Please use this identifier to cite or link to this item:
Title: PBI Hollow fibers for pervaporation dehydration of acetone
Authors: Shi, G.M. 
Wang, Y. 
Chung, T.-S. 
Issue Date: 2011
Citation: Shi, G.M.,Wang, Y.,Chung, T.-S. (2011). PBI Hollow fibers for pervaporation dehydration of acetone. 11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings : -. ScholarBank@NUS Repository.
Abstract: Acetone dehydration via pervaporation is challenging because acetone and water have close molecular sizes and acetone has a much higher vapor pressure than water. Acetone is also a powerful solvent which dissolves or swells most polymers. We have developed novel polybenzimidazole/BTDA-TDI/MDI (PBI/P84) dual-layer hollow fibers for pervaporation dehydration of acetone for industrial and biofuel separations. Both thermal and chemical cross-linking modifications were applied to the membranes in order to investigate their effectiveness to overcome acetone-induced swelling. Thermal treatment can effectively enhance separation performance, but performance stability can only be achieved through the cross-linking modification of PBI. Cross-linking by p-xylene dichloride followed by a thermal treatment above 250 °C show significant effectiveness to improve and stabilize pervaporation performance. The fractional free volume of the PBI selective layer reduces from 3.27% to 1.98% and 1.33%, respectively, after thermal treatment and a combination of chemical/thermal cross-linking modifications characterized by positron annihilation spectroscopy.
Source Title: 11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings
ISBN: 9780816910700
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

checked on Feb 17, 2020

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.