SCI和EI收录∣中国化工学会会刊

›› 2015, Vol. 23 ›› Issue (2): 366-371.DOI: 10.1016/j.cjche.2014.11.021

• SEPARATION SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Development of a pentaethylenehexamine-modified solid support adsorbent for CO2 capture from model flue gas

Li Wei1,2, Yu Jing2, Zhengming Gao1, Yundong Wang2   

  1. 1 School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
    2 The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2013-06-03 Revised:2013-10-24 Online:2015-03-01 Published:2015-02-28
  • Supported by:
    Supported by the National Natural Science Foundation of China (20836008, 21176132), and the Special Research Fund for the Doctoral Program of the Ministry of Education of China (20101012174).

Development of a pentaethylenehexamine-modified solid support adsorbent for CO2 capture from model flue gas

Li Wei1,2, Yu Jing2, Zhengming Gao1, Yundong Wang2   

  1. 1 School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
    2 The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • 通讯作者: Zhengming Gao, Yundong Wang
  • 基金资助:
    Supported by the National Natural Science Foundation of China (20836008, 21176132), and the Special Research Fund for the Doctoral Program of the Ministry of Education of China (20101012174).

Abstract: A novel solid support adsorbent for CO2 capture was developed by loading pentaethylenehexamine (PEHA) on commercially available mesoporous molecular sieve MCM-41 using wet impregnation method. MCM-41 samples before and after PEHA loading were characterized by X-ray powder diffraction, N2 adsorption/desorption, thermal gravimetric analysis and scanning electron microscope to investigate the textural and thermo-physical properties. CO2 adsorption performance was evaluated in a fixed bed adsorption system. Results indicated that the structure of MCM-41 was preserved after loading PEHA. Surface area and total pore volume of PEHA loaded MCM-41 decreased with the increase of loading. The working adsorption capacity of CO2 could be significantly improved at 60% of PEHA loading and 75℃. The effect of the height of adsorbent bed was investigated and the best working adsorption capacity for MCM-41-PEHA-60 reached 165 mg·(g adsorbent)-1 at 75℃. Adsorption/desorption circle showed that the CO2 working adsorption capacity of MCM-41-PEHA kept stable.

Key words: CO2 adsorption, Pentaethylenehexamine, MCM-41 molecular sieve, CO2 adsorbent

摘要: A novel solid support adsorbent for CO2 capture was developed by loading pentaethylenehexamine (PEHA) on commercially available mesoporous molecular sieve MCM-41 using wet impregnation method. MCM-41 samples before and after PEHA loading were characterized by X-ray powder diffraction, N2 adsorption/desorption, thermal gravimetric analysis and scanning electron microscope to investigate the textural and thermo-physical properties. CO2 adsorption performance was evaluated in a fixed bed adsorption system. Results indicated that the structure of MCM-41 was preserved after loading PEHA. Surface area and total pore volume of PEHA loaded MCM-41 decreased with the increase of loading. The working adsorption capacity of CO2 could be significantly improved at 60% of PEHA loading and 75℃. The effect of the height of adsorbent bed was investigated and the best working adsorption capacity for MCM-41-PEHA-60 reached 165 mg·(g adsorbent)-1 at 75℃. Adsorption/desorption circle showed that the CO2 working adsorption capacity of MCM-41-PEHA kept stable.

关键词: CO2 adsorption, Pentaethylenehexamine, MCM-41 molecular sieve, CO2 adsorbent