The Effect of Hydrogen Ratio on Flame Temperatures in the Methane Combustion Reaction in the Burner

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Abstract
Nowadays, with the increasing energy demand and concerns about environmental sustainability, hydrogen is regarded as a crucial energy carrier in reducing dependence on conventional fuels. Hydrogen plays a critical role in various fields, particularly in fuel cells. Therefore, due to the undesirable effects of pure hydrogen usage on temperature and emissions, as well as the challenges and high costs of storage, efforts are being made to blend it with conventional fuels in varying proportions to achieve optimal combustion conditions. The aim of this study is to investigate the effects of adding hydrogen gas at different concentrations, without pre-mixing, to the methane combustion reaction inside the burner on flame characteristics. The combustion reaction of CH4 was carried out with six different H₂ concentrations (0%, 5%, 10%, 15%, 20%, 25%), and it was observed that as the H2 ratio increased, the flame temperature rose and its shape became more stable. The maximum flame temperature was recorded as 2732.248 K with 15% H₂. At 25% H2, the mixture exhibited behavior similar to that of a rich combustion mixture. The burner used in this study provides an alternative solution in the field of hydrogen burners.

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