Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (1): 18-30.doi: 10.1007/s40242-021-1394-x

• Reviews • Previous Articles     Next Articles

Recent Advances of Porous Solids for Ultradilute CO2 Capture

LIU Ru-Shuai, XU Shuang, HAO Guang-Ping, LU An-Hui   

  1. State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
  • Received:2021-09-28 Revised:2021-10-25 Online:2022-02-01 Published:2021-10-25
  • Contact: HAO Guang-Ping, LU An-Hui E-mail:guangpinghao@dlut.edu.cn;anhuilu@dlut.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No.21975037), the Cheung Kong Scholars Program of China(No.T2015036), the Fundamental Research Funds for the Central Universities, China[No.DUT18RC(3)075] and the Liao Ning Revitalization Talents Program, China (No.XLYC1807205).

Abstract: The urgency of dealing with global climate change caused by greenhouse gas(GHG) emissions is increasing as the carbon dioxide(CO2) concentration in the atmosphere has reached a record high value of 416 ppm(parts per million). Technologies that remove CO2 from the surrounding air(direct air capture, DAC) could result in negative carbon emissions, and thus attracts increasing attention. The steady technical progress in adsorption-based CO2 separation greatly advanced the DAC, which largely relies on advanced sorbent materials. This review focuses on the latest development of porous solids for air capture; first discussed the main types of sorbents for air capture, which include porous carbons, zeolites, silica materials, and metal-organic frameworks(MOFs), particularly their modified counterparts. Then, we evaluated their performances, including uptake and selectivity under dry and humid CO2 streams for practical DAC application. Finally, a brief outlook on remaining challenges and potential directions for future DAC development is given.

Key words: Direct air capture, Porous carbon, CO2 capture, Porous solid, Adsorption