Porous Media Combustion Technology

Porous media combustion involves the propagation and stabilisation of flame fronts within a solid matrix of interconnected pores. By embedding the combustion zone within materials such as ceramic foams, alumina pellets or silicon carbide, heat transfer to the solid phase is greatly enhanced, enabling lean fuel mixtures to burn at lower temperatures with reduced emissions of nitrogen oxides. The solid structure acts as a heat sink and preheater, stabilising the flame and suppressing instabilities that often plague conventional burners under ultralean conditions. This technology supports wide-ranging applications from compact micro-gas turbines to industrial waste-gas treatment, offering high thermal efficiency, rapid response to load changes and the capacity to recover waste heat. Recent advances focus on tailoring pore geometry, enhancing thermal conductivity and integrating catalytic coatings to promote complete oxidation, while exploring reverse-flow and regenerative designs for large-scale ventilation air methane abatement and syngas production from biogas. Such developments underscore porous media combustion as a versatile platform for decarbonisation, energy recovery and the transition to hydrogen-rich fuel blends.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Porous Media Combustion Technology publication trend

The graph below shows the total number of articles in porous media combustion technology across all publications each year (not limited to Nature Index journals).

Technical terms

Porous medium combustion: The process of burning a fuel-air mixture within a solid matrix of interconnected pores that enhances heat transfer and flame stability.

Equivalence ratio: The ratio of the actual fuel-to-oxidiser ratio to the stoichiometric ratio, indicating fuel richness or leanness of the mixture.

Inert porous medium: A non-catalytic solid matrix, such as alumina or silicon carbide, used to stabilise and preheat combustion without chemical promotion.

Catalytic porous medium: A porous matrix coated with catalytic materials (e.g. platinum) that lower activation energy for oxidation, improving combustion efficiency.

Syngas: A mixture of hydrogen and carbon monoxide produced by partial oxidation or reforming of carbon-containing fuels, used as a versatile synthetic fuel or chemical feedstock.

References

1. Unsteady ultra-lean combustion of methane and biogas in a porous burner – An experimental study. Applied Thermal Engineering (2021).
2. Two-Dimensional Numerical Study of Methane-Air Combustion Within Catalytic and Non-catalytic Porous Medium. Frontiers in Chemistry (2020).
3. Syngas Production From the Reforming of Typical Biogas Compositions in an Inert Porous Media Reactor. Frontiers in Chemistry (2020).
4. Industrial-Scale Experimental Study on the Thermal Oxidation of Ventilation Air Methane and the Heat Recovery in a Multibed Thermal Flow-Reversal Reactor. Energies (2018).