Inorganic Chemicals Industry ›› 2023, Vol. 55 ›› Issue (8): 77-83.doi: 10.19964/j.issn.1006-4990.2022-0635

• Reviews and Special Topics • Previous Articles     Next Articles

Research progress of preparation and modification of MgO-based CO2 adsorbents

GUI Changqing1,2(), WANG Yajing1, LING Changjian2, WANG Huaiyou3, TANG Zhongfeng1,2,3()   

  1. 1.College of Science,Shenyang University of Chemical Technology,Shenyang 110020,China
    2.Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China
    3.Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China
  • Received:2022-10-30 Online:2023-08-10 Published:2023-08-25
  • Contact: TANG Zhongfeng E-mail:guichangqing@sinap.ac.cn;tangzhongfeng@sinap.ac.cn

Abstract:

The increasing concentration of CO2 will cause environmental problems such as global warming,sea level rise and glacier melting,so it is urgent to develop CO2 capture technology.As an ideal CO2 adsorbent,MgO has become a research hotspot.The preparation methods of MgO-based CO2 adsorbents were reviewed,and the changes in MgO-specific surface area,CO2 adsorption capacity and cyclic stability prepared by different methods were discussed.It was found that the MgO prepared by precipitation and sol-gel methods had larger specific surface areas and more alkaline sites,which effectively improved its ability to capture CO2.The CO2 capture ability of MgO-based adsorbents prepared by the molten salt doping modification method was significantly improved,and the CO2 adsorption capacity was still high after repeated adsorption and desorption cycles.In the future,the research on MgO-based CO2 adsorbents would mainly focus on the modification methods,process conditions optimization and capture mechanism of MgO,so as to promote the industrial application of MgO-based CO2 adsorbents.

Key words: CO2, MgO, adsorbent, molten salts

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