Absorption of CO2 in aqueous blends of diglycolamine® and morpholine

被引：19

作者：

Al-Juaied, Mohammed ^{[1
]}

Rochelle, Gary T. ^{[1
]}

机构：

[1] Univ Texas, Dept Chem Engn, Austin, TX 78712 USA

来源：

CHEMICAL ENGINEERING SCIENCE | 2006年 / 61卷 / 12期

关键词：

absorption; desorption; kinetics; mass transfer; reaction engineering; separations;

D O I：

10.1016/j.ces.2005.12.033

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The rate of CO2 absorption in aqueous morpholine (MOR), and aqueous mixtures of MOR and diglycolamine (R) (DGA) was measured in a wetted wall contactor. 23.5 wt% MOR and 11 wt% MOR/53 wt% DGA were studied at 298-333 K. The second order rate constant for MOR at 25 degrees C, 22000 L/mol s, is four times greater than DGA. The MOR reaction with CO2 was found to be catalyzed by DGA, consistent with the zwitterion mechanism. Predictions made with a rigorous eddy diffusivity theory suggest that 11 wt% MOR/53 wt% DGA absorbs CO2 50% faster than 65 wt% DGA of the same CO2 loading. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：3830 / 3837

页数：8

共 18 条

[1]

Al-juaied MA, 2004, THESIS U TEXAS AUSTI

[2]

ALJUAIED M, 2005, ABSORPTION CO2 AQUEO

[3]

ALJUAIED M, 2005, IN PRESS J CHEM ENG

[4] KINETICS OF REACTIONS OF CARBON-DIOXIDE WITH DIGLYCOLAMINE AND MORPHOLINE [J].