文献类型：期刊文献

英文题名：In Situ Hydrothermal Conversion of Silica Gel Precursors to Binderless Zeolite X Pellets for Enhanced Olefin Adsorption

作者：Jiang, Hao[1];Wang, Dan[1];Tan, Jialun[1];Chen, Yuxiang[1];An, Yang[1];Chen, Yonghao[1];Wu, Yuan[1];Sun, Hui[1,2];Shen, Ben-xian[1,2];Wu, Di[3,4];Liu, Jichang[1,2];Ling, Hao[1,2];Zhao, Jigang[1,2];Tong, Yujun[5]

机构：[1]East China Univ Sci & Technol, Petr Proc Res Ctr, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China;[3]Washington State Univ, Alexandra Navrotsky Inst Expt Thermodynam, Gene & Linda Voiland Sch Chem Engn & Bioengn, Mat Sci & Engn, Pullman, WA 99163 USA;[4]Washington State Univ, Dept Chem, Pullman, WA 99163 USA;[5]Sinopec Dalian Res Inst Petr & Petrochem, Dalian 116100, Liaoning, Peoples R China

年份：2020

卷号：59

期号：21

起止页码：9997

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20202808928116);WOS:【SCI-EXPANDED(收录号:WOS:000537733800025)】；

基金：This work is financially supported by the National Natural Science Foundation of China (grant 21878097 and 91634112), SINOPEC (34400007-19-ZC0607-0117), and the Natural Science Foundation of Shanghai (grant 16ZR1408100). D.W. acknowledges the institutional funds from the Gene and Linda Voiland School of Chemical Engineering and Bioengineering, and the Alexandra Navrotsky Institute for Experimental Thermodynamics at Washington State University.

语种：英文

外文关键词：Intelligent systems - Pelletizing - Sodium Aluminate - Crystallization kinetics - Ion exchange - Adsorption - Zeolites - Monte Carlo methods

摘要：Binderless zeolite X pellets were "one-pot"-synthesized via in situ hydrothermal conversion of silica gel precursors in sodium aluminate solution. The conversion and crystallization kinetics were investigated as a function of synthesis time with a spectrum of techniques. It is found that four-membered rings (4R) and six-membered rings (6R) are formed by linking diffused Al species with dissolved Si species during the aging period, whereas the zeolite X frameworks are constructed via reorganization of beta cages with double six-membered rings (D6R) in a crystallization process. Furthermore, the grand canonical Monte Carlo simulation was conducted to elucidate 1-hexene adsorption on zeolite X with ion species and exchange degree variation. Specifically, the adsorption capacity and guest-host interaction energy were evaluated. Incorporation of Mg2+ and Ca2+ enables a higher adsorption capacity, whereas introduction of Co2+, Ni2+, Cu2+, and Zn2+ boosts adsorption capacity and enhances interaction energy.