文献类型：期刊文献

英文题名：Adsorption and Its Mechanism of CS2 on Ion-Exchanged Zeolites Y

作者：Chen, Xi[1];Shen, Ben-xian[1];Sun, Hui[1];Zhan, Guo-xiong[1];Huo, Zhen-zhen[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：56

期号：22

起止页码：6499

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20172703873107);WOS:【SCI-EXPANDED(收录号:WOS:000403136300016)】；

基金：This work is financially supported by the Training Program of the Major Research Plan of the National Natural Science Foundation of China (Grant 91634112), Natural Science Foundation of Shanghai (Grant 16ZR1408100), Fundamental Research Funds .for the Central Universities of China (Grant 22A201514010), and Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE-16C01).

语种：英文

外文关键词：Chemical analysis - Computation theory - Zeolites - Metals - Silver compounds - Metal ions - Carbon disulfide - Ion exchange - X ray photoelectron spectroscopy - Density functional theory

摘要：A series of ion-exchanged zeolites Y were prepared by postsynthesis method and characterized using multiple techniques including XRD, N-2 adsorption, XPS, FTIR, and chemical composition analysis. The adsorption of carbon disulfide (CS2) on ion-exchanged zeolites Y was investigated by dynamic adsorption tests carried out at a fixed-bed adsorption unit coupled with density functional theory (DFT) computation. The effects of metal ions, gas hourly space velocity (GHSV), and operation temperature on the adsorption capacities of CS2 on ion-exchanged samples were studied carefully. In addition, the mechanism for CS2 adsorption on zeolite Y was discussed. Among all the ion-exchanged samples, Ag-Y zeolite holds the highest CS2 breakthrough adsorption capacity up to 44.8 mg/g. The XPS analysis indicates that Ag+ was introduced into the zeolite Y structure. The DFT study indicates that the S-M (sigma) bond involving CS2 and Ag+ was formed, which strengthens the S-Ag interaction and, therefore, benefits the adsorption of CS2 on Ag-Y zeolite. The used Ag-Y zeolite can be regenerated by thermal treatment at 400 degrees C under an air atmosphere. After seven adsorption-regeneration cycles, the used Ag-Y maintains the adsorption capacity of 37.6 mg/g.