Qureshi N, Hughes S, Maddox I S, Cotta M A
United States Department of Agriculture, National Center for Agricultural Utilization Research (USDA, NCAUR), Fermentation Biotechnology, 1815 N University Street, Peoria, IL 61604, USA.
Bioprocess Biosyst Eng. 2005 Jul;27(4):215-22. doi: 10.1007/s00449-005-0402-8. Epub 2005 Mar 3.
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.
本文讨论了通过吸附从水溶液和/或发酵液中分离丁醇的方法。丁醇发酵也被称为丙酮丁醇乙醇（ABE）发酵或溶剂发酵。人们已经研究了诸如硅沸石、树脂（XAD - 2、XAD - 4、XAD - 7、XAD - 8、XAD - 16）、骨炭、活性炭、邦诺孔和聚乙烯吡啶等吸附剂。使用硅沸石似乎更具吸引力，因为它可用于从稀溶液（5至790 - 810克/升）中浓缩丁醇，并能使丁醇（或ABE）完全解吸。此外，硅沸石可通过热处理进行再生。据计算，通过吸附 - 解吸过程回收丁醇的能量需求为每千克丁醇1948千卡，而通过汽提蒸馏回收丁醇的能量需求为每千克丁醇5789千卡。其他技术如气提和渗透蒸发分别需要每千克丁醇5220千卡和3295千卡。
