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Thermopervaporation concept for biobutanol recovery: The effect of process parameters

机译：用于生物丁醇回收的热过汽概念：工艺参数的影响

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摘要

This work addresses the development of energy-saving (low-cost) pervaporation approach for the recovery of biobutanol from the ABE fermentation broth. To achieve this goal, thermopervaporation (TPV) separation of dilute aqueous solutions of 1-butanol through the hydrophobic poly(1-trimethylsilyl-1-propyne) (PTMSP) membranes in the plate-and-frame module with an air gap was investigated. The TPV approach allows separation at atmospheric pressure and in the presence of noncondensing gases of ABE fermentation (carbon dioxide and hydrogen). Different process parameters such as the air gap width, the temperature of the feed mixture, the permeate condensation temperature, and the membrane thickness were studied. The width of the air gap between the membrane and the condensation surface (the cooling plate) should not be lower than 2.5 mm. The TPV mode of separation of water/butanol mixture using self-supported PTMSP dense membranes makes it possible to Achieve the following process performance: the permeate flux exceeds 0.5 kg/(m(2) h) (membrane thickness is 16 gm) and the separation factor for the butanol/water mixture is about 120 (membrane thickness is 115 gm) at the atmospheric pressure and at a condensation temperature of 10 degrees C. 2015 Elsevier B.V. All rights reserved.
机译：这项工作致力于开发节能（低成本）全蒸发方法以从ABE发酵液中回收生物丁醇。为实现此目标，研究了板框组件中带有气隙的疏水性聚（1-三甲基甲硅烷基-1-丙炔）（PTMSP）膜对1-丁醇稀水溶液的热全蒸发（TPV）分离。 TPV方法允许在大气压下和存在ABE发酵的非冷凝气体（二氧化碳和氢气）的情况下进行分离。研究了不同的工艺参数，例如气隙宽度，进料混合物的温度，渗透冷凝温度和膜厚度。膜和冷凝表面（冷却板）之间的气隙宽度不应小于2.5 mm。使用自支撑PTMSP致密膜分离水/丁醇混合物的TPV模式可以实现以下工艺性能：渗透通量超过0.5 kg /（m（2）h）（膜厚度为16 gm）在大气压和10摄氏度的冷凝温度下，丁醇/水混合物的分离系数约为120（膜厚度为115克）。2015 Elsevier BV保留所有权利。

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