Acid gases partial pressures above a 50 wt% aqueous methyldiethanolamine solution: Experimental work and modeling |
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Authors: | Moussa Dicko Christophe Coquelet Carmen Jarne Scott Northrop Dominique Richon |
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Institution: | 1. Mines ParisTech, Laboratoire CEP/TEP 35, rue Saint Honoré, 77305 Fontainebleau cedex, France;2. Gas Technologies Section, Gas and Facilities Division, ExxonMobil Upstream Research Company, ExxonMobil, Houston, TX, USA |
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Abstract: | 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. |
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Keywords: | Acid gas data MDEA Carbon dioxide Hydrogen sulfide Modeling Gas processing |
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