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Gas-phase controlled mass transfer in a foam-bed reactor

Bhaskarwar, Ashok N and Kumar, R (1995) Gas-phase controlled mass transfer in a foam-bed reactor. In: Chemical Engineering Communications, 131 . pp. 115-124.

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Gas-phase controlled absorption of ammonia in foams made of solutions of sulphuric acid has been studied experimentally. Effects of gas-phase concentration of ammonia and type of surfactant on the performance of the foam-bed reactor are investigated. Gas-phase controlled absorption from a spherical bubble is anaylzed using the asymptotic value of Sherwood number (Sh = 6.58), for both negligible as well as significant changes in the volume of the bubble. The experimental data are shown to be in good agreement with the single-stage model of the foam-bed reactor using these asymptotic sub-models, as well as the diffusion-in-sphere analysis available in literature. Influence of effective diffusivity on the time dependence of fractional gas absorption has been found to be unimportant for foam columns with large times of contact. The asymptotic sub-models have been compared and use of the rigid-sphere asymptotic sub-model is recommended for foam columns of practical relevence.

Item Type: Journal Article
Publication: Chemical Engineering Communications
Publisher: Taylor and Francis Group
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 31 May 2011 08:46
Last Modified: 27 Feb 2019 05:21
URI: http://eprints.iisc.ac.in/id/eprint/38011

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