Acid gases partial pressures above a 50 wt % aqueous methyldiethanolamine solution: Experimental work and modeling

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• 作者：Moussa Dicko ; Christophe Coquelet ; Carmen Jarne ; Scott Northrop ; Dominique Richon
• 关键词：Acid gas data ; MDEA ; Carbon dioxide ; Hydrogen sulfide ; Modeling ; Gas processing
• 刊名：Fluid Phase Equilibria
• 出版年：2010
• 出版时间：15 March 2010
• 年：2010
• 卷：289
• 期：2
• 页码：99-109
• 全文大小：1138 K

文摘

Aqueous amine solutions are widely used in the industry for acid gas removal. In order to treat natural gas or refinery process streams, an accurate knowledge of solubility data of carbon dioxide, hydrogen sulfide and other sulfur species in aqueous amine solutions is required. In this paper, new equilibrium measurements on 50 wt % aqueous methyldiethanolamine solution with CO₂ and H₂S have been produced. A simple way to correlate the data has been searched and found. First, a model proposed by Posey et al. in 1996, then a Deshmukh–Mather model are used to correlate “vapor–liquid” equilibria. The Posey et al. model lacks accuracy to represent the experimental data, especially for high loadings. The Deshmukh–Mather model shows good agreement as long as the total loading (H₂S + CO₂) does not reach 1.0.