Experimental study on the solvent regeneration of a CO2‐loaded MEA solution using single and hybrid solid acid catalysts |
| |
| Authors: | Zhiwu Liang Raphael Idem Paitoon Tontiwachwuthikul Fanghui Yu Helei Liu Wichitpan Rongwong |
| |
| Affiliation: | 1. Joint International Center for CO2 Capture and Storage (iCCS), Provincial Hunan Key Laboratory for Cost‐effective Utilization of Fossil Fuel Aimed at Reducing Carbon‐dioxide Emissions, Department of Chemical Engineering, College of Chemistry and Chemical Engineering, Hunan University, Changsha, P.R. China;2. Clean Energy Technologies Institute, University of Regina, Regina, Saskatchewan, Canada |
| |
| Abstract: | The performance of a hybrid solid acid catalyst consisting of a physical mixture of γ‐Al2O3 and H‐ZSM‐5 in terms of the rate and heat duty for solvent regeneration (i.e., CO2 stripping) of a CO2‐rich MEA solution was compared with the individual performance of γ‐Al2O3, H‐ZSM‐5, and H‐Y solid acid catalysts using MEA (2–7 mol/L), with initial CO2 loading of 0.5 mol CO2/mol MEA at 378 K. It was observed that any catalyst significantly decreased the energy required for CO2 regeneration. The performance of the catalysts investigated ranked as follows: γ‐Al2O3/H‐ZSM‐5 = 2/1 > γ‐Al2O3 > H‐ZSM‐5 > H‐Y if the process is in the lean CO2 loading region whereas it was H‐ZSM‐5 > γ‐Al2O3/H‐ZSM‐5 = 2/1 > γ‐Al2O3 > H‐Y if the process is in the rich CO2 loading region. These results highlight the joint dependence on Brønsted/Lewis acidity and mesopore surface area of heat duty for solvent regeneration. © 2015 American Institute of Chemical Engineers AIChE J, 62: 753–765, 2016 |
| |
| Keywords: | MEA solvent regeneration heat duty Brø nsted and Lewis acid sites mesopore surface area |
|
|
