Article(id=1320090093466006364, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1320090049606172775, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20240599, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1726588800000, receivedDateStr=2024-09-18, revisedDate=1730044800000, revisedDateStr=2024-10-28, acceptedDate=null, acceptedDateStr=null, onlineDate=1792663604369, onlineDateStr=2026-10-22, pubDate=1747670400000, pubDateStr=2025-05-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792663604369, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792663604369, creator=13701087609, updateTime=1792663604369, updator=13701087609, issue=Issue{id=1320090049606172775, tenantId=1146029695717560320, journalId=1263187385517883426, year='2025', volume='53', issue='5', pageStart='1031', pageEnd='1402', issueExtLink='null', onlineDate='null', pubDate='1747670400000', pubDateStr='2025-05-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792663593913, creator='13701087609', updateTime=1792663765419, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1320090769013190788, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1320090049606172775, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1320090769013190789, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1320090049606172775, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1258, endPage=1268, ext={EN=ArticleExt(id=1320090093797356381, articleId=1320090093466006364, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Research Progress on CO2 Capture in Cement Kiln Flue Gas and Modification of Absorption Efficiency of Calcium Carbide Slag, columnId=1263922772401635899, journalTitle=Journal of the Chinese Ceramic Society, columnName=Review, runingTitle=null, highlight=null, articleAbstract=

Carbon dioxide emissions from cement kiln flue gas constitute a significant contributor to global climate change and environmental pollution. As global emission reduction targets progress, research and application of carbon capture, utilization, and storage (CCUS) technologies have increasingly become critical strategies for mitigating CO2 emissions. Among these technologies, the calcium cycle method demonstrates substantial potential due to its low cost, high efficiency in CO2 trapping, and broad applicability, particularly in the context of cement kiln flue gas. However, traditional calcium-based materials, such as limestone, face challenges including high precalcination temperatures and resource wastage, highlighting the need for more efficient and sustainable alternatives.

Calcium carbide slag, an industrial by-product, has shown significant promise as a material for the calcium cycle method. It contains a high proportion of reactive CaO, along with inert components such as alumina and magnesium oxide. These inert components enhance resistance to sintering after preburning. However, repeated use of calcium carbide slag leads to pore structure collapse, particle agglomeration, and sintering, severely diminishing its adsorption performance and posing a significant barrier to practical application.

To address these challenges, various modification techniques have been explored to improve the absorption efficiency and sintering properties of calcium carbide slag, as well as to mitigate the impact of SO2 and NOx in flue gas on CO2 absorption.

Organic acid modification has been identified as an effective strategy to enhance the adsorption performance of calcium carbide slag. Through reactions with calcium hydroxide to form organic calcium salts, pyrolysis at high temperatures releases small molecules that disrupt the original structure of the slag. This process increases porosity, specific surface area, and CO2 adsorption capacity. Different organic acids, due to their distinct molecular structures, yield variations in the molecular weight of organic calcium salts and the types and quantities of small molecules released during pyrolysis. Consequently, modifying calcium carbide slag with specific organic acids allows tailoring of its pore structure to enhance CO2 adsorption performance.

Doping modification technology is another effective approach. By incorporating various substances into the slag, the properties of calcium carbide slag can be optimized through different chemical reaction mechanisms. Inert materials serve as structural frameworks, inhibiting CaO grain migration and growth to improve anti-sintering performance. Doping with oxygen-deficient materials facilitates CO2 diffusion and O2- migration, while potassium and sodium salts increase defect concentrations in the CaCO3 product layer, enabling more efficient Ca2+ migration and enhanced CO2 absorption.

Hydration processes also play a critical role in influencing sintering. While CaCO3 typically decomposes at high temperatures, introducing water vapor during calcination reduces the partial pressure of CO2, promoting its conversion to CaO. Water vapor also shortens decomposition residence time and slows sintering, delaying sintering deactivation and improving stability. By optimizing calcination temperatures and water vapor concentrations, the CO2 adsorption performance and stability of calcium carbide slag can be enhanced over multiple cycles.

In the context of cement kiln flue gas treatment, SO2 and NOx pose additional challenges to the CO2 trapping performance of calcium carbide slag. SO2, being strongly acidic, preferentially reacts with CaO to form dense CaSO4 layers, which accumulate over cycles, diminishing adsorbent activity. Research suggests that specific modification methods or adjustments in the absorption sequence (e.g., absorbing CO2 before SO2) can mitigate these effects. Regarding NOx, calcium carbide slag inherently lacks reductive properties and cannot remove NOx through traditional calcium cycle methods. Doping with reducing substances, such as copper, iron, and other metal oxides, can enable NOx reduction by promoting reactions that convert NOx into harmless nitrogen and oxygen.

