Carbon dioxide induced degradation of diethanolamine during absorption and desorption processes

Md. Sakinul Islam; Kotaiah Naik Dhanavath; Nhol Kao; Pradipto K. Bhattacharjee; Brahim Si Ali; Rozita Yusoff

doi:10.1016/j.cjche.2017.06.003

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Carbon dioxide induced degradation of diethanolamine during absorption and desorption processes

Separation Science and Engineering | Updated：2026-01-06

- Carbon dioxide induced degradation of diethanolamine during absorption and desorption processes
- Carbon dioxide induced degradation of diethanolamine during absorption and desorption processes
- 中国化学工程学报（英文版） 2018年26卷第2期页码：293-302
- Affiliations：
  
  2 Department of Chemical Engineering, Faculty of Engineering, University of Malaya,Kuala Lumpur,Malaysia,50603
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.06.003
  中图分类号：
- 纸质出版：2018
- Accepted：
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Md. Sakinul Islam, Kotaiah Naik Dhanavath, Nhol Kao, 等. Carbon dioxide induced degradation of diethanolamine during absorption and desorption processes[J]. 中国化学工程学报（英文版）, 2018,26(2):293-302.

Md. Sakinul Islam, Kotaiah Naik Dhanavath, Nhol Kao, Pradipto K. Bhattacharjee, Brahim Si Ali, Rozita Yusoff. Carbon dioxide induced degradation of diethanolamine during absorption and desorption processes[J]. Chin.J.Chem.Eng., 2018, 26(2): 293-302.
Md. Sakinul Islam, Kotaiah Naik Dhanavath, Nhol Kao, 等. Carbon dioxide induced degradation of diethanolamine during absorption and desorption processes[J]. 中国化学工程学报（英文版）, 2018,26(2):293-302. DOI： 10.1016/j.cjche.2017.06.003.

Md. Sakinul Islam, Kotaiah Naik Dhanavath, Nhol Kao, Pradipto K. Bhattacharjee, Brahim Si Ali, Rozita Yusoff. Carbon dioxide induced degradation of diethanolamine during absorption and desorption processes[J]. Chin.J.Chem.Eng., 2018, 26(2): 293-302. DOI： 10.1016/j.cjche.2017.06.003.

摘要

Abstract

Alkanolamines are widely used in the purification of the sour gas sweetening process. During the sour gas absorption process

significantly degrades the amine solvent and creates enormous problems for plant operation. In this work

induced degradation of aqueous diethanolamine (DEA) solution was conducted in a 1.25 L jacketed glass reactor that functioned as an absorber and stripper at atmospheric conditions. Pure CO

was bubbled through the reactor until the solution became saturated. In this study

the concentrations of DEA used were in the range of concentrations between 2 mol·L

-1

and 4 mol·L

-1

. In the degradation experiment

six generic cycles were conducted for each run. Each cycle was configured with the absorption and desorption of carbon dioxide at 55℃ and 100℃

respectively. Samples were collected after a predetermined experimental time and analyzed by ion chromatography (IC) to identify unknown ionic degradation products (DGPs). In the IC analysis

three different columns were used for anion

cation and ion exclusion systems

which are Metrosep A Supp 5 150/4.0

Metrosep C Supp 4 150/4.0 and Metrosep Organic Acids

respec

tively. The major identified DGPs of D01DEA2M

D02DEA3M

and D03DEA4M are nitrite

acetate and ammonium. Phosphate product was found in the degraded amine samples which might be due to the contamination of water or chromatographic system.

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