Thermal degradation of aqueous 2-aminoethylethanolamine in CO₂ capture; identification of degradation products, reaction mechanisms and computational studies

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• 作者：Idris Mohamed Saeed ; Vannajan Sanghiran Lee…
• 关键词：2 ; aminoethylethanolamine (AEEA) ; CO2 capture ; Thermal degradation ; Mechanism ; Computational study
• 刊名：Chemistry Central Journal
• 出版年：2017
• 出版时间：December 2017
• 年：2017
• 卷：11
• 期：1
• 全文大小：1265KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry/Food Science, general;
• 出版者：Springer International Publishing
• ISSN：1752-153X
• 卷排序：11

文摘

Amine degradation is the main significant problems in amine-based post-combustion CO₂ capture, causes foaming, increase in viscosity, corrosion, fouling as well as environmental issues. Therefore it is very important to develop the most efficient solvent with high thermal and chemical stability. This study investigated thermal degradation of aqueous 30% 2-aminoethylethanolamine (AEEA) using 316 stainless steel cylinders in the presence and absence of CO₂ for 4 weeks. The degradation products were identified by gas chromatography mass spectrometry (GC/MS) and liquid chromatography-time-of-flight-mass spectrometry (LC-QTOF/MS). The results showed AEEA is stable in the absence of CO₂, while in the presence of CO₂ AEEA showed to be very unstable and numbers of degradation products were identified. 1-(2-Hydroxyethyl)-2-imidazolidinone (HEIA) was the most abundance degradation product. A possible mechanism for the thermal degradation of AEEA has been developed to explain the formation of degradation products. In addition, the reaction energy of formation of the most abundance degradation product HEIA was calculated using quantum mechanical calculation.