Assessment of the combustion of biogas in a turbulent diffusion flame

Abstract

This study aims to conduct a comprehensive assessment of biogas combustion within the context of a turbulent diffusion flame, with the goal of deepening the scientific understanding of the physical and chemical mechanisms governing this type of combustion and improving its efficiency in energy applications. The focus of the study is on the combustion of a binary mixture composed of methane and hydrogen, with an investigation into how different mixing ratios affect flame behavior, stability, and energy conversion efficiency. The study includes a detailed analysis of the flame's dynamic and thermal properties, examining temperature distribution, flow patterns, and mixing characteristics between the fuel and oxidizer under strong turbulence conditions. The obtained results were compared to experimental data, showing a highly positive correlation. The stability of the flame was also evaluated under the influence of different hydrogen ratios (30% and 40%), given hydrogen's crucial role in enhancing flame speed and increasing temperature. Environmental performance indicators were also considered by monitoring pollutant emissions from combustion, particularly nitrogen oxides (NOx), with the aim of proposing clean and environmentally friendly combustion solutions. This study can serve as a foundation for advanced mathematical and numerical models to simulate the complex reactions occurring within turbulent flames, enabling a precise analysis of chemical reactions and flow fields.