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CO 2 /CH 4 separation by facilitated transport in amine‐polyethylene glycol mixtures
Author(s) -
Davis Richard A.,
Sandall Orville C.
Publication year - 1993
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.690390706
Subject(s) - diethanolamine , polyethylene glycol , amine gas treating , zwitterion , chemistry , membrane , chemical engineering , methane , kinetics , polyethylene , separation process , chromatography , organic chemistry , molecule , biochemistry , physics , quantum mechanics , engineering
In this work, the separation of carbon dioxide from methane by reactive liquid membranes consisting of the secondary amines, diethanolamine, and diisopropanolamine in polyethylene glycol with an average molecular weight of 400 was studied. A mathematical model was developed to describe the transport process. This model employs the zwitterion mechanism for the CO 2 amine reaction kinetics. Membrane flux experiments utilizing a flat plate device were carried out to verify the model predictions. It was found that large permeabilities and separations were achieved for low CO 2 feed concentrations. The results also show that DEA based solutions give better separation than DIPA based solutions.