Simultaneous Reaction and High Separation Processes by Use of Catalytic Zeolite Membrane

点击翻译按钮获取中文摘要

Zeolites are crystalline alumino-silicate, and widely used as catalysts and adsorbents. MFI-type zeolite has fine pores within its crystals, the diameter of which is almost the same as the molecular size of benzene. Hence, the zeolite shows high molecular-sieving effect. When the zeolite is succeeded to be prepare in the shape of membrane, the membrane can enable to realize new separation and simultaneous reaction and separation with high performance. The main objective of this project is to development of MFI-type zeolite catalytic membrane, and to apply it to high separation and simultaneous reaction and separation processes. We obtained the following results through this research work :In fiscal year of 1999 :(1) MFI-type catalytic membrane was succeeded to prepared without any pin-holes by a new method, wellmixed hydrothermal synthesis.(2) When this membrane was applied to the pervaporation of concentrated acetic acid solutions, this membrane allowed only water to permeate in the r … More ange of the concentration of acetic acid from 30 to 98wt%.(3) We developed a new method, called "Catalytic Cracking of Silane (CCS) method", for decreasing the pore diameter of zeolite. The zeolite membrane treated by this method showed high separation factor of H_2 from mixture gases of H_2 and N_2 or O_2, about 100, as compared with 1.4 to 3 for a fresh zeolite membrane.In fiscal year of 2000 :Zeolites are crystalline alumino-silicate, and widely used as catalysts and adsorbents. MFI-type zeolite has fine pores within its crystals, the diameter of which is almost the same as the molecular size of benzene. Hence, the zeolite shows high molecular-sieving effect. When the zeolite is succeeded to be prepare in the shape of membrane, the membrane can enable to realize new separation and simultaneous reaction and separation with high performance. The main objective of this project is to development of MFI-type zeolite catalytic membrane, and to apply it to high separation and simultaneous reaction and separation processes. We obtained the following results through this research work : Less