An integrated steam reformer / combustor assembly for use in a fuel processing system that supplies a steam and fuel mixture to the reformer to produce a reformed product containing primarily hydrogen, the assembly comprising: a multitude of tubular sections where the inside of each tubular section is a combustor and contains a structured catalyst support made of FeCrAlY alloy sheets coated with a catalyst to induce the combustion reactions, a. at least two tube sheets supporting and spacing the multitude of tubular sections; b. a cylindrical wall enclosing the multitude of tubular sections which are connected to the tube sheets and having flow passages for feeding fuel to be reformed and removing the reforming products and containing a reforming catalyst, wherein said reforming catalyst is either in pellet form or in the form of FeCrAlY alloy sheets coated with a catalyst to induce reforming reactions; c. a first reactor head connected to one tube sheet and having a flow passage for feeding fuel to be combusted; and d. a second reactor head connected to the other tube sheet and having a flow passage for removing the combustor products, wherein the FeCrAlY alloy sheets of the combustion and reforming catalyst are coated with a catalytic film having a thickness of 5 to 1000 μm, wherein the FeCrAlY alloy sheets of the combustion catalyst are coated with an alumina film containing a dispersed metal phase of palladium or platinum metal, and mixtures thereof, and wherein the dispersed metal phase is between 0.1-10% of the alumina film. a multitude of tubular sections where the inside of each tubular section is a combustor and contains a structured catalyst support made of FeCrAlY alloy sheets coated with a catalyst to induce the combustion reactions, a. at least two tube sheets supporting and spacing the multitude of tubular sections; b. a cylindrical wall enclosing the multitude of tubular sections which are connected to the tube sheets and having flow passages for feeding fuel to be reformed and removing the reforming products and containing a reforming catalyst, wherein said reforming catalyst is either in pellet form or in the form of FeCrAlