Article (Scientific journals)
Relevance of accelerated conditions for the study of monoethanolamine degradation in post-combustion CO2 capture.
Léonard, Grégoire; Toye, Dominique; Heyen, Georges
2014In Canadian Journal of Chemical Engineering, 93 (2), p. 348
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This is the peer reviewed version of the following article: "Relevance of accelerated conditions for the study of monoethanolamine degradation in post-combustion CO2 capture", which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/cjce.22094/abstract


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Keywords :
Clean coal technologies; Absorption; Energy; Post-combustion CO2 capture; Monoethanolamine solvent; Accelerated degradation; Industrial representativity
Abstract :
[en] Solvent degradation represents one of the main operational drawbacks of the post-combustion CO2 capture process. Degradation not only induces additional costs for solvent make-up, it also impacts the process efficiency and its environmental penalty due to the emission of various degradation products. There is still a gap of knowledge about the influence of process operating conditions on degradation, making it currently impossible to predict the solvent degradation rate in CO2 capture plants. Morever, the reaction mechanisms corresponding to solvent degradation are very slow, significantly complicating its study in industrial units. In the present work, appropriate experimental equipment and analytical methods are developed for accelerating the degradation of monoethanolamine solvents (MEA). The relevance of accelerated conditions is established by comparing artificially degraded solvent samples with degraded solvent samples from industrial CO2 capture pilot plants. Two approaches are evaluated implying either discontinuous or continuous gas feed, this latest being the most representative of industrial degradation. The respective influences of the gas feed composition and the gas-liquid transfer are evidenced and quantified. Finally, the present study leads to a better understanding of solvent degradation in the CO2 capture process with MEA. More generally, it also evidences that accelerated conditions at laboratory-scale may provide relevant information for the study of slow phenomena taking place in large-scale industrial processes. Further works include the development of a kinetic model for MEA solvent degradation and the extension of this methodology to other promising solvents in order to facilitate the operation and large-scale deployment of CO2 capture.
Disciplines :
Chemical engineering
Author, co-author :
Léonard, Grégoire  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Toye, Dominique  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques
Heyen, Georges ;  Université de Liège - ULiège > Département de chimie appliquée > Département de chimie appliquée
Language :
English
Title :
Relevance of accelerated conditions for the study of monoethanolamine degradation in post-combustion CO2 capture.
Publication date :
2014
Journal title :
Canadian Journal of Chemical Engineering
ISSN :
0008-4034
Publisher :
Chemical Institute of Canada, Ottawa, Canada
Volume :
93
Issue :
2
Pages :
348
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
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