Novel distillation process for effective and stable separation of high-concentration acetone-butanol-ethanol mixture from fermentation-pervaporation integration process.
Novel distillation process for effective and stable separation of high-concentration acetone-butanol-ethanol mixture from fermentation-pervaporation integration process.
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发酵-渗透蒸发一体化工艺中高浓度丙酮-丁醇-乙醇混合物有效稳定分离的精馏新工艺
DOI：
10.1186/s13068-018-1284-8
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发表时间：
2018
影响因子：
6.3
通讯作者：
Tan T
中科院分区：
文献类型：
--
作者：
Chen H;Cai D;Chen C;Wang J;Qin P;Tan T
利用可再生生物质资源进行丙酮-丁醇-乙醇（ABE）发酵的主要障碍之一是能量密集型分离过程。为降低ABE下游分离过程的能耗，将常规精馏与原位分离相结合是一种有效的方法。然而，在蒸馏过程中，乙醇塔的高回流比和乙醇在水和丁醇塔顶部的积聚导致蒸馏的可控性差和操作成本高。本研究开发了一种基于滗析器辅助的乙醇-丁醇-水循环回路的减压蒸馏过程，称为E-TCD序列，以改进ABE分离的常规分离序列。以原位渗透蒸发系统的渗透液为原料。采用迭代策略对精馏过程进行了模拟和优化。将发酵-渗透汽化集成工艺获得的丙酮、丁醇和乙醇浓度分别为115.8 g/L、191.4 g/L和17.8 g/L（另一组分为水）的ABE混合物用作进料。进行规模为1025 kg/h的ABE混合物的装置，并且产物纯度分别为100重量%的丁醇、99.7重量%的丙酮和95重量%的乙醇。结果表明，ABE分离所需能量仅为5.3MJ/kg（丁醇），仅为常规精馏过程能量消耗的37.54%。与传统精馏过程中乙醇回收率极高和丁醇-水循环回路中乙醇积累的缺点相比，新的E-TCD序列避免了乙醇积累。本文的在线版本（10.1186/s13068-018-1284-8）包含补充材料，可供授权用户使用。
One of the major obstacles of acetone–butanol–ethanol (ABE) fermentation from renewable biomass resources is the energy-intensive separation process. To decrease the energy demand of the ABE downstream separation processes, hybrid in situ separation system with conventional distillation is recognized as an effective method. However, in the distillation processes, the high reflux ratio of the ethanol column and the accumulation of ethanol on top of the water and butanol columns led to poor controllability and high operation cost of the distillations. In this study, vacuum distillation process which is based on a decanter-assisted ethanol–butanol–water recycle loop named E-TCD sequence was developed to improve the conventional separation sequence for ABE separation. The permeate of in situ pervaporation system was used as the feed. The distillation processes were simulated and optimized by iterative strategies. ABE mixture with acetone, butanol and ethanol concentrations of 115.8 g/L, 191.4 g/L and 17.8 g/L (the other composition was water) that obtained from fermentation–pervaporation integration process was used as the feed. A plant scaled to 1025 kg/h of ABE mixture was performed, and the product purities were 100 wt% of butanol, 99.7 wt% of acetone and 95 wt% of ethanol, respectively. Results showed that only 5.3 MJ/kg (of butanol) was required for ABE separation, which was only 37.54% of the energy cost in conventional distillation processes. Compared with the drawbacks of ethanol accumulation in butanol–water recycle loop and the extremely high recovery rate of ethanol in conventional distillation processes, simulation results obtained in the current work avoided the accumulation of ethanol based on the novel E-TCD sequence. The online version of this article (10.1186/s13068-018-1284-8) contains supplementary material, which is available to authorized users.
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影响因子：
9.8
作者：
DiCai;Dong, Zhongshi;Tan, Tianwei
通讯作者：
Tan, Tianwei
DOI：
10.1016/j.cep.2016.03.012
发表时间：
2016-06-01
影响因子：
4.3
作者：
Rom, Antonia;Miltner, Angela;Friedl, Anton
通讯作者：
Friedl, Anton
影响因子：
11.4
作者：
Van Hecke, Wouter;Hofmann, Tim;De Weyer, Heleen
通讯作者：
De Weyer, Heleen
影响因子：
3.9
作者：
Belletante, Segolene;Montastruc, Ludovic;Domenech, Serge
通讯作者：
Domenech, Serge
通过生物进化的人工模拟重复驯化以增强丙酮丁醇梭菌的丁醇耐受性和产量
影响因子：
11.4
作者：
Liu, Xiao-Bo;Gu, Qiu-Ya;Yu, Xiao-Bin
通讯作者：
Yu, Xiao-Bin