10.1016/j.ccst.2024.100360

Thanushika Gunatilake , Alba Zappone , Yingqi Zhang , Dominik Zbinden , Marco Mazzotti , Stefan Wiemer

The global temperature rise necessitates urgent action to reduce greenhouse gas emissions, with Geological Carbon Storage (GCS) emerging as a promising strategy. GCS involves injecting CO

_{2}

into deep geological formations, particularly saline aquifers. However, ideal reservoir conditions, such as stable caprock and adequate storage capacity, are rare in regions like Switzerland. This study assesses the CO

_{2}

storage potential in the saline aquifer at Triemli, Switzerland, aiming to explore the feasibility of decentralized, small to medium-scale storage with multiple injection points in geologically unfavorable areas. Through numerical simulations, we investigate CO

_{2}

injection, migration, and long-term reservoir stability, bridging the gap between theoretical estimates and practical feasibility. Our findings highlight the potential of deep saline aquifers in the Swiss Molasse Basin and Folded Jura for CO

_{2}

storage, with the study area capable of storing approximately 2 million tons of CO

_{2}

over 30 years. Advanced injection techniques could increase this capacity to 3 million tons. These results underscore the importance of reservoir properties in optimizing CO

_{2}

storage and provide crucial insights for guiding future GCS efforts in Switzerland and beyond, supporting informed decision-making and the implementation of decentralized storage projects.

{"title":"Quantitative modeling and assessment of CO2 storage in saline aquifers: A case study in Switzerland","authors":"Thanushika Gunatilake , Alba Zappone , Yingqi Zhang , Dominik Zbinden , Marco Mazzotti , Stefan Wiemer","doi":"10.1016/j.ccst.2024.100360","DOIUrl":"10.1016/j.ccst.2024.100360","url":null,"abstract":"<div><div>The global temperature rise necessitates urgent action to reduce greenhouse gas emissions, with Geological Carbon Storage (GCS) emerging as a promising strategy. GCS involves injecting CO<span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> into deep geological formations, particularly saline aquifers. However, ideal reservoir conditions, such as stable caprock and adequate storage capacity, are rare in regions like Switzerland. This study assesses the CO<span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> storage potential in the saline aquifer at Triemli, Switzerland, aiming to explore the feasibility of decentralized, small to medium-scale storage with multiple injection points in geologically unfavorable areas. Through numerical simulations, we investigate CO<span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> injection, migration, and long-term reservoir stability, bridging the gap between theoretical estimates and practical feasibility. Our findings highlight the potential of deep saline aquifers in the Swiss Molasse Basin and Folded Jura for CO<span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> storage, with the study area capable of storing approximately 2 million tons of CO<span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> over 30 years. Advanced injection techniques could increase this capacity to 3 million tons. These results underscore the importance of reservoir properties in optimizing CO<span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> storage and provide crucial insights for guiding future GCS efforts in Switzerland and beyond, supporting informed decision-making and the implementation of decentralized storage projects.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100360"},"PeriodicalIF":0.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How to incentive carbon capture and storage technology application in waste-to-energy industry: A facility-level integrated assessment of China

Carbon Capture Science & Technology

Pub Date : 2025-01-09 DOI: 10.1016/j.ccst.2025.100364

Kang Zhou , Jiayue Zhang , Mao Xu

Carbon capture and storage (CCS) technology is crucial for the waste-to-energy (WtE) industry to achieve deep decarbonization goals, especially in China. However, there is a lack of understanding of the potential and costs of CCS technology in the WtE industry, particularly from the perspective of facility. Given with this situation, a facility-level integrated assessment model including CCS source-sink matching optimization model and tech-economic assessment model was developed in this study to reveal the application potential and costs of CCS technology in China's WtE industry, and to quantify the impacts of different incentive policies on CCS technology deployment. The results showed that matching WtE facilities with nearby carbon sinks enables significant CO₂ reductions, ranging from 0.3 Gt annually to a cumulative 6.9 Gt over the facilities’ operational lifetimes. The emission reduction costs for all WtE facilities range from -612.9 to 506.5 CNY/t CO₂, with an average profit of 412.5 CNY/t CO₂ when considering enhanced oil recovery (EOR). However, saline aquifer storage demands robust policy incentives due to limited direct economic benefits. Facilities with larger capacities and longer remaining lifespans are most cost-effective for CCS retrofitting. Spatial analysis underscores geographical disparities in CCS potential, with eastern coastal regions displaying greater feasibility due to higher WtE density and proximity to carbon sinks. Among incentive measures, waste disposal fee subsidies and feed-in tariffs exhibit varying efficiency, while carbon market mechanisms show potential for long-term sustainability. To promote the application of CCS technology and exert its emission reduction effect, a collaborative strategy combining market-driven carbon pricing and government subsidies should be adopted in the future, and priority should be given to the retrofitting of high-capacity and long-life facilities.

