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http://dx.doi.org/10.9713/kcer.2011.49.2.256

Characteristics of $CO_{2}$ Absorption and Degradation of Aqueous Alkanolamine Solutions in $CO_{2}$ and $CO_{2}-O_{2}$ System  

Choi, Won-Joon (Fuel Cell System Development Team, Doosan Heavy Industries & Construction)
Lee, Jong-Seop (Greenhouse Gas Research Center, Korea Institute of Energy Research)
Han, Keun-Hee (Greenhouse Gas Research Center, Korea Institute of Energy Research)
Min, Byoung-Moo (Greenhouse Gas Research Center, Korea Institute of Energy Research)
Publication Information
Korean Chemical Engineering Research / v.49, no.2, 2011 , pp. 256-262 More about this Journal
Abstract
Amine can undergo irreversible reactions by $O_{2}$ and high temperature in amine scrubbing process and these phenomena are called "degradation". Degradation causes not only a loss of valuable amine, but also operational problems such as foaming, corrosion and fouling. In this study, using various chemical absorbents(MEA; monoethanolamine, AMP; 2-amino-2-methyl-1-propanol, DAM; 1,8-diamino-p-menthane), we examined the following variable. I) loading ratio of $CO_{2}$ at $50^{\circ}C$ and $120^{\circ}C$, ii) concentration variation and initial degradation rate constant of absorbent in $CO_{2}$ and $CO_{2}/O_{2}$ system, and iii) effect of degradation by $O_{2}$. The $CO_{2}$ loading of 20 wt% DAM was 400% and 270% higher than that of 20 wt% MEA and AMP at 50, respectively and was the largest the difference of $CO_{2}$ loading between absorption $(50^{\circ}C)$ and regeneration $(120^{\circ}C)$ condition. The initial degradation rate constant of 20 wt% DAM was $2.254{\times}10^{-4}cycle^{-1}$ which was slower than that of MEA $(2.761{\times}10^{-4}cycle^{-1})$ and AMP $(2.461{\times}10^{-4}cycle^{-1})$ in $CO_{2}$ system. Also, it was increased 30% by $O_{2}$ that effects on the degradation by $O_{2}$ was less than 100% increased. these degradation reactions was able to identify by formation of new peak in GC and FT-IR spectrum analysis.
Keywords
$CO_{2}$; $O_{2}$; Absorption; Degradation; Alkanolamine;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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