Thermodynamic modeling for the solubility of carbon dioxide and ethyl-mercaptan in aqueous N-methyldiethanolamine and sulfolane by using an Electrolyte Segmental Wilson-Nonrandom local composition model
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Chemical Engineering, Tarbiat Modares University, Tehran, Iran
Removal of acid gases and mercaptans from natural gas is necessary for gas treatment industry. Moreover, carbon dioxide capturing is an important step for protection of the environment. An accurate thermodynamic model is a primary element needed for the process simulation and optimization for CO2 absorption in aqueous amine solutions.In this work, the solubility of CO2 and ethyl-mercaptan in aqueous mixture of N-methyldiethanolamine (MDEA) as a chemical solvent and sulfolane as a physical solvent are modeled by using an Electrolyte Segmental Wilson-Nonrandom in different temperature and various compositions. New adjustable binary interaction parameters are regressed and reported. The results of AAD% for the present systems were 15.81%.
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