Preparation of high selectivity silicalite-1 membranes by two-step in situ hydrothermal synthesis

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 年，卷（期）: 2011,（33）
• 页码范围: 3578-3582
• 页数: 5页
• 分类号: TB43
• 语种: 中文

摘要

High selectivity silicalite-1 membranes were synthesized on silica tubes by in situ hydrothermal synthesis. Using a two-step synthesis, a membrane with a separation factor of 99 was prepared for separating an ethanol/water mixture at 60°C. The average (n = 4) flux and separation factor of the membranes were 0.47 kg m-2 h-1 and 89, respectively. The membranes exhibited high reproducibility, and the relative standard deviation of the average (n = 4) flux and separation factor were only 5.3% and 9.2%, respectively. These results suggest that silica is a suitable support for synthesis of high-performance silicalite-1 membranes.