Energy-efficient recovery of butanol from model solutions and fermentation broth by adsorption |
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Authors: | N Qureshi S Hughes I S Maddox M A Cotta |
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Institution: | (1) United States Department of Agriculture, National Center for Agricultural Utilization Research (USDA, NCAUR), Fermentation Biotechnology, 1815 N University Street, Peoria, IL 61604, USA;(2) USDA, NCAUR, Bioproducts and Biocatalysis, 1815 N University Street, Peoria, IL 61604, USA;(3) Institute of Engineering and Technology, Massey University, Palmerston North, New Zealand |
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Abstract: | This article discusses the separation of butanol from aqueous solutions and/or fermentation broth by adsorption. Butanol fermentation
is also known as acetone butanol ethanol (ABE) or solvent fermentation. Adsorbents such as silicalite, resins (XAD-2, XAD-4,
XAD-7, XAD-8, XAD-16), bone charcoal, activated charcoal, bonopore, and polyvinylpyridine have been studied. Use of silicalite
appears to be the more attractive as it can be used to concentrate butanol from dilute solutions (5 to 790–810 g L−1) and results in complete desorption of butanol (or ABE). In addition, silicalite can be regenerated by heat treatment. The
energy requirement for butanol recovery by adsorption–desorption processes has been calculated to be 1,948 kcal kg−1 butanol as compared to 5,789 kcal kg−1 butanol by steam stripping distillation. Other techniques such as gas stripping and pervaporation require 5,220 and 3,295 kcal kg−1 butanol, respectively.
Mention of trade names of commercial products in this article/publication is solely for the purpose of providing scientific
information and does not imply recommendation or endorsement by the United States Department of Agriculture. |
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Keywords: | Butanol Adsorption Silicalite ABE Recovery Polyvinylpyridine |
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