{"title":"How to incentive carbon capture and storage technology application in waste-to-energy industry: A facility-level integrated assessment of China","authors":"Kang Zhou , Jiayue Zhang , Mao Xu","doi":"10.1016/j.ccst.2025.100364","DOIUrl":"10.1016/j.ccst.2025.100364","url":null,"abstract":"<div><div>Carbon capture and storage (CCS) technology is crucial for the waste-to-energy (WtE) industry to achieve deep decarbonization goals, especially in China. However, there is a lack of understanding of the potential and costs of CCS technology in the WtE industry, particularly from the perspective of facility. Given with this situation, a facility-level integrated assessment model including CCS source-sink matching optimization model and tech-economic assessment model was developed in this study to reveal the application potential and costs of CCS technology in China's WtE industry, and to quantify the impacts of different incentive policies on CCS technology deployment. The results showed that matching WtE facilities with nearby carbon sinks enables significant CO<sub>2</sub> reductions, ranging from 0.3 Gt annually to a cumulative 6.9 Gt over the facilities’ operational lifetimes. The emission reduction costs for all WtE facilities range from -612.9 to 506.5 CNY/t CO<sub>2</sub>, with an average profit of 412.5 CNY/t CO<sub>2</sub> when considering enhanced oil recovery (EOR). However, saline aquifer storage demands robust policy incentives due to limited direct economic benefits. Facilities with larger capacities and longer remaining lifespans are most cost-effective for CCS retrofitting. Spatial analysis underscores geographical disparities in CCS potential, with eastern coastal regions displaying greater feasibility due to higher WtE density and proximity to carbon sinks. Among incentive measures, waste disposal fee subsidies and feed-in tariffs exhibit varying efficiency, while carbon market mechanisms show potential for long-term sustainability. To promote the application of CCS technology and exert its emission reduction effect, a collaborative strategy combining market-driven carbon pricing and government subsidies should be adopted in the future, and priority should be given to the retrofitting of high-capacity and long-life facilities.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100364"},"PeriodicalIF":0.0,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cyclic effects of sulfur deposition on CO2 by vacuum pressure swing adsorption from blast furnace gas

Carbon Capture Science & Technology

Pub Date : 2025-01-09 DOI: 10.1016/j.ccst.2025.100361

Yangyang Guo , kaige Du , Lei Luo , Shuoguo Gu , Na Geng , Tingyu Zhu

Vacuum pressure swing adsorption has a high potential to reduce CO₂ from blast furnace gas, while there are also H₂S and COS exist in the blast furnace gas, and the sulfur deposition effect on CO₂ adsorption over zeolite was quite necessary to be investigated. In this work, laboratory fixed bed evaluation and two-tower pressure swing adsorption apparatus were employed and it has been found that sulfur deposition occurs only in the presence of coexisting H₂S and O₂ without water and the highest sulfur accumulation is 13.21 % for the adsorbent under CO₂+H₂S+COS+O₂ atmosphere. Cyclic evaluation of H₂S and COS on CO₂ cyclic adsorption was first reported, and the sulfur is ultimately converted into S monomers and sulfate, which can be deposited inside the pore channel, with the specific surface area reduced 82.26 % of the adsorbent. Furthermore, sulfur deposition gradually diffused with the upward shift of the adsorption mass transfer zone, and the sulfur deposition densities are calculated to be approximately 0.34 g/cm³. These mechanisms and data demonstrate the significant impact of sulfur deposition on sustainable CO₂ capture in industrial processes, and provide important guidance for the design of CO₂ capture technologies, which is of great importance for carbon reduction.

{"title":"Cyclic effects of sulfur deposition on CO2 by vacuum pressure swing adsorption from blast furnace gas","authors":"Yangyang Guo , kaige Du , Lei Luo , Shuoguo Gu , Na Geng , Tingyu Zhu","doi":"10.1016/j.ccst.2025.100361","DOIUrl":"10.1016/j.ccst.2025.100361","url":null,"abstract":"<div><div>Vacuum pressure swing adsorption has a high potential to reduce CO<sub>2</sub> from blast furnace gas, while there are also H<sub>2</sub>S and COS exist in the blast furnace gas, and the sulfur deposition effect on CO<sub>2</sub> adsorption over zeolite was quite necessary to be investigated. In this work, laboratory fixed bed evaluation and two-tower pressure swing adsorption apparatus were employed and it has been found that sulfur deposition occurs only in the presence of coexisting H<sub>2</sub>S and O<sub>2</sub> without water and the highest sulfur accumulation is 13.21 % for the adsorbent under CO<sub>2</sub>+H<sub>2</sub>S+COS+O<sub>2</sub> atmosphere. Cyclic evaluation of H<sub>2</sub>S and COS on CO<sub>2</sub> cyclic adsorption was first reported, and the sulfur is ultimately converted into S monomers and sulfate, which can be deposited inside the pore channel, with the specific surface area reduced 82.26 % of the adsorbent. Furthermore, sulfur deposition gradually diffused with the upward shift of the adsorption mass transfer zone, and the sulfur deposition densities are calculated to be approximately 0.34 g/cm<sup>3</sup>. These mechanisms and data demonstrate the significant impact of sulfur deposition on sustainable CO₂ capture in industrial processes, and provide important guidance for the design of CO₂ capture technologies, which is of great importance for carbon reduction.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"14 ","pages":"Article 100361"},"PeriodicalIF":0.0,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of vertical structure type bimetallic MOF@ biomass aerogels for efficient CO2 capture and separation

