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Type: Journal article
Title: Toluene addition to turbulent H₂/natural gas flames in bluff-body burners
Other Titles: Toluene addition to turbulent H2/natural gas flames in bluff-body burners
Author: Gee, A.J.
Yin, Y.
Foo, K.K.
Chinnici, A.
Smith, N.
Medwell, P.R.
Citation: International Journal of Hydrogen Energy, 2022; 47(65):1-14
Publisher: Elsevier BV
Issue Date: 2022
ISSN: 0360-3199
Statement of
Adam J. Gee, Yilong Yin, Kae Ken Foo, Alfonso Chinnici, Neil Smith, Paul R. Medwell
Abstract: A key challenge in the transition towards using hydrogen as an alternative carbon-free fuel is the reduced thermal radiation due to the absence of soot. A novel solution to this may be doping with highly sooting bio-oils. This study investigates the efficacy of toluene as a prevapourised dopant in turbulent pure hydrogen and blended hydrogen/natural gas flames as a means of improving soot loading and radiant heat transfer. All flames are stabilised on bluff-body burners to emulate the recirculation component of many industrial combustors. Total heat flux and illuminance increase non-linearly with toluene concentration for fuel blends and bluff-body diameters. By reducing the bluff-body diameter from 64 mm to 50 mm, a 20/80 (vol%) H2/natural gas mixture produces a more radiative flame than a 10/90H2/natural gas mixture in the smaller bluff-body. Opposed-flow flame simulations of soot precursors indicate that as strain rate increases, although overall soot precursor concentration decreases, a 20 vol% hydrogen mixture will produce more soot than a 10 vol% mixture. This suggests the addition of hydrogen up to 20 vol% may be beneficial for soot production in high strain environments.
Keywords: Hydrogen; Toluene; Radiation; Bluff-body; Doping
Rights: © 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
DOI: 10.1016/j.ijhydene.2022.06.154
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Appears in Collections:Mechanical Engineering publications

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