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A Coupling Process of Distillation with Vapor Permeation and Adsorption for Production of Fuel Ethanol: A Comparative Analysis on Energy Consumption
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-01-06 , DOI: 10.1021/acs.iecr.1c01978 Jiacheng Wang 1 , Jiaqi Zhang 1 , Zhou Hong 2 , Xuechao Gao 1 , Xuehong Gu 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-01-06 , DOI: 10.1021/acs.iecr.1c01978 Jiacheng Wang 1 , Jiaqi Zhang 1 , Zhou Hong 2 , Xuechao Gao 1 , Xuehong Gu 1
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To efficiently produce fuel ethanol from fermentation broth, the distillation column was coupled with vapor permeation (VP) of a NaA zeolite membrane instead of using the adsorption technique to remove solvent water. The comparative analysis indicated that the energy efficiency was consistently higher for distillation-VP coupling, using a single-column distillation and three-column distillation, respectively. The best performance was obtained for the VP membrane coupling with a three-column distillation technique, where only 2.7 tons of steam per ton of fuel ethanol were consumed to produce fuel ethanol using a 3.0 wt % ethanol broth. This saved 0.25 tons of steam per ton of fuel ethanol in comparison with the results for the coupling with adsorption technique. The effect of ethanol content in broth on the energy efficiency was also investigated, which indicated that the ethanol content was a decisive factor to determine the energy consumption in the coupling techniques. The operation pressures were crucial to balance the energy consumption between columns coupled with the VP membrane. It was found that the operation pressure of the low-pressure column was the decisive factor to the whole energy efficiency, while the pressure of the high-pressure column was preferably adjusted according to practical production due to fewer disturbances in the system. This work benefits the process design for production of fuel ethanol from fermentation broth.
中文翻译：
蒸馏与蒸汽渗透吸附耦合生产燃料乙醇：能耗比较分析
为了从发酵液中高效生产燃料乙醇，蒸馏塔与 NaA 沸石膜的蒸汽渗透 (VP) 相结合，而不是使用吸附技术去除溶剂水。比较分析表明，分别使用单柱蒸馏和三柱蒸馏，蒸馏-VP 耦合的能量效率始终较高。VP 膜耦合与三柱蒸馏技术获得了最佳性能，其中每吨燃料乙醇仅消耗 2.7 吨蒸汽来生产使用 3.0 wt% 乙醇肉汤的燃料乙醇。与吸附技术耦合的结果相比，每吨燃料乙醇节省了 0.25 吨蒸汽。还研究了肉汤中乙醇含量对能量效率的影响，这表明乙醇含量是决定耦合技术能耗的决定性因素。操作压力对于平衡与 VP 膜耦合的色谱柱之间的能耗至关重要。研究发现，低压塔的运行压力是整个能效的决定性因素，而高压塔的压力因系统扰动较少，优选根据实际生产情况进行调整。这项工作有利于发酵液生产燃料乙醇的工艺设计。研究发现，低压塔的运行压力是整个能效的决定性因素，而高压塔的压力因系统扰动较少，优选根据实际生产情况进行调整。这项工作有利于发酵液生产燃料乙醇的工艺设计。研究发现，低压塔的运行压力是整个能效的决定性因素，而高压塔的压力因系统扰动较少，优选根据实际生产情况进行调整。这项工作有利于发酵液生产燃料乙醇的工艺设计。
更新日期：2022-01-19
中文翻译：
蒸馏与蒸汽渗透吸附耦合生产燃料乙醇：能耗比较分析
为了从发酵液中高效生产燃料乙醇，蒸馏塔与 NaA 沸石膜的蒸汽渗透 (VP) 相结合，而不是使用吸附技术去除溶剂水。比较分析表明，分别使用单柱蒸馏和三柱蒸馏，蒸馏-VP 耦合的能量效率始终较高。VP 膜耦合与三柱蒸馏技术获得了最佳性能，其中每吨燃料乙醇仅消耗 2.7 吨蒸汽来生产使用 3.0 wt% 乙醇肉汤的燃料乙醇。与吸附技术耦合的结果相比，每吨燃料乙醇节省了 0.25 吨蒸汽。还研究了肉汤中乙醇含量对能量效率的影响，这表明乙醇含量是决定耦合技术能耗的决定性因素。操作压力对于平衡与 VP 膜耦合的色谱柱之间的能耗至关重要。研究发现，低压塔的运行压力是整个能效的决定性因素，而高压塔的压力因系统扰动较少，优选根据实际生产情况进行调整。这项工作有利于发酵液生产燃料乙醇的工艺设计。研究发现，低压塔的运行压力是整个能效的决定性因素，而高压塔的压力因系统扰动较少，优选根据实际生产情况进行调整。这项工作有利于发酵液生产燃料乙醇的工艺设计。研究发现，低压塔的运行压力是整个能效的决定性因素，而高压塔的压力因系统扰动较少，优选根据实际生产情况进行调整。这项工作有利于发酵液生产燃料乙醇的工艺设计。
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