Summary and prospects

The future of calcium carbide slag modification technology is expected to move towards systematic and refined strategies. These strategies can leverage the synergistic effects of multiple modification techniques to optimize performance across different reaction stages. As research progresses, the multifaceted applications of calcium carbide slag will gain increasing recognition. Beyond its role in CO2 capture, it holds significant potential for processes such as desulfurization and nitrogen removal.

From an environmental perspective, utilizing calcium carbide slag addresses resource wastage while aiding the cement industry in achieving a green transformation by reducing greenhouse gases and pollutants such as CO2, SO2, and NOx. Continuous innovation in modification technology will ensure that calcium carbide slag not only plays a pivotal role in CO2 capture but also in mitigating pollutants, contributing to the attainment of global emission reduction goals. The enhanced versatility and cyclic stability of modified calcium carbide slag will further support the green transition of the cement industry and other high-emission sectors, contributing to efforts toward a sustainable future.

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WANG Yali (1978-), female, Ph.D., Professor. E-mail:

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目前,水泥窑烟气中CO2的捕集依旧是个难题。本文以钙基吸收法为机理,针对C-电石渣作为替代钙源多次钙循环后的易烧结、吸收效率下降等问题,综述了目前提高电石渣吸收效率和改善烧结性的不同方法,以及水泥窑烟气中其它组分对CO2捕集的影响。已有研究表明有机酸改性可以分解有机酸钙从而获得更好的表面结构,掺杂改性可以减缓颗粒的团聚,水合作用可以降低分压,减缓烧结。水泥窑烟气中的SO2会因为较强的酸性优先与电石渣反应,抑制CO2的吸收,烟气中的NOx会因还原性物质的存在产生高温还原作用。未来,制备CO2吸收效率高,环境适应性强的改性电石渣是主要研究方向。

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王亚丽(1978—),女,博士,教授。

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电石渣捕集水泥窑烟气中的CO2及吸收效率改性研究进展
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王亚丽 , 陈泽升 , 崔素萍 , 杨金龙 , 裴天蕊
硅酸盐学报 | 综合评述 2025,53(5): 1258-1268
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硅酸盐学报 |综合评述 2025 , 53 (5) : 1258 -1268
电石渣捕集水泥窑烟气中的CO2及吸收效率改性研究进展
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王亚丽 , 陈泽升, 崔素萍, 杨金龙, 裴天蕊
作者信息
  • 北京工业大学材料科学与工程学院,北京 100124
作者简介:

王亚丽(1978—),女,博士,教授。

Research Progress on CO2 Capture in Cement Kiln Flue Gas and Modification of Absorption Efficiency of Calcium Carbide Slag
Yali WANG , Zesheng CHEN, Suping CUI, Jinlong YANG, Tianrui PEI
Affiliations
  • School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
  • WANG Yali (1978-), female, Ph.D., Professor. E-mail:

出版时间: 2025-05-20 doi: 10.14062/j.issn.0454-5648.20240599
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目前,水泥窑烟气中CO2的捕集依旧是个难题。本文以钙基吸收法为机理,针对C-电石渣作为替代钙源多次钙循环后的易烧结、吸收效率下降等问题,综述了目前提高电石渣吸收效率和改善烧结性的不同方法,以及水泥窑烟气中其它组分对CO2捕集的影响。已有研究表明有机酸改性可以分解有机酸钙从而获得更好的表面结构,掺杂改性可以减缓颗粒的团聚,水合作用可以降低分压,减缓烧结。水泥窑烟气中的SO2会因为较强的酸性优先与电石渣反应,抑制CO2的吸收,烟气中的NOx会因还原性物质的存在产生高温还原作用。未来,制备CO2吸收效率高,环境适应性强的改性电石渣是主要研究方向。

电石渣  /  钙基吸收剂  /  二氧化碳  /  吸收效率

Carbon dioxide emissions from cement kiln flue gas constitute a significant contributor to global climate change and environmental pollution. As global emission reduction targets progress, research and application of carbon capture, utilization, and storage (CCUS) technologies have increasingly become critical strategies for mitigating CO2 emissions. Among these technologies, the calcium cycle method demonstrates substantial potential due to its low cost, high efficiency in CO2 trapping, and broad applicability, particularly in the context of cement kiln flue gas. However, traditional calcium-based materials, such as limestone, face challenges including high precalcination temperatures and resource wastage, highlighting the need for more efficient and sustainable alternatives.

Calcium carbide slag, an industrial by-product, has shown significant promise as a material for the calcium cycle method. It contains a high proportion of reactive CaO, along with inert components such as alumina and magnesium oxide. These inert components enhance resistance to sintering after preburning. However, repeated use of calcium carbide slag leads to pore structure collapse, particle agglomeration, and sintering, severely diminishing its adsorption performance and posing a significant barrier to practical application.

