文献类型：期刊文献

英文题名：Enhancing Size-Selective Adsorption of CO2/CH4 on ETS-4 via Ion-Exchange Coupled with Thermal Treatment

作者：Peng, Qilong[1];Chen, Yu[1];Fang, Diyi[1];Liu, Chuanlei[1];Wu, Kongguo[1];Chen, Yuxiang[1];Jiang, Hao[1];Sun, Yuanyuan[1];Wu, Qiumin[1,2];Wu, Di[3,4,5];Sun, Hui[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, 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, Pullman, WA 99163 USA;[4]Washington State Univ, Gene & Linda Voiland Sch Chem Engn & Bioengn Mat S, Pullman, WA 99163 USA;[5]Washington State Univ, Dept Chem, Pullman, WA 99163 USA

年份：2023

卷号：62

期号：23

起止页码：9313

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20232614321153);WOS:【SCI-EXPANDED(收录号:WOS:001010294700001)】；

基金：This work is financially supported by the National Natural Science Foundation of China (Grants 22178109 and 21878097) and the Natural Science Foundation of Shanghai (Grant 21ZR1417700). 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：Adsorption - Carbon dioxide - Distribution functions - Heat treatment - Ions - Molecular dynamics - Pore size - Thermodynamic stability

摘要：ETS-4 shows great potential to achieve effective separationofchallenging mixtures due to its promising tunability of pores. However,the regulation of pore size is largely limited by its low thermalstability. Here, Na-ETS-4 was synthesized by the hydrothermal methodand additionally modified via ion exchange coupled with thermal treatment.Structures of all synthesized samples were examined using a varietyof characterization techniques. Both adsorption equilibrium and kineticsof CO2 and CH4 on these adsorbents were evaluatedon custom-made adsorption units. In addition, the mechanism of CO2 adsorption on different structural models of ETS-4 was revealedvia combining with the molecular dynamics (MD) simulations. Ion exchangelargely improves the thermal stability of ETS-4 and its adsorptioncapacities for CO2 and CH4. Ba-ETS-4-350 exhibitsthe largest equilibrium selectivity of 12.42 and the greatest Henry'sselectivity of 2178.51. The radial distribution function (RDF) resultsreveal the main adsorption sites of CO2 in different ETS-4structures.