کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10271660 460827 2005 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermodynamics of aqueous potassium carbonate, piperazine, and carbon dioxide
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Thermodynamics of aqueous potassium carbonate, piperazine, and carbon dioxide
چکیده انگلیسی
A rigorous thermodynamic model was developed, based on the electrolyte nonrandom two-liquid (ENRTL) theory, to describe the equilibrium behavior of the solvent. Modeling work established that the carbamate stability of piperazine and piperazine carbamate resembles primary amines and gives approximately equal values for the heats of reaction, ΔHrxn (18.3 and 16.5 kJ/mol). The pKa of piperazine carbamate is twice that of piperazine, but the ΔHrxn values are equivalent (∼−45 kJ/mol). Overall, the heat of CO2 absorption is lowered by the formation of significant quantities of HCO3− in the mixed solvent and strongly depends on the relative concentrations of K+ and PZ, ranging from −40 to −75 kJ/mol.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 227, Issue 2, 25 January 2005, Pages 197-213
نویسندگان
, ,