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Effect of Methane as an Additive in the Product Gas toward the Formation of Lower Hydrocarbons during the Decomposition of a Tar Analogue

Lookup NU author(s): Faisal Saleem, Abdul Rehman, Dr Kui Zhang, Professor Adam Harvey



This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Chemical Society, 2020.

For re-use rights please refer to the publisher's terms and conditions.


Copyright © 2019 American Chemical Society. Nonthermal plasma is being considered as an alternative technique to reduce gasification tars. In this study, a dielectric barrier discharge reactor was used to decompose toluene (tar representative) in a synthetic product gas (CH4, CO, CO2, and H2). It was observed that the presence of methane in a model product gas significantly increased the selectivity of C2 (C2H6 + C2H4) hydrocarbons when increasing the temperature up to 400 °C at constant power (40 W). The effect of specific input energy (SIE) (2.05-16.4 kW h/m3) and temperature (20-400 °C) was investigated. The conversion of a tar model compound (toluene) increased at higher SIE. Solid residues and lower hydrocarbons (LHC) formed at ambient temperature. Solid residues create operational problems, but here we observe that the effect can be substantially reduced by operating at high temperatures. Solid formation was significantly decreased at 400 °C and 40 W. Furthermore, the selectivity of LHC (C2-C6) increased to 77%. However, CH4 decomposition decreased at high temperature because of the formation of methane at elevated temperatures.

Publication metadata

Author(s): Saleem F, Umer J, Rehman A, Zhang K, Harvey A

Publication type: Article

Publication status: Published

Journal: Energy and Fuels

Year: 2020

Volume: 34

Issue: 2

Pages: 1744-1749

Print publication date: 20/02/2020

Online publication date: 09/12/2019

Acceptance date: 04/12/2019

Date deposited: 17/02/2020

ISSN (print): 0887-0624

ISSN (electronic): 1520-5029

Publisher: American Chemical Society


DOI: 10.1021/acs.energyfuels.9b02309


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