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This study aims to evaluate a modeling approach for converting natural gas-fired industrial furnaces to hydrogen oxy-fuel combustion.

Numerically efficient CFD modeling for the stepwise conversion of a natural gas-air fired industrial reheating furnace to low-NOx hydrogen oxy–fuel combustion

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This study aims to evaluate a modeling approach for converting natural gas-fired industrial furnaces to hydrogen oxy-fuel combustion.
Utilized RANS simulations and Reactor Network Model for detailed chemistry.
Validated against experimental data from a semi-industrial furnace with low-NOx and natural gas burners.
Applied the validated model to a 15 MW industrial reheating furnace for partial hydrogen substitution.
Fuel consumption reduced by up to 3.8% and CO2 emissions by up to 21%.
NOx emissions decreased by a maximum of 34% with additional hydrogen burners.
Process efficiency improved from 71.5% to 74.1% without significant changes to temperature fields or heat transfer.

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Randomized trial assesses fuel consumption and emissions in an industrial furnace, suggesting hydrogen integration improves efficiency.

Kislinger et al. (2026) studied this question.

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