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Equilibrium and absorption kinetics of carbon dioxide by solid supported amine sorbent
Author(s) -
Monazam Esmail R.,
Shadle Lawrence J.,
Siriwardane Ranjani
Publication year - 2011
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.12516
Subject(s) - sorbent , chemistry , carbon dioxide , amine gas treating , diffusion , equilibrium constant , adsorption , thermodynamics , chemical equilibrium , absorption (acoustics) , partial pressure , kinetics , reaction rate constant , dynamic equilibrium , materials science , organic chemistry , composite material , physics , quantum mechanics , oxygen
The equilibrium and conversion‐time data on the absorption of carbon dioxide (CO 2 ) with amine‐based solid sorbent were analyzed over the range of 303–373 K. Data on CO 2 loading on amine based solid sorbent at these temperatures and CO 2 partial pressure between 10 and 760 mm Hg obtained from volumetric adsorption apparatus were fitted to a simple equilibrium model to generate the different parameters (including equilibrium constant) in the model. Using these constants, a correlation was obtained to define equilibrium constant and maximum CO 2 loading as a function of temperature. In this study, a shrinking core model (SCM) was applied to elucidate the relative importance of pore diffusion and surface chemical reaction in controlling the rate of reaction. Application of SCM to the data suggested a surface reaction‐controlled mechanism for the temperature of up to 40°C and pore‐diffusion mechanism at higher temperature. Published 2011 American Institute of Chemical Engineers AIChE J, 2011