文献类型：期刊文献

英文题名：Semi-hollow LTA zeolite membrane for water permeation in simulated CO2 hydrogenation to methanol

作者：Song, Guoqiang Zhou, Wenjun Li, Claudia Wang, Zhigang Hu, Feiyang Wang, Tianchang Li, Ziwei Tang, Anjiang Harold, Michael P. Liu, Shaomin Kawi, Sibudjing

第一作者：宋国强;Song, Guoqiang

通信作者：Kawi, S[1];Liu, SM[2]

机构：[1]Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore;[2]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Guizhou, Peoples R China;[3]Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China;[4]Tiangong Univ, Dept Chem Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China;[5]Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Guiyang 550025, Guizhou, Peoples R China;[6]Univ Houston, Dept Chem & Biomol Engn, Houston, TX 77204 USA

第一机构：Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore

通信机构：corresponding author), Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore;corresponding author), Tiangong Univ, Dept Chem Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China.

年份：2023

卷号：678

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20231713945572);Scopus(收录号：2-s2.0-85152902717);WOS:【SCI-EXPANDED(收录号:WOS:000984247100001)】；

基金：The authors acknowledge the financial support from Green Energy Program (WBS: A-0005323-05-00) , FRC MOE T1 Project (WBS: A-0009184-00-00) and A*STAR LCER-FI Project (WBS: A-8000278-00-00) . G.S. acknowledges financial support from the National Natural Science Foundation of China (22062003) , Natural Science Foundation of Guizhou Province ([2020] 1Y037 and [2019] 2872) , Guizhou Province Energy Chemical Conversion New Material Technology Innovation Team (Qian Ke He Ping Tai Ren Cai [2019] 5609) .

语种：英文

外文关键词：LTA membrane; Molecular dynamics; Selective permeability; Steam-assisted; Water separation

摘要：Linde Type A (LTA) zeolite is an effective inorganic water permeable membrane material due to its inherent Na+-gated water-conducting mechanism. Although dense LTA membranes show excellent water selective perme-ability, the water permeability rate still needs to be improved to drive the CO2 hydrogenation reaction towards methanol production. In this work, we prepared a water-conducting LTA membrane with well-distributed non-penetrative macroholes, resulting in a cheese-like structure that combines the advantages of micro-nanochannels for high water selective permeability and macroholes for quick water diffusion. These semi-hollow (SH)-LTA membranes with different thicknesses and number of macroholes were fabricated via a steam-assisted method by adjusting the amount of water in the precursor solution. The optimized SH-LTA membranes presented an average water permeance of 8.57 x 10-7 mol m-2 s-1 Pa-1 at 200 degrees C along with CH3OH, H2, and CO2 permeances of 3.24 x 10-9, 7.92 x 10-12, and 4.32 x 10-12 mol m-2 s-1 Pa-1, respectively. The membrane stability was verified under continuous mixture gas permeation tests for 10 h between 200 and 300 degrees C. The dissolution-recrystallization route of the SH morphology was confirmed following comprehensive characterizations and complemented by molecular dynamics simulations to elucidate the superior water separation behavior in SH-LTA membrane in comparison with pristine LTA membrane.