کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
203197 460641 2008 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The solubility of carbon dioxide in aqueous N-methyldiethanolamine solutions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
The solubility of carbon dioxide in aqueous N-methyldiethanolamine solutions
چکیده انگلیسی

In this study the electrolyte equation of state as proposed by Solbraa [E. Solbraa, Equilibrium and non-equilibrium thermodynamics of natural gas processing, Ph.D. thesis Norwegian University of Science and Technology, 2002] was systematically studied and improved to describe the solubility of carbon dioxide in aqueous solutions of N-methyldiethanolamine quantitatively. In this electrolyte equation of state approach both the vapour phase and the liquid phase are described with an equation of state. The molecular part of the equation is based on Schwarzentruber's [J. Scharzentruber, H. Renon, S. Watanasiri, Fluid Phase Equilib. 52 (1989) 127–134] modification of the Redlich-Kwong equation of state with the Huron–Vidal mixing rule [M.J. Huron, J. Vidal, Fluid Phase Equilib. 3 (1979) 255–271]. Three ionic terms are added to this equation—a short-range ionic term, a long-range ionic term (MSA) and a Born term. The thermodynamic model has the advantage that it reduces to a standard cubic equation of state if no ions are present in the solution, and that publicly available interaction parameters used in the Huron–Vidal mixing rule can be utilized. In this work binary molecular- and ionic interaction parameters were studied and optimized. With the updated model it was possible to describe both low- and high pressure vapour–liquid-equilibrium for the MDEA–H2O–CO2–CH4 system satisfactorily.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 264, Issues 1–2, 1 March 2008, Pages 99–112
نویسندگان
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