SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 50 ›› Issue (10): 177-184.DOI: 10.1016/j.cjche.2022.09.005

• Separation Science and Engineering • Previous Articles     Next Articles

High-temperature CO2 sorbents with citrate and stearate intercalated Ca—Al hydrotalcite-like as precursor

Tao Jiang, Fei Xiao, Yujun Zhao, Shengping Wang, Xinbin Ma   

  1. Key Laboratory for Green Chemical Technology, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
  • Received:2022-03-31 Revised:2022-09-23 Online:2023-01-04 Published:2022-10-28
  • Contact: Shengping Wang,E-mail:spwang@tju.edu.cn
  • Supported by:
    Financial support by National Key Research and Development Program of China (2017YFB0603300), the Program for New Century Excellent Talents in University (NCET-13-0411) and the Program of Introducing Talents of Discipline to Universities (B06006) is gratefully acknowledged.

High-temperature CO2 sorbents with citrate and stearate intercalated Ca—Al hydrotalcite-like as precursor

Tao Jiang, Fei Xiao, Yujun Zhao, Shengping Wang, Xinbin Ma   

  1. Key Laboratory for Green Chemical Technology, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
  • 通讯作者: Shengping Wang,E-mail:spwang@tju.edu.cn
  • 基金资助:
    Financial support by National Key Research and Development Program of China (2017YFB0603300), the Program for New Century Excellent Talents in University (NCET-13-0411) and the Program of Introducing Talents of Discipline to Universities (B06006) is gratefully acknowledged.

Abstract: CO2, one of the main components of greenhouse gases, increased rapidly because of the growing use of fossil fuels. And CaO sorbents possess the capability to be used in capture of CO2 at high temperature. In the work, Ca—Al complex oxides derived from citrate and stearate intercalated layered double hydroxides were fabricated and their CO2 adsorption capacity was compared with that from CO32- intercalated layered double hydroxides. The results presented that the sorbents (Ca/Al = 5) with Ca—Al—citrate layered double hydroxides as precursors performed best and displayed remarkable CO2 capture capacity of 52.0% (mass) at the carbonization temperature of 600 ℃ without distinct recession during cycling adsorption/desorption tests. The excellent CO2 adsorption capacity of the sorbent was ascribed to its smaller crystallite size of calcinated particles, optimized pore size distribution as well as homogeneous distributed Ca and Al in the sorbent.

Key words: Layered double hydroxides, CO2 capture, CaO-based, Organic ions

摘要: CO2, one of the main components of greenhouse gases, increased rapidly because of the growing use of fossil fuels. And CaO sorbents possess the capability to be used in capture of CO2 at high temperature. In the work, Ca—Al complex oxides derived from citrate and stearate intercalated layered double hydroxides were fabricated and their CO2 adsorption capacity was compared with that from CO32- intercalated layered double hydroxides. The results presented that the sorbents (Ca/Al = 5) with Ca—Al—citrate layered double hydroxides as precursors performed best and displayed remarkable CO2 capture capacity of 52.0% (mass) at the carbonization temperature of 600 ℃ without distinct recession during cycling adsorption/desorption tests. The excellent CO2 adsorption capacity of the sorbent was ascribed to its smaller crystallite size of calcinated particles, optimized pore size distribution as well as homogeneous distributed Ca and Al in the sorbent.

关键词: Layered double hydroxides, CO2 capture, CaO-based, Organic ions