Energy saving potential of hybrid membrane and distillation process in butanol purification: Experiments, modelling and simulation
Energy saving potential of hybrid membrane and distillation process in butanol purification: Experiments, modelling and simulation
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DOI：
10.1016/j.cep.2016.03.012
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发表时间：
2016-06-01
影响因子：
4.3
通讯作者：
Friedl, Anton
中科院分区：
文献类型：
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作者：
Rom, Antonia;Miltner, Angela;Friedl, Anton
使用三个 PDMS [聚（二甲基硅氧烷）] 膜进行稀丁醇水溶液的全蒸发实验。根据最佳性能膜的实验结果，在软件 R 中进行丁醇和水渗透率的回归，并在软件 Aspen Custom Modeler 中的用户定义的渗透蒸发单元操作中实施。通过在 Aspen Plus 中实施渗透蒸发步骤，可以以一致的方式模拟混合渗透蒸发和蒸馏纯化链。使用实验研究的 PDMS 膜计算 0.5 wt% BuOH-水溶液的渗透蒸发，得到浓度为 9 wt% BuOH 的渗透流。与全蒸发相比，膜蒸馏的应用导致渗透物丁醇浓度仅为 3 wt%，并且比能量需求显着更高。对于 99 wt% BuOH 的产品纯度，与最先进的蒸馏相比，混合全蒸发和蒸馏工艺可节省约 50% 的能量需求。渗透蒸发步骤的灵敏度分析表明，与现有技术蒸馏相比，混合渗透蒸发和蒸馏工艺的能量需求减少量已超过渗透物流中 5 wt% BuOH。 (c) 2016 年由 Elsevier B.V. 出版
Pervaporation experiments of dilute aqueous butanol solutions were carried out with three PDMS [poly (dimethyl siloxane)] membranes. Based on the experimental results of the best performing membrane a regression for both butanol and water permeability was done in the software R and implemented in a user defined pervaporation unit operation in the software Aspen Custom Modeler. With the implementation of the pervaporation step in Aspen Plus the hybrid pervaporation and distillation purification chain can be simulated in consistent way.Calculation of pervaporation of a 0.5 wt% BuOH-water solution with the experimentally investigated PDMS membrane results in a permeate stream with a concentration of 9 wt% BuOH. Application of membrane distillation resulted in a permeate butanol concentration of only 3 wt% and a considerable higher specific energy demand compared to pervaporation.For product purities of 99 wt% of BuOH a hybrid pervaporation and distillation process saves around 50% of the energy demand compared to state of the art distillation. A sensitivity analysis of the pervaporation step reveals, that for the hybrid pervaporation and distillation process compared to state of the art distillation the energy demand decreases already exceeding 5 wt% BuOH in the permeate stream. (c) 2016 Published by Elsevier B.V.