High-temperature pervaporation performance of ceramic-supported polyimide membranes in the dehydration of alcohols

✍ Scribed by Robert Kreiter; Damian P. Wolfs; Charles W.R. Engelen; Henk M. van Veen; Jaap F. Vente

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 1011 KB
• Volume: 319
• Category: Article
• ISSN: 0376-7388
• DOI: 10.1016/j.memsci.2008.03.026

✦ Synopsis

Ceramic-supported polymer (CSP) membranes were prepared based on Torlon, P84, and Matrimid. The dehydration performance of these membranes was determined by pervaporation of n-butanol/water mixtures (95/5 wt%) at 95 • C. Based on their performance P84 was selected for further testing. P84 membranes showed excellent separation performance in dehydration of n-butanol for at least 300 days. Different curing temperatures in the range of 70-300 • C were used. The most significant flux difference was seen for a P84 membrane cured at 300 • C, compared to the lower temperatures. The separation performance of a P84 CSP membrane at 150 • C showed water fluxes in the range of 1-6 kg/m 2 h and separation factors of at least 360. The membrane life-time in n-butanol/water mixtures ranges from 80 to 140 days at 150 • C. No clear relation between curing temperature and membrane stability could be derived. Reasonable separation performance of a P84 CSP membrane in an ethanol/water mixture was demonstrated. Stable performance at 150 • C was observed for the dehydration of t-butanol up to at least 250 days.