Modeling and Experimental Study of CO₂ Removal by Alkanolamines in a Packed Bed

Abstract

Absorption of CO₂ by monoethanolamine, diethanolamine, and triethanolamine solutions in a lab–scale packed bed tower was investigated. A model for analyzing the heat and mass transfer mechanism in the presence of reaction was developed and validated using the measured data for MEA and TEA solutions and the results were compared with the others' experimental data. The well-known correlations for determining Henry's constant, as a critical parameter in the presented model, were evaluated and it was shown that the available correlations are often limited to a narrow range of operating conditions which could limit the applicability of the available models.

Keywords:

• alkanolamines
• carbon dioxide
• packed bed
• reactive absorption

Notes

^a)In these equations group R is HOC₂H₄.