SCI和EI收录∣中国化工学会会刊

›› 2016, Vol. 24 ›› Issue (9): 1283-1289.

• Energy, Resources and Environmental Technology • 上一篇    下一篇

Improvement of CO2 capture performance of calcium-based absorbent modified with palygorskite

Liyuan Shan1, Hui Li1,2, Binglu Meng3, Youhai Yu3, Yonggang Min1,2   

  1. 1 College of Material and Mineral Resource, Xi'an University of Architecture and Technology, Xi'an 710055, China;
    2 Shaanxi Techno-Institute of Recycling Economy, Xi'an 710055, China;
    3 Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, Xi'an 710119, China
  • 收稿日期:2015-11-02 修回日期:2016-05-16 出版日期:2016-09-28 发布日期:2016-11-11
  • 通讯作者: Youhai Yu,E-mail address:youhai.yu@gmail.com;Yonggang Min,E-mail address:yong686@126.com
  • 基金资助:
    Supported by the National Natural Science Foundation of China (51274159), and Special Funds for The Major Science and Technology Innovation of Shaanxi Province (2012zkc06-2).

Improvement of CO2 capture performance of calcium-based absorbent modified with palygorskite

Liyuan Shan1, Hui Li1,2, Binglu Meng3, Youhai Yu3, Yonggang Min1,2   

  1. 1 College of Material and Mineral Resource, Xi'an University of Architecture and Technology, Xi'an 710055, China;
    2 Shaanxi Techno-Institute of Recycling Economy, Xi'an 710055, China;
    3 Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, Xi'an 710119, China
  • Received:2015-11-02 Revised:2016-05-16 Online:2016-09-28 Published:2016-11-11
  • Supported by:
    Supported by the National Natural Science Foundation of China (51274159), and Special Funds for The Major Science and Technology Innovation of Shaanxi Province (2012zkc06-2).

摘要: Limestone can be used for CO2 capture and sequestration (CCS) in flue gas effectively. However, its CCS capability will dramatically decline after several cycles due to the surface "sintering". In this work, the limestone was modified with palygorskite to reduce sintering phenomenon between the absorbent particles during the CCS process and the carbonation rate of the limestone can be enhanced effectively. Palygorskite is a natural mineral with nano-fibrous structure which can reduce the mutual contact of limestone particles during the CCS process. The results were detected by TGA, SEM,MIP, FTIR and particle size analyzer respectively. The best CO2 capture performance of modified absorbent was 13.11% improvement with only 5 wt% palygorskite added during the CCS process after 15 cycles compared with natural absorbent. It was found that excellent microscopic structures of absorbent modified with palygorskite was created, and the surface sintering was postponed leading to CO2 capture performance enhanced under the same conditions.

关键词: CO2 capture, Palygorskite modification, Limestone, Carbonation rate, Anti-sintering

Abstract: Limestone can be used for CO2 capture and sequestration (CCS) in flue gas effectively. However, its CCS capability will dramatically decline after several cycles due to the surface "sintering". In this work, the limestone was modified with palygorskite to reduce sintering phenomenon between the absorbent particles during the CCS process and the carbonation rate of the limestone can be enhanced effectively. Palygorskite is a natural mineral with nano-fibrous structure which can reduce the mutual contact of limestone particles during the CCS process. The results were detected by TGA, SEM,MIP, FTIR and particle size analyzer respectively. The best CO2 capture performance of modified absorbent was 13.11% improvement with only 5 wt% palygorskite added during the CCS process after 15 cycles compared with natural absorbent. It was found that excellent microscopic structures of absorbent modified with palygorskite was created, and the surface sintering was postponed leading to CO2 capture performance enhanced under the same conditions.

Key words: CO2 capture, Palygorskite modification, Limestone, Carbonation rate, Anti-sintering

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