Critical Assessment of the Energy-Saving Potential of an Extractive Dividing-Wall Column

被引：120

作者：

Wu, Yi Chang ^{[1
]}

Hsu, Paul Hen-Chia ^{[1
]}

Chien, I-Lung ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2013年 / 52卷 / 15期

关键词：

BIOETHANOL DEHYDRATION; REACTIVE-DISTILLATION; DESIGN; OPTIMIZATION;

D O I：

10.1021/ie3035898

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this paper, the energy-saving potential of an extractive dividing-wall column (EDWC) is investigated. One potential drawback on the EDWC design is that two reboilers in the original design need to be combined into one reboiler. Since a heavy entrainer is used in the extractive distillation system, often cases show that the total reboiler duty is reduced but with adversely increasing the total steam cost. Three industrial separation systems of isopropyl alcohol-water, dimethyl carbonate-methanol, and acetone-methanol have been used as demonstrating examples for critical assessment of the energy-saving potential of the EDWC design. It is found that although the savings of the overall reboiler duty can be made by using the EDWC design, only the acetone-methanol system using water as an entrainer actually saves on the steam cost. The control performance of the EDWC design is also hampered because of losing one important control degree-of-freedom.

引用

页码：5384 / 5399

页数：16