Davies, Tomas, Pugh, Daniel  ORCID: https://orcid.org/0000-0002-6721-2265, Hewlett, Sally, Morris, Steven and Bowen, Philip ORCID: https://orcid.org/0000-0002-3644-6878
2026.
Influence of emissions normalisation methods on H2–CH4 fuel comparisons in generic and NOx-Abated gas turbine combustion.
International Journal of Hydrogen Energy
223
, 154402.
10.1016/j.ijhydene.2026.154402
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Abstract
Parametric experiments were performed using CH4–H2 blends to fuel a model gas turbine combustor at elevated inlet conditions, unabated and whilst employing exhaust gas recirculation (EGR) as a NOx-abatement technique. The purpose was to quantify the performance of conventional dry, 15% O2 NOx correction (ISO) against mass by heat input (MBHI) normalisation to experimentally verify simulated work from the literature, while expanding on this work to cover NOx-abated combustion. NOx was found to be consistently inflated in H2 combustion when compared to CH4 by the ISO method, whereas the MBHI method was found to closely approximate the mass by work output baseline emissions. Multipliers proposed to correct this inflation were shown to be impractical. A fundamental problem in assessing the effectiveness of EGR using the ISO method was identified as it does not account for the additional volumetric dilution introduced, whereas the MBHI normalisation method avoids this issue.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Engineering |
| Additional Information: | RRS policy applied |
| Publisher: | Elsevier |
| ISSN: | 0360-3199 |
| Date of First Compliant Deposit: | 12 March 2026 |
| Date of Acceptance: | 4 March 2026 |
| Last Modified: | 12 Mar 2026 10:00 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/185657 |
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