Experimental investigation of a non-catalytic cold plasma water-gas shift reaction

Jaiswal, AK and Ananthanarasimhan, J and Shivapuji, AM and Dasappa, S and Rao, L (2020) Experimental investigation of a non-catalytic cold plasma water-gas shift reaction. In: Journal of Physics D: Applied Physics, 53 (46).

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Abstract

This work explores the use of an atmospheric pressure, low temperature, cold non-thermal plasma (obtained by dielectric barrier discharge (DBD)) to achieve a water-gas shift (WGS) reaction (CO + H2O H2 + CO2). This work establishes the use of a DBD to generate hydroxyl radicals that initiate and enhance the WGS reaction at low temperatures. The effect of the steam to CO molar ratio (MR) and the gas residence time on the CO conversion (X CO) to H2 is studied. The results show that, at an MR of 20, with 2600 ms of gas residence time and a plasma power of 70 W, a maximum CO conversion of 63 ± 4 can be achieved with an H2 concentration of 48 ± 2 mol in the product. Preliminary studies of reaction pathways for the enhanced hydrogen formation confirm the role of C formed from the CO2 dissociation. A reaction mechanism for the plasma WGS reaction is proposed and the hydrogen yield is calculated. © 2020 IOP Publishing Ltd.

Item Type:	Journal Article
Publication:	Journal of Physics D: Applied Physics
Publisher:	Institute of Physics Publishing
Additional Information:	The copyright of this article belongs to Institute of Physics Publishing
Keywords:	Atmospheric pressure; Carbon dioxide; Chemical shift; Dielectric devices; Dielectric materials; Electric discharges; Hydrogen production; Molar ratio; Temperature, Dielectric barrier discharges; Experimental investigations; Gas residence time; Hydroxyl radicals; Nonthermal plasma; Reaction mechanism; Reaction pathways; Water gas shift (WGS) reaction, Water gas shift
Department/Centre:	Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited:	23 Sep 2020 11:27
Last Modified:	23 Sep 2020 11:27
URI:	http://eprints.iisc.ac.in/id/eprint/66595

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