Recovery of butanol from model solutions and fermentation broth using a silicalite/silicone membrane

摘要

A silcone-silicalite-1 composite membrane was synthesized to recover acetone, butanol, and ethanol (ABE) from model solutions and the Clostridium acetobutylicum (ABE) fermentation broth. The adsorption capacity of the silicalite-1 in the presnece of a mixture of acetone, butanol and ethanol were 8-12, 85-90 and <5 mg/g, respectively. There was no apparent difference of absorption rate of butanol at 36 deg C and 79 deg C and desorption of butanol occurred efficiently at 78 deg C and 1-3 Torr. The silicalite-1 was characterized by chemical analysis, NMR, eelctron micrographs, surface area and pore size determination and found to have identical properties to other silicalite-1 reported in the literature.