Palacios, A and Bradley, D (2021) Conversion of natural gas jet flame burners to hydrogen. International Journal of Hydrogen Energy, 46 (33). pp. 17051-17059. ISSN 0360-3199
Abstract
In a study of conversion from CH4 to H2, jet flame characteristics of these gases and their blends are compared on a burner diameter scale of mm. Low velocity H2 and CH4 jets, burned on pipes of different diameters, indicate higher blow-off limits for H2, but lower heat release rates, a consequence of its lower specific energy. Compensation for this might be obtained through increased H2 flow velocity, or a small increase in pipe diameter. Blended CH4/H2 flames have lower heat release rates than CH4 alone, yet small proportions of H2, with CH4 might still be burned, on a CH4 burner. Throughout, fundamental understanding is enhanced through two dimensionless groups: laminar flame thickness normalised by burner diameter, δk/D, and the dimensionless flow number, U∗. These suggest an optimal role for H2 combustion, utilizing its high acoustic and blow-off velocities, in high intensity, subsonic, combustors, at low δk/D, and high U∗.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | ©2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. This is an author produced version of an article published in International Journal of Hydrogen Energy. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Conversion; Hob-burners; Blow-off; Lifted flames; Thermal power; Burner flames |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Thermofluids, Surfaces & Interfaces (iETSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 23 Apr 2021 14:51 |
Last Modified: | 19 Jan 2023 16:43 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ijhydene.2021.02.144 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:173134 |