To address these challenges, various modification techniques have been explored to improve the absorption efficiency and sintering properties of calcium carbide slag, as well as to mitigate the impact of SO2 and NOx in flue gas on CO2 absorption.

Organic acid modification has been identified as an effective strategy to enhance the adsorption performance of calcium carbide slag. Through reactions with calcium hydroxide to form organic calcium salts, pyrolysis at high temperatures releases small molecules that disrupt the original structure of the slag. This process increases porosity, specific surface area, and CO2 adsorption capacity. Different organic acids, due to their distinct molecular structures, yield variations in the molecular weight of organic calcium salts and the types and quantities of small molecules released during pyrolysis. Consequently, modifying calcium carbide slag with specific organic acids allows tailoring of its pore structure to enhance CO2 adsorption performance.

Doping modification technology is another effective approach. By incorporating various substances into the slag, the properties of calcium carbide slag can be optimized through different chemical reaction mechanisms. Inert materials serve as structural frameworks, inhibiting CaO grain migration and growth to improve anti-sintering performance. Doping with oxygen-deficient materials facilitates CO2 diffusion and O2- migration, while potassium and sodium salts increase defect concentrations in the CaCO3 product layer, enabling more efficient Ca2+ migration and enhanced CO2 absorption.

Hydration processes also play a critical role in influencing sintering. While CaCO3 typically decomposes at high temperatures, introducing water vapor during calcination reduces the partial pressure of CO2, promoting its conversion to CaO. Water vapor also shortens decomposition residence time and slows sintering, delaying sintering deactivation and improving stability. By optimizing calcination temperatures and water vapor concentrations, the CO2 adsorption performance and stability of calcium carbide slag can be enhanced over multiple cycles.

In the context of cement kiln flue gas treatment, SO2 and NOx pose additional challenges to the CO2 trapping performance of calcium carbide slag. SO2, being strongly acidic, preferentially reacts with CaO to form dense CaSO4 layers, which accumulate over cycles, diminishing adsorbent activity. Research suggests that specific modification methods or adjustments in the absorption sequence (e.g., absorbing CO2 before SO2) can mitigate these effects. Regarding NOx, calcium carbide slag inherently lacks reductive properties and cannot remove NOx through traditional calcium cycle methods. Doping with reducing substances, such as copper, iron, and other metal oxides, can enable NOx reduction by promoting reactions that convert NOx into harmless nitrogen and oxygen.

Summary and prospects

The future of calcium carbide slag modification technology is expected to move towards systematic and refined strategies. These strategies can leverage the synergistic effects of multiple modification techniques to optimize performance across different reaction stages. As research progresses, the multifaceted applications of calcium carbide slag will gain increasing recognition. Beyond its role in CO2 capture, it holds significant potential for processes such as desulfurization and nitrogen removal.

From an environmental perspective, utilizing calcium carbide slag addresses resource wastage while aiding the cement industry in achieving a green transformation by reducing greenhouse gases and pollutants such as CO2, SO2, and NOx. Continuous innovation in modification technology will ensure that calcium carbide slag not only plays a pivotal role in CO2 capture but also in mitigating pollutants, contributing to the attainment of global emission reduction goals. The enhanced versatility and cyclic stability of modified calcium carbide slag will further support the green transition of the cement industry and other high-emission sectors, contributing to efforts toward a sustainable future.

carbide slag  /  calcium-based absorbents  /  carbon dioxide  /  absorption efficiency
王亚丽, 陈泽升, 崔素萍, 杨金龙, 裴天蕊. 电石渣捕集水泥窑烟气中的CO2及吸收效率改性研究进展. 硅酸盐学报, 2025 , 53 (5) : 1258 -1268 . DOI: 10.14062/j.issn.0454-5648.20240599
Yali WANG, Zesheng CHEN, Suping CUI, Jinlong YANG, Tianrui PEI. Research Progress on CO2 Capture in Cement Kiln Flue Gas and Modification of Absorption Efficiency of Calcium Carbide Slag[J]. Journal of the Chinese Ceramic Society, 2025 , 53 (5) : 1258 -1268 . DOI: 10.14062/j.issn.0454-5648.20240599
  • 国家自然科学基金(52072009)
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doi: 10.14062/j.issn.0454-5648.20240599
  • 接收时间:2024-09-18
  • 首发时间:2026-10-22
  • 出版时间:2025-05-20
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  • 收稿日期:2024-09-18
  • 修回日期:2024-10-28
基金
国家自然科学基金(52072009)
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    北京工业大学材料科学与工程学院,北京 100124
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2种不同金属材料的力学参数
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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