Tanizume Shusei, Yoshimura Toshihiro, Ishii Katsunori, Nomura Mikihiro
Department of Applied Chemistry, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan.
Membranes (Basel). 2020 Feb 7;10(2):26. doi: 10.3390/membranes10020026.
A membrane for controlling methanol-to-olefin (MTO) reactions was developed, which featured an MFI-type zeolite membrane (Si/Al = 25) that was synthesized on a porous α-alumina substrate using a secondary growth method. Here, the H/SF permeance ratios were between 150 and 450. The methanol conversion rate was 70% with 38% ethylene selectivity and 28% propylene selectivity as determined using a cross-flow membrane contactor. In order to improve the olefin selectivity of the membrane, the MFI zeolite layer (Si/Al = ∞) was coated on an MFI-type zeolite membrane (Si/Al = 25). Using this two-layered membrane system, the olefin selectivity value increased to 85%; this was 19% higher than the value obtained during the single-layer membrane system.
开发了一种用于控制甲醇制烯烃（MTO）反应的膜，其特征在于使用二次生长法在多孔α-氧化铝载体上合成的MFI型沸石膜（硅铝比 = 25）。在此，氢/短链脂肪酸渗透比在150至450之间。使用错流膜接触器测定，甲醇转化率为70%，乙烯选择性为38%，丙烯选择性为28%。为了提高膜的烯烃选择性，在MFI型沸石膜（硅铝比 = 25）上涂覆了MFI沸石层（硅铝比 = ∞）。使用这种双层膜系统，烯烃选择性值提高到了85%；这比单层膜系统获得的值高19%。
