Ammonia based CO2 capture process using hollow fiber membrane contactors

Due to its low regeneration energy demands relative to MEA, ammonia is one of the most attractive solvents for post-combustion CO2 capture processes. Nevertheless, additionally to a lower kinetic constant, a high ammonia slip takes place when the absorption process is performed in a packed column. I...

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Bibliographic Details
Published in:Journal of membrane science 2014-04, Vol.455, p.236-246
Main Authors: Makhloufi, Camel, Lasseuguette, Elsa, Remigy, Jean Christophe, Belaissaoui, Bouchra, Roizard, Denis, Favre, Eric
Format: Article
Language:English
Subjects:
Absorption
Ammonia
Carbon capture
Carbon capture and storage
Carbon dioxide
Chemical and Process Engineering
Chemical engineering
Chemical Sciences
Chemistry
CO2
Colloidal state and disperse state
Contactors
Engineering Sciences
Exact sciences and technology
Fibers
General and physical chemistry
Mass transfer
Membrane contactors
Membranes
NH3
Slip
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Summary:Due to its low regeneration energy demands relative to MEA, ammonia is one of the most attractive solvents for post-combustion CO2 capture processes. Nevertheless, additionally to a lower kinetic constant, a high ammonia slip takes place when the absorption process is performed in a packed column. In this study, the feasibility of an ammonia based CO2 capture process using hollow fiber membrane contactors is investigated. CO2 absorption experiments in ammonia have been performed with porous polypropylene membranes (Oxyphan) and with two different dense skin composite hollow fibers: tailor made (Teflon AF2400) and commercial (TPX). It is shown that microporous membranes do not offer stable performances, due to salt precipitation and pore blocking. Contrarily however, dense skin membranes show stable and attracting performances, whatever the operating conditions: reduced ammonia slip and intensified CO2 mass transfer are obtained compared to packed column. The potentialities of dense skin membrane contactors, particularly based on fluorinated polymers, are discussed with regard to both increased CO2 mass transfer performances and mitigation of ammonia volatilization compared to conventional gas/liquid contactors. •Absorption performances not stable with microporous membrane contactors.•In situ precipitation in dense rubbery polymers.•Dense skin composite fibers offer stable absorption performances.•Large intensification factor compared to packed columns.•Ammonia slip mitigation compared to packed columns.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2013.12.063