Work

Influence of emissions normalisation methods on H2–CH4 fuel comparisons in generic and NOx-Abated gas turbine combustion

Year: 2026

Type: article

Abstract: Parametric experiments were performed using CH 4 –H 2 blends to fuel a model gas turbine combustor at elevated inlet conditions, unabated and whilst employing exhaust gas recirculation (EGR) as a NO x -abatement technique. The purpose was to quantify the performance of conventional dry, 15% O 2 NO x correction (ISO) against mass by heat input (MBHI) normalisation to experimentally verify simulated work from the literature, while expanding on this work to cover NO x -abated combustion. NO x was found to be consistently inflated in H 2 combustion when compared to CH 4 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.

Source: International Journal of Hydrogen Energy

DOI: 10.1016/j.ijhydene.2026.154402

Authors: Tomas Davies, Daniel Pugh, Sally Hewlett, Steven Morris, Philip Bowen

Institution: Cardiff University

Language: English

Topic: Combustion and flame dynamics

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

SDGs: Climate action, Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,730