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Equilibrium behaviour of a novel gas separation process, with application to carbon capture

Sweatman, Martin B. (2010) Equilibrium behaviour of a novel gas separation process, with application to carbon capture. Chemical Engineering Science, 65 (13). pp. 3907-3913. ISSN 0009-2509

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Abstract

A novel gas separation process is described and analysed in the context of carbon capture. It involves a highly selective absorbent fluid below its saturation pressure pre-mixed with the gas to be separated and absorbed in to a porous solid. This fluid mixture simultaneously forms gas-like and liquid-like regions within the porous solid depending on the pore size. The gas component to be separated is process is used to recover the absorbed gas. This work examines the equilibrium behaviour of this process in the context of carbon capture using the density functional theory (DFT) of classical fluids. The DFT model employed represents the porous solid in terms of ideal graphite slit-pores, and a ternary fluid model is calibrated to represent mixtures of tetrahydrofuran (the absorbent fluid), carbon dioxide and nitrogen. Under the conditions investigated here we find that the equilibrium behaviour of this system is superior to the analogous pressure-swing adsorption process without solvent. This result motivates further experimental and dynamical process modelling studies of this system. (C) 2010 Elsevier Ltd. All rights reserved.

Item type: Article
ID code: 30982
Keywords: carbon capture, porous media, liquids, adsorption, separations, density functional theory, Tetrahydrofuran, formaldehyde, Chemical engineering, Chemical Engineering(all), Chemistry(all), Applied Mathematics, Industrial and Manufacturing Engineering
Subjects: Technology > Chemical engineering
Department: Faculty of Engineering > Chemical and Process Engineering
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Depositing user: Pure Administrator
Date Deposited: 13 May 2011 16:18
Last modified: 27 Mar 2014 09:20
URI: http://strathprints.strath.ac.uk/id/eprint/30982

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