Experimental and kinetic study of the catalytic desorption of CO2 from CO2-loaded monoethanolamine (MEA) and blended monoethanolamine – Methyl-diethanolamine (MEA-MDEA) solutions

Ananda Akachuku, Priscilla Anima Osei, Benjamin Decardi-Nelson, Wayuta Srisang, Fatima Pouryousefi, Hussameldin Ibrahim and Raphael Idem

Energy, 2019, vol. 179, issue C, 475-489

Abstract: The kinetics of catalyst-aided desorption of CO2 from CO2-loaded MEA (5 mol/dm3) and blended MEA-MDEA (7 mol/dm3) solutions at CO2 loadings from 0.3 to 0.5 mol CO2/mol amine were studied over a Lewis acid catalyst (γ-Al2O3) and a Brønsted acid catalyst (H-ZSM-5) in an absorber–desorber CO2 capture bench-scale plant (columns of 0.051 m ID and height of 1.067 m) at temperatures of 348–368 K. The results showed that the conversion increases relative to no catalyst for MEA were 55 and 74% while for MEA-MDEA, they were 65 and 85.2% with γ-Al2O3 and H-ZSM-5, respectively. A comprehensive mechanistic LHHW rate model was developed for the catalytic CO2 desorption process.

Keywords: CO2 desorption; Solid acid catalyst; Kinetics; Mechanistic model; Activation energy; Acid sites (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (8)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:179:y:2019:i:c:p:475-489

DOI: 10.1016/j.energy.2019.04.174

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