Synthesis of amine-pillar[5]arene porous adsorbent for adsorption of CO_(2)and selectivity over N_(2)and CH_(4)  

作　　者：Hui Li Yanxing Qi Jia Chen Juanjuan Wang Min Yang Hongdeng Qiu 

机构地区：[1]CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China [2]National Engineering Research Center for Fine Petrochemical Intermediates,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Chemical Letters》2024年第11期226-231,共6页中国化学快报（英文版）

基　　金：financial supports from National Natural Science Foundation of China(No.22204169);Gansu Natural Science Foundation(Nos.23JRRA619,21JR7RA076);Scientific and Technological Program of Chengguan District,Lanzhou(No.2023JSCX0037)。

摘　　要：A novel amine-modified pillar[5]arene bonded porous silica adsorbent(DETA-P5S)was designed to be applied to dynamic CO_(2)adsorption and selective separation of CO_(2)over N_(2)and CH_(4)gases mixture.The results demonstrated that reasonable introduction of DETA into the BE-P5 bonded silica support has sig nificantly increased the adsorption capacity of CO_(2).The DETA-P5S has the optimal adsorption capacity of 9.1 mmol/g with 5 vol%CO_(2)at 40℃.The main reason of this increased capacity could be attributed to the enhanced CO_(2)diffusion into porous adsorbent for its better dispersion in the pores of amine pillar[5]arene cavity and active site of DETA.Furthermore,the dynamic saturation adsorption capacitie of DETA-P5S were 7.11(0.37)and 6.18(0.44)mmol/g for CO_(2)/N_(2)and CO_(2)/CH_(4),respectively,both the ga mixtures showed high separation selectivity.Simultaneously,the DETA-P5S can maintain outstanding CO_(2)adsorption capacity after fifteen regeneration cycles.Consequently,the designed DETA-P5S could serve a a promising adsorbent for CO_(2)capture and storage.

关 键 词：CO_(2)adsorption Selective separation Porous silica Solid amine adsorbents arene 

分 类 号：O647.3[理学—物理化学] X701[理学—化学]