Their study focuses on the three-step combustion of methane, the primary component of natural gas. Methane is also a potent greenhouse gas, and understanding how it burns more completely is important both for industrial safety and for reducing harmful emissions.

Lebelo and Zuva modelled a rectangular block of reactive material – think of a fuel stockpile – and tracked how heat builds up and escapes during combustion. Heat leaves the system in two ways: convection, where surrounding air carries warmth away, and radiation, where energy is emitted as invisible electromagnetic waves, much like the heat you feel from a campfire without touching it.

Using advanced numerical methods, the pair found that certain factors accelerate the burning process and cause temperatures to rise significantly. The reaction rate, the chemistry involved, and the intensity of each combustion step all push temperatures higher – potentially to dangerous levels if left unchecked.

On the other hand, Lebelo and Zuva identified factors that act as natural brakes. Higher radiation levels, greater activation energy, and stronger convective cooling all slow the reaction down, reducing heat release and carbon dioxide emissions in the process – a finding with genuine implications for climate-conscious engineering.

Critically, the study also identifies safe operating thresholds: values of a key parameter, known as the Frank–Kamenetskii parameter, that must not be exceeded to prevent thermal runaway and explosion.

For Lebelo and Zuva, the goal is simple: use mathematics to make combustion safer, cleaner, and better understood – one equation at a time.