Separation Engineering
Synthesis of SAPO-34 Membrane and Its Application to the Separation of Water/Acetic Acid Mixtures by Vapor Permeation
2022 年 55 巻 2 号 p. 97-104
詳細
2022 年 55 巻 2 号 p. 97-104
CHA-type zeolite SAPO-34 membranes were synthesized on a tubular porous α-alumina support using a secondary growth method and tested for the separation of water/acetic acid mixtures by vapor permeation. The effects of SiO2 molar fraction in the preparation gel on the membrane formation process and the separation properties of SAPO-34 membranes were studied. The SiO2 molar fraction in the synthesis gel substantially affected the separation properties of prepared membranes. The membrane synthesized using a gel with a composition of 1.0 Al2O3 : 0.9 H3PO4 : 0.6 SiO2 : 0.8 TEAOH : 100 H2O exhibited a high separation factor of 140 with the water permeance of 2.2×10−7 mol m−2 s−1 Pa−1. SAPO-34 membranes prepared in this study also showed resistance against acetic acid.
