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Experimental study of steam and carbon dioxide microwave plasma for advanced thermal treatment application

Experimental study of steam and carbon dioxide microwave plasma for advanced thermal treatment application
Experimental study of steam and carbon dioxide microwave plasma for advanced thermal treatment application
Pollution reduction from waste management and energy generation is necessary to mitigate climate change and is one of the major challenges of the 21st century. This can be achieved through the development of innovative energy recovery technologies from biomass and wastes, such as microwave plasma gasification. An envelope of stable CO2 plasma operation is described, by varying working gas flow rate at applied microwave powers between 1 and 6 kW, whereas H2O plasma operation is possible with flow rate ranging from 20 to 50 g/min and microwave powers between 2.5 and 6 kW. The temperature generated in a large chamber connected to the plasma torch is recorded, reaching up to 850 °C, showing a heterogeneous temperature distribution. In addition, optical emission spectroscopy measurements provide an insight into plasma chemistry and demonstrate the dissociation of CO2 and H2O molecules at extremely high temperatures of up to 6300 °C assuming local thermodynamic equilibrium. The experimental results demonstrate that the microwave plasma torch provides an ideal environment for gasification with high temperature and very chemically reactive species. This study provides valuable information for the design of microwave plasma gasification reactors with great potential for effective solid feedstock conversion into high quality syngas for energy production.
Microwaves, Plasma, Carbon dioxide, Steam, Gasification
0360-5442
1-9
Vecten, S.
cde56c21-45fa-400a-aec5-92369eac08e6
Wilkinson, M.
7eb3df26-164f-4dae-807d-c3fb684c56b8
Martin, A.
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Dexter, A.
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Bimbo, N.
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Dawson, R.
af20fae6-9dec-4053-9923-0c55a15d24b2
Herbert, B.
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Vecten, S.
cde56c21-45fa-400a-aec5-92369eac08e6
Wilkinson, M.
7eb3df26-164f-4dae-807d-c3fb684c56b8
Martin, A.
a54fab7d-a12f-4d3a-8088-ac54547aa016
Dexter, A.
9bf8be13-400f-4980-a9c5-00110214028d
Bimbo, N.
53d9fc24-e2c1-4e2d-8d75-8dc640d8adda
Dawson, R.
af20fae6-9dec-4053-9923-0c55a15d24b2
Herbert, B.
6c768449-1833-4b20-b466-1a4d5c4e6f31

Vecten, S., Wilkinson, M., Martin, A., Dexter, A., Bimbo, N., Dawson, R. and Herbert, B. (2020) Experimental study of steam and carbon dioxide microwave plasma for advanced thermal treatment application. Energy, 207, 1-9. (doi:10.1016/j.energy.2020.118086).

Record type: Article

Abstract

Pollution reduction from waste management and energy generation is necessary to mitigate climate change and is one of the major challenges of the 21st century. This can be achieved through the development of innovative energy recovery technologies from biomass and wastes, such as microwave plasma gasification. An envelope of stable CO2 plasma operation is described, by varying working gas flow rate at applied microwave powers between 1 and 6 kW, whereas H2O plasma operation is possible with flow rate ranging from 20 to 50 g/min and microwave powers between 2.5 and 6 kW. The temperature generated in a large chamber connected to the plasma torch is recorded, reaching up to 850 °C, showing a heterogeneous temperature distribution. In addition, optical emission spectroscopy measurements provide an insight into plasma chemistry and demonstrate the dissociation of CO2 and H2O molecules at extremely high temperatures of up to 6300 °C assuming local thermodynamic equilibrium. The experimental results demonstrate that the microwave plasma torch provides an ideal environment for gasification with high temperature and very chemically reactive species. This study provides valuable information for the design of microwave plasma gasification reactors with great potential for effective solid feedstock conversion into high quality syngas for energy production.

Text
Experimental MPT_Accepted_manuscript - Accepted Manuscript
Restricted to Repository staff only until 20 July 2021.
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More information

Accepted/In Press date: 6 June 2020
e-pub ahead of print date: 20 June 2020
Published date: 15 September 2020
Keywords: Microwaves, Plasma, Carbon dioxide, Steam, Gasification

Identifiers

Local EPrints ID: 442235
URI: http://eprints.soton.ac.uk/id/eprint/442235
ISSN: 0360-5442
PURE UUID: 08efb607-7368-4709-a035-267f8a32ed84
ORCID for N. Bimbo: ORCID iD orcid.org/0000-0001-8740-8284

Catalogue record

Date deposited: 09 Jul 2020 16:31
Last modified: 07 Oct 2020 02:26

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Contributors

Author: S. Vecten
Author: M. Wilkinson
Author: A. Martin
Author: A. Dexter
Author: N. Bimbo ORCID iD
Author: R. Dawson
Author: B. Herbert

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