The invention relates to a catalyst and a process for the autothermal,
catalytic steam reforming of hydrocarbons using the catalyst. The
catalyst has a multilayer structure and comprises a lower catalyst layer
located directly on a support body and an upper catalyst layer located on
the lower catalyst layer, with the lower catalyst layer preferentially
catalysing the partial oxidation and the upper catalyst layer
preferentially catalysing steam reforming. In a further embodiment, a
three-layer catalyst having a further catalyst layer for the carbon
monoxide conversion (water gas shift reaction) is described. Each
catalyst layer comprises at least one platinum group metal on an oxidic
support material.The steam reforming process is carried out in an
adiabatic process by passing a feed mixture of hydrocarbons, oxygen and
water or water vapour which has been heated to a preheating temperature
over the multilayer catalyst.Catalyst and process are used for producing
hydrogen-containing fuel gases in reformer systems, preferably for fuel
cells.