Carbon Capture Science & Technology

Pub Date : 2025-01-09 DOI: 10.1016/j.ccst.2025.100362

Jianpeng Huang , Yongjuan Wang , Zhipeng Hu , Deshi Yang , Zhijun Zhang , Fengqiang Wang , Yanjun Xie , Qingwen Wang

Effectively capturing carbon dioxide (CO₂) is crucial for environmental protection. In this research, we synthesized a composite aerogel (CSA-n) by integrating a bimetallic metal-organic framework (Mg/Co-MOF-74) with biomass materials (cellulose/chitosan) using an in situ mineralization approach. This composite aerogel exhibited enhanced CO₂ adsorption capabilities than pure biomass aerogel. At 298 K and 100 KPa, the CO₂ adsorption capacity of CSA-3 reached 6.4 mmol/g, an increase of 16.4 % compared to pure MOF. The significant improvement of CO₂ uptakes could be attributed to the more complex pore structure of the composite aerogel compared to pure MOF. Additionally, simulations based on the ideal adsorption solution theory (IAST) showed that the separation factors of CSA-3 for CO₂/N₂ and CO₂/CH₄ gas mixtures were 594.3 and 43.4, respectively. Furthermore, the composite aerogel exhibited excellent cyclic stability. After 10 cycles, the CO₂ adsorption capacity of CSA-3 remained at 96.8 %. The results suggest that this bimetallic metal-organic framework @biomass hybrid aerogel holds great potential for CO₂ adsorption and separation applications.

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引用次数: 0

Enhancing energy efficiency and decarbonization of cement production through integrated calcium-looping and methane dry reforming (CaL-DRM) for in-situ CO2 conversion to syngas

Carbon Capture Science & Technology

Pub Date : 2025-01-01 DOI: 10.1016/j.ccst.2024.100359

Fangshu He , Jiaomei Ma , Qiang Hu , Jiashuo Wang , Yingquan Chen , Haiping Yang , Yang Yang

The cement industry is exceptionally energy-intensive and a major global carbon emitter, with CO₂ primarily arising from the calcination of carbonate raw meal and the combustion of fossil fuels. This study proposes a novel process integrating calcium looping and dry reforming of methane (CaL-DRM) based on an “in-situ carbon capture and conversion” strategy to enhance the energy efficiency and decarbonization in the cement production process. Models for both conventional cement production process model and the CaL-DRM processes were developed using Aspen Plus to compare the mass flow and process energy balances of conventional cement production with the CaL-DRM process. The modelling results were validated by the cement plant operating data and published results. Sensitivity analyses were performed to optimize key production parameters, including CH₄/O₂ = 1.37 and CaCO₃/CH₄ = 0.5, which resulted in the highest conversion efficiencies of CO₂ and CH₄. Subsequently, the optimization of the tertiary air volume and the proportion of hot raw meal entering the carbonator was carried out. The optimal tertiary air volume was found to be less than 28529 Nm³/h, and 13% of the hot raw meal was directed to the carbonator. With these conditions, the process thermal efficiency can be increased from 58 % to 86 %. CO₂ emissions were analyzed at key stages of cement production process, focusing on fuel combustion and carbonate decomposition at the calciner and rotary kiln, with a comparison of the conventional method and the CaL-DRM process to quantify emissions at each stage. The results indicate that 852.3 kg CO₂ per ton of cement clinker can be converted to produce 1680 kg of syngas per ton of cement clinker along with cement clinker. Additionally, up to 62.5 kg CO₂ per ton of cement clinker can be captured by the carbonator, reducing the CO₂ volume fraction in flue gas from 23.29 % to 0.24 %, thus eliminating the need for subsequent CO₂ purification and transport. These findings demonstrate the significant potential of this novel method for sustainable development in the cement industry.

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