Hasegawa Yasuhisa, Abe Chie, Natsui Mayumi, Ikeda Ayumi
Research Institute of Chemical Process Technology, National Institute of Advanced Industrial Science and Technology, 4-2-1 Nigatake, Sendai 983-8551, Japan.
Membranes (Basel). 2021 Mar 30;11(4):249. doi: 10.3390/membranes11040249.
The polycrystalline CHA-type zeolite layer with Si/Al = 18 was formed on the porous α-AlO tube in this study, and the gas permeation properties were determined using single-component H, CO, N, CH, -CH, and SF at 303-473 K. The membrane showed permeation behavior, wherein the permeance reduced with the molecular size, attributed to the effect of molecular sieving. The separation performances were also determined using the equimolar mixtures of N-SF, CO-N, and CO-CH. As a result, the N/SF and CO/CH selectivities were as high as 710 and 240, respectively. However, the CO/N selectivity was only 25. These results propose that the high-silica CHA-type zeolite membrane is suitable for the separation of CO from CH by the effect of molecular sieving.
本研究在多孔α - AlO管上形成了Si/Al = 18的多晶CHA型沸石层，并在303 - 473 K下使用单组分H、CO、N、CH、-CH和SF测定了气体渗透性能。该膜表现出渗透行为，其中渗透通量随分子尺寸减小，这归因于分子筛效应。还使用N - SF、CO - N和CO - CH的等摩尔混合物测定了分离性能。结果，N/SF和CO/CH选择性分别高达710和240。然而，CO/N选择性仅为25。这些结果表明，高硅CHA型沸石膜通过分子筛效应适用于从CH中分离CO。
