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Equilibrium solubility measurement and Kent‐Eisenberg modeling of CO 2 absorption in aqueous mixture of N‐methyldiethanolamine and hexamethylenediamine
Author(s) -
Mondal Bikash K.,
Bandyopadhyay Syamalendu S.,
Samanta Amar N.
Publication year - 2017
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.1653
Subject(s) - hexamethylenediamine , chemistry , solubility , aqueous solution , equilibrium constant , deprotonation , solubility equilibrium , amine gas treating , chemical equilibrium , analytical chemistry (journal) , thermodynamics , inorganic chemistry , chromatography , polymer chemistry , organic chemistry , ion , polyamide , physics
Vapor‐liquid equilibrium of CO 2 in aqueous mixture of hexamethylenediamine (HMDA) and N‐methyldiethanolamine (MDEA) has been investigated using a stirred equilibrium cell set‐up in the temperature and pressure range of 303–333K and 1–100kPa, respectively. Composition of the mixed amine solvents used are (5mass% HMDA+25mass% MDEA), (10 mass% HMDA+20 mass% MDEA), (15mass% HMDA+15mass% MDEA), and (20 mass% HMDA+10 mass% MDEA). Equilibrium solubility data is fitted using the Kent‐Eisenberg thermodynamic model. To fit experimental solubility data with model predicted data, bicarbamate formation and zwitterion deprotonation reaction equilibrium constants of HMDA are regressed as a function of CO 2 loading and temperature. Average absolute deviation between experimental and model predicted data is found to be 7.16%. © 2016 Society of Chemical Industry and John Wiley & Sons, Ltd.