Catalytic combustion burner made of porous material, with optimised operating performance and bottle equipped with such a burner

Catalytic combustion burner made of porous material, comprising:

• an end piece comprising:
• a lower part of outside diameter ϕ1 and delimiting a first cavity of diameter ϕ2, said first cavity extending along a main axis and being adapted to receive a wick that is capable of soaking the end piece with a combustible composition, and
• an upper part having a peripheral side wall comprising an inner face of essentially frustoconical shape and delimiting a second cavity of depth P, an outer face, an upper face of circular shape and a base, said inner face having a lower end of diameter ϕ3 greater than ϕ2 and an upper end of diameter ϕ4 greater than ϕ3, the upper end of said side wall communicating with the atmosphere and said lower end of said base communicating with said first cavity, the lower end of said inner face terminating with structure defining a counterbore of diameter ϕ3, communicating with said second cavity, the lower end of said inner face terminating with structure defining a counterbore of diameter ϕ3, communicating with said second cavity,
• at least a part of said outer face of said peripheral side wall is doped with a catalyst,
• a sleeve arranged in the extension of said lower part of the end piece and delimiting a third cavity extending said first cavity of said lower part, and
• an insert arranged in said second cavity of the end piece and having a surface in contact with said base of the end piece,
• wherein said porous material is obtained from a composition comprising, as a percentage of the total weight of said composition, between 0.5 and 1% of silicon carbide as a heat-conducting compound, between 30% and 70% of at least one refractory compound, between 2% and 30% of at least one binder, and between 5% and 40% of at least one pore-forming agent, and
• in that all of said circular-shaped upper face is doped with said catalyst.