Ethanol and isobutanol dehydration by heat-integrated distillation

被引：32

作者：

Grisales Diaz, Victor Hugo ^{[1
]}

Olivar Tost, Gerard ^{[1
]}

机构：

[1] Univ Nacl Colombia, Dept Elect Elect & Computat Engn, Percept & Intelligent Control, Cra 27 64-60, Manizales, Colombia

来源：

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 2016年 / 108卷

关键词：

Extractive; Pressure swing distillation; Heat-pump; Intensification; VAPOR PERMEATION PROCESS; EXTRACTIVE DISTILLATION; CLOSTRIDIUM-BEIJERINCKII; BIOETHANOL DEHYDRATION; BUTANOL; RECOVERY; SEPARATION; ACETONE; ACETONE/BUTANOL/ETHANOL; 1-BUTANOL;

D O I：

10.1016/j.cep.2016.07.005

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Alternative processes with double-effect distillation (DED) and vapor compression distillation (VCD) were studied for ethanol and isobutanol dehydration from dilute concentrations. The extractants evaluated for ethanol dehydration were glycerol and ethylene glycol. Simulations were performed in Aspen Plus (R). The lowest energy consumption for ethanol and isobutanol dehydration were achieved by VCD (2.5 and 3.7 MJ-fuel/kg-product, respectively). The energy consumption for isobutanol and ethanol separations with VCD were 25-30% and 39-40% lower than DED, respectively. Due to the high cost of the compressors, VCD was between 9 and 16% more expensive than DED. Due to the higher ethanol concentration from the fermentation broth, the separation annualized costs and the fuel requirement for ethanol dehydration were 37-44% and 32-46% lower than butanol separation, respectively. However, the energy efficiency, with a maximum theoretical yield from glucose, for isobutanol and ethanol processes was approximately equivalent, 72-73% (DED) and 77% (VCD), due to the higher combustion heat of isobutanol. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：117 / 124

页数：8