Premium
Solubility of CO 2 in (H 2 O+piperazine) and in (H 2 O+MDEA+piperazine)
Author(s) -
Kamps Álvaro PérezSalado,
Xia Jianzhong,
Maurer Gerd
Publication year - 2003
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690491019
Subject(s) - piperazine , molality , solubility , chemistry , aqueous solution , carbon dioxide , thermodynamics , inorganic chemistry , organic chemistry , physics
A thermodynamic model for describing the phase equilibrium for the system CO 2 +methyldiethanolamine+water has been extended, allowing for the presence of piperazine. Model parameters are estimated from new experimental results for the solubility of carbon dioxide in aqueous solutions of piperazine (for piperazine molalities up to 4 mol per kilogram of water, temperatures between 313 and 393 K, and pressures up to about 9.6 MPa). The model is tested by comparing predicted and experimental carbon dioxide solubilities in aqueous mixtures of both amines (2 molal MDEA+2 molal piperazine, at 353 K, and pressures up to about 6.4 MPa).