TY - JOUR
T1 - The study on the coupled process of column distillation and vapor permeation by NaA zeolite membrane for ethanol dehydration
AU - Gao, Xuechao
AU - Wang, Shengxian
AU - Wang, Jiacheng
AU - Xu, Shufeng
AU - Gu, Xuehong
N1 - Publisher Copyright:
© 2019 Institution of Chemical Engineers
PY - 2019/10
Y1 - 2019/10
N2 - A pilot was used to experimentally study the ethanol dehydration process, based on the coupled process of distillation and vapor permeation by NaA zeolite membrane, and the effects of the water content in the feed, reflux ratio, mass flow, the product purity of the distill and the operating stability were systematically analyzed. It was found that due to the placement of NaA membrane, the operation zone of the original column could be significantly extended in the coupling, which in return could reduce the column facility investment. Based on the interplay among the operation parameters, it was found that the water content of the distilled product from the column could be used as a critical parameter to balance the energy consumption of the column and the membrane facility investment, and a value of 20 wt.% was recommended for the coupling. During the steady test of the coupling, the results indicated that the pilot plant could be continuously operated for 18 h to dehydrate the feed (water/ethanol) from 60 wt.% to 8 wt.%, where the steady state was further validated in process simulation of Aspen plus. In summary, the parameters suitable for the stable operation of the distillation-vapor permeation coupling were investigated for the given condition. This research paves a foundation for the large-scale industrial design and application of the distillation-vapor permeation coupling.
AB - A pilot was used to experimentally study the ethanol dehydration process, based on the coupled process of distillation and vapor permeation by NaA zeolite membrane, and the effects of the water content in the feed, reflux ratio, mass flow, the product purity of the distill and the operating stability were systematically analyzed. It was found that due to the placement of NaA membrane, the operation zone of the original column could be significantly extended in the coupling, which in return could reduce the column facility investment. Based on the interplay among the operation parameters, it was found that the water content of the distilled product from the column could be used as a critical parameter to balance the energy consumption of the column and the membrane facility investment, and a value of 20 wt.% was recommended for the coupling. During the steady test of the coupling, the results indicated that the pilot plant could be continuously operated for 18 h to dehydrate the feed (water/ethanol) from 60 wt.% to 8 wt.%, where the steady state was further validated in process simulation of Aspen plus. In summary, the parameters suitable for the stable operation of the distillation-vapor permeation coupling were investigated for the given condition. This research paves a foundation for the large-scale industrial design and application of the distillation-vapor permeation coupling.
KW - Column distillation
KW - Coupled process
KW - Ethanol dehydration
KW - NaA zeolite membranes
KW - Vapor permeation
UR - http://www.scopus.com/inward/record.url?scp=85070852678&partnerID=8YFLogxK
U2 - 10.1016/j.cherd.2019.08.003
DO - 10.1016/j.cherd.2019.08.003
M3 - 文章
AN - SCOPUS:85070852678
SN - 0263-8762
VL - 150
SP - 246
EP - 253
JO - Chemical Engineering Research and Design
JF - Chemical Engineering Research and Design
ER -
