This study focuses on modeling a combustion chamber using a perfectly stirred reactor (PSR) to explore the blowout stability criteria for methane-hydrogen fuel blends reacting in air. The PSR employs species and energy balance equations to analyze chemical species concentrations, heat transfer mechanisms, and energy distribution within the system at various inlet temperature of 300–600 K, pressure of 1–10 bar and an array of equivalence ratio 0.6 to 1.4. An in-house Python code is developed, validated, and utilized to investigate the effects of varying hydrogen percentages in the fuel and to study the blowout characteristics of reactor. Results reveal that increasing hydrogen content boosts the blowout stability limit while reducing pollutant emissions, highlighting the potential of hydrogen-enriched fuels to enhance combustion chamber stability and environmental sustainability. Key findings include identifying the optimal hydrogen percentage in the methane-hydrogen fuel blend for maximum blowout stability and analyzing the influence of equivalence ratio variations on blowout limits and pollutant formation. The study underscores the applications in designing more stable and efficient combustion chambers for gas turbines and internal combustion engines, with implications for reducing greenhouse gas emissions and improving fuel efficiency.