High Efficiency Mixed Amine Adsorbents for Directly Capturing Carbon Dioxide from Air  

作　　者：WU Yilu ZHENG Haolong XIA Zihan FU Chengmin XU Feng YAN Jian 

机构地区：[1]School of Environment and Chemical Engineering,Foshan University,Foshan,528000,P.R.China [2]Guangzhou Zhixin High School,Guangzhou,510080,P.R.China

出　　处：《Chemical Research in Chinese Universities》2025年第1期138-145,共8页高等学校化学研究(英文版)

基　　金：supported by the Guangdong Basic and Applied Basic Research Foundation of Guangdong Province,China(No.2023A1515140085);the National Natural Science Foundation of China(No.22208050);the Scientific Research Project of Guangdong Provincial Department of Education,China(No.2022KTSCX122).

摘　　要：The development of effective adsorbents with high amine efficiency and CO_(2)adsorption almost unaffected by humidity is extremely challenging.In this study,we introduce an innovative solid amine adsorbent,TETA/DEA@FS,composed of triethylenetetramine(TETA)and diethanolamine(DEA)functionalized fumed silica(FS),which exhibits exceptional capability in selectively capturing trace CO_(2)from N_(2).TETA/DEA@FS shows an exceptionally high capacity of CO_(2)adsorption of 1.13 mmol/g at the temperature of 298 K and the pressure of 0.0004 bar(1 bar=100 kPa),and achieves an unprecedented CO_(2)/N_(2)IAST selectivity of 1.70×10^(12).TETA/DEA@FS exhibits high amine efficiency,with breakthrough experiments demonstrating that CO_(2)adsorption remains nearly unaffected by humidity.Meanwhile,TETA/DEA@FS demonstrates rapid CO_(2)adsorption kinetics and outstanding cyclic stability.

关 键 词：Direct air capture(DAC) CO_(2) N_(2) TRIETHYLENETETRAMINE DIETHANOLAMINE 

分 类 号：O64[理学—物理化学]