A burner apparatus for burning a gas and air mixture may include a burner wall. The burner wall may have a plurality of ridges and a plurality of grooves. Each groove may be defined between adjacent ridges. Each groove may also include a pair of slopes. Each slope may have an area of permeability having openings defined therein from which flames can project. Each ridge may define an area of reduced permeability relative to the areas of permeability of the slopes.

A gas cavity burner, wherein the present invention discloses a burner applied to ovens, more specifically, the present invention discloses a tubular burner composed by two half-shells disposed superposed conforming an inner mixture and diffusion chamber the receives a comburent and a combustible in order to generate a pilot and primary flames, said two half-shells comprising substantially symmetrical perimetral surfaces wherein one said shell comprises a corrugated perimeter surface while the other comprises a flat perimeter surface, the burner of the present invention also presenting a spacer between both half-shells, in that said spacer reduces deformation issues caused by the heating, while it also brings more control to the pilot flame and aggregates a reduction of material thickness in the manufacturing of the burner.

A gas burner 10 intended to point downwardly in use. The gas burner comprises a flame strip 24 in the form of a sheet material with a plurality of openings 38 therein to define ports for combustion gas. The outer side of the flame strip 24 provides a combustion surface in use. The gas burner also comprises a body member 22 with an inlet 18 thereinto for combustion gas. The body member 22 and flame strip 24 together define a combustion chamber 50, with a space between the flame strip 24 and an outer wall 32 of the body member. The body member 22 and/or flame strip 24 are profiled such that said space varies across the chamber 50 to provide a required flow of combustion gas across the chamber 50.

A process of partial oxidation is performed in a reactor which includes a reaction chamber and a burner assembly, wherein: the burner assembly has a single oxidant nozzle located within an fuel channel, said oxidant nozzle comprises a nozzle pipe and a nozzle outlet, the nozzle pipe and the fuel channel are arranged to produce a diffusion flame, the nozzle outlet has a shape with two or more elongate lobes projecting from a center of the nozzle pipe.