Synthesis of mesoporous SiO 2 xerogel/chitosan mixed-matrix membranes for butanol dehydration
Journal
Journal of Industrial and Engineering Chemistry
Journal Volume
57
Pages
297-303
Date Issued
2018
Author(s)
Abstract
Novel mesoporous SiO 2 xerogel/chitosan (CS) mixed-matrix membranes (MMMs) were successfully prepared by incorporating sol¡Vgel synthesized SiO 2 xerogels into glutaraldehyde (GA) cross-linked CS membranes. The effects of the SiO 2 doping amount and the feed temperature on the performance of the separation of butanol and water was also investigated in this study. The 0.25 wt% SiO 2 xerogel/CS MMMs possessed the best pervaporation performance and the largest PSI value of 1102 kg/m 2 h with a permeate flux of 736 g/m 2 h (Permeability of 3.25 ¡Ñ 10 ?5 g m m ?2 h ?1 Pa ?1 ) and a separation factor of 1498 at a feed temperature of 50 ¢XC. This PSI value is not only comparable but also exceeds that of other membranes reported in the literature. The separation factor and the flux of the SiO 2 xerogel/CS MMMs in this study clearly exceed the upper limit of the previously reported MMMs. As a result, the as-prepared novel SiO 2 xerogel/CS MMMs showed an improved performance during the butanol and water separation process, which raises the possibility of future pervaporation applications using this novel SiO 2 xerogel/CS MMMs. ? 2017 The Korean Society of Industrial and Engineering Chemistry
Subjects
Butanol/water separation
Mixed-matrix membranes
Pervaporation
SiO 2 xerogel
Type
journal article