| 摘要 |
A catalytic fuel oxidation unit includes a capillary flow path where liquid fuel is transported, preferably under no external pressure. At the end of the capillary section, the fuel is evaporated. Vaporized fuel is mixed (3) with air. A gas-permeable catalyst (4) surrounds the mixing zone where pre-mixed fuel and air are oxidized with atmospheric oxygen. A thermal conductor (6), preferably metal, supplies heat back to the capillary section, to cause vaporization of the liquid fuel. An Independent claim is included for the catalytic oxidation of fuel. Energy for vaporization of the fuel is supplied to it through the material forming the capillaries. Preferred Features: Two nested tubes (1, 2) form an annular zone, with a catalyst (4) including a mixing zone (3) at one end. The tubes project into the mixing zone. The catalyst includes a heat transfer unit (6) with built-in thermally-conductive material. The catalyst is surrounded by thermally-conductive material. In the annular gap, fluid-permeable material is included, especially mineral, glass or metal wadding. The catalyst is for oxidation, and is preferably made of ceramic foam, especially with three-dimensionally cross-linked pores. A water supply is provided, if appropriate via one or more annular gaps. Heat produced by oxidation in the catalyst is transferred into the annular gap, by thermally-conductive material, preferably metal, and is used to evaporate the fuel. Water is supplied in addition, so that the burner can be operated as a reformer. The temperature at which fuel emerges from the flow path with capillary effect, lies below the self-ignition temperature of the fuel.
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