Enhancing hydrophobicity via core-shell metal organic frameworks for high-humidity flue gas CO_(2) capture  

作　　者：Yinji Wan Dekai Kong Feng Xiong Tianjie Qiu Song Gao Qiuning Zhang Yefan Miao Mulin Qin Shengqiang Wu Yonggang Wang Ruiqin Zhong Ruqiang Zou 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum(Beijing),Beijing 102249,China [2]Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials,School of Materials Science and Engineering,Peking University,Beijing 100871,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第9期82-89,共8页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51772329,51972340,and 51825201)。

摘　　要：Developing metal-organic framework(MOF)materials with the moisture-resistant feature is highly desirable for CO_(2)capture from highly humid flue gas.In this work,a new core-shell MOF@MOF composite using Mg-MOF-74 with high CO_(2)capture capacity as a functional core and hydrophobic zeolitic imidazolate framework-8(ZIF-8)as a protective shell is fabricated by the epitaxial growth method.Experimental results show that the CO_(2)adsorption performance of the core-shell structured Mg-MOF-74@ZIF-8 composites from water-containing flue gas is enhanced along with their improved hydrophobicity.The dynamic breakthrough results show that the Mg-MOF-74@ZIF-8 with three assembled layers(Mg-MOF-74@ZIF-8-3)can capture 3.56 mmol-g^(-1)CO_(2)from wet CO_(2)/N_(2)(VCO_(2):V_(N_(2))=15:85)mixtures,which outperforms Mg-MOF-74(0.37 mmol·g^(-1))and most of the reported physisorbents.

关 键 词：CORE-SHELL Mg-MOF-74@ZIF-8 CO_(2)capture Hydrophobic effect 

分 类 号：TB3[一般工业技术—材料科学与工程]