化工学报 ›› 2025, Vol. 76 ›› Issue (11): 6086-6099.DOI: 10.11949/0438-1157.20250285

• 材料化学工程与纳米技术 • 上一篇    下一篇

盐模板法制备多孔碳酸钙及其CO2吸附特性研究

石美玉1(), 赵波琛1, 束远1, 牛强2(), 张鹏飞1,3()   

  1. 1.宁夏大学化学化工学院省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏 银川 750021
    2.内蒙古鄂尔多斯电力 冶金集团股份有限公司国家企业技术中心,内蒙古 鄂尔多斯 016064
    3.上海交通大学化学化工学院,上海 200240
  • 收稿日期:2025-03-24 修回日期:2025-05-08 出版日期:2025-11-25 发布日期:2025-12-19
  • 通讯作者: 牛强,张鹏飞
  • 作者简介:石美玉(1996—),女,博士研究生,Smy1464632131@163.com
  • 基金资助:
    内蒙古自治区重点研发计划(2021ZD0042);内蒙古自治区重点研发计划(2021EEDSCXSFQZD006);内蒙古自治区重点研发计划(2021GG0350);鄂尔多斯市重点研发计划项目(2121HZ231-8)

Preparation of porous calcium carbonate by salt template method and its CO2 adsorption characteristics

Meiyu SHI1(), Bochen ZHAO1, Yuan SHU1, Qiang NIU2(), Pengfei ZHANG1,3()   

  1. 1.State Key Laboratory of High-efffciency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, Ningxia, China
    2.Inner Mongolia Erdos Power and Metallurgy Group Co. , Ltd. , Ordos 016064, Inner Mongolia, China
    3.School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2025-03-24 Revised:2025-05-08 Online:2025-11-25 Published:2025-12-19
  • Contact: Qiang NIU, Pengfei ZHANG

摘要:

CO2作为温室气体之一,对全球气候变化产生了显著影响。开发高效、经济的CO2捕获技术至关重要。利用CaCO3吸附CO2是一种具有潜力的方法,其原料来源广泛、成本低廉且可通过调控形貌和比表面积优化吸附性能。本研究以KCl、NaCl和LiCl为盐模板制备了CaCO3材料,并系统评估了其对CO2的吸附性能。结果表明,CaCO3-KCl的比表面积显著高于CaCO3-NaCl和CaCO3-LiCl,分别为72.6、40.2和18.9 m2/g。且CaCO3-KCl呈现多孔纳米片结构。CO2-TPD显示,CaCO3-KCl表面具有较多的吸附位点。重要的是,CaCO3-KCl、CaCO3-NaCl和CaCO3-LiCl的CO2吸附量分别为0.39、0.32和0.31 mmol/g。CaCO3-KCl在10次穿透循环实验中的CO2吸附量仅降低了7%,并对CO2/N2有着较好的分离效果。本研究揭示了盐模板剂对CaCO3形貌、比表面积及CO2吸附性能的影响,为高效CO2吸附材料的设计提供了重要参考。

关键词: 盐模板剂, 机械球磨法, 多孔结构, 碳酸钙, 吸附剂, 二氧化碳吸附

Abstract:

CO2 as one of the greenhouse gases has a significant impact on global climate change. It is crucial to develop efficient and economical CO2 capture technologies. One potential approach is the adsorption of CO2 using CaCO3 due to its wide availability, low cost and the ability to optimize the adsorption properties by modulating the morphology and specific surface area. In this study, CaCO3 materials were prepared using KCl, NaCl and LiCl as salt templates, and the CO2 adsorption properties were systematically evaluated. The results showed that the specific surface area of CaCO3-KCl was significantly higher than that of CaCO3-NaCl and CaCO3-LiCl, which were 72.6, 40.2 and 18.9 m2/g, respectively. The CaCO3-KCl showed a porous nanosheet structure. The CO2-TPD showed that the surface of CaCO3-KCl possessed more adsorption sites. Importantly, the CO2 adsorption amounts of CaCO3-KCl, CaCO3-NaCl and CaCO3-LiCl were 0.39, 0.32 and 0.31 mmol/g, respectively. The CO2 adsorption amount of CaCO3-KCl only decreased by 7% in 10 breakthrough-cycling experiments and had a better separation effect on CO2/N2. The separation effect improved from 3.4 to 44.8. This study reveals the effects of salt templating agent on the morphology, specific surface area and CO2 adsorption performance of CaCO3, which provides an important reference for the design of efficient CO2 adsorption materials.

Key words: salt templating agent, mechanical ball milling method, porous structure, CaCO3, sorbents, carbon dioxide adsorption

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