Equilibrium solubility of carbon dioxide in N-methyldiethanolamine + piperazine aqueous solution: Experimental measurement and prediction

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• 作者：Hesam Najibi ; Nima Maleki
• 关键词：Solubility ; Carbon dioxide ; N-methyldiethanolamine ; Piperazine ; Deshmukh&ndash ; Mather model
• 刊名：Fluid Phase Equilibria
• 出版年：2013
• 出版时间：25 September, 2013
• 年：2013
• 卷：354
• 期：Complete
• 页码：298-303
• 全文大小：437 K

文摘

New experimental data for equilibrium solubility of carbon dioxide in aqueous solutions of N-methyldiethanolamine (MDEA) and piperazine (PZ) are reported for temperature range of 363-423 K and pressure range of 26.3-204.3 kPa. The measured data in combination with the data collected from literature are used to modify Deshmukh-Mather model for prediction of the solubility of carbon dioxide in MDEA + PZ solutions. In this model, a modified extended Debye-H¨¹ckel expression for electrolyte solutions is used for the calculation of activity coefficients. More than 300 data points in a wide range of temperatures, pressures and concentrations are used to optimize the interaction parameters for the studied system. Genetic Algorithm minimization technique is used for this optimization process. The gas-phase fugacity coefficients are also included and are calculated using Peng-Robinson equation of state. The predictions of the proposed model are compared with the experimental data reported by Liu et al. The results show a very good agreement between experimental data and model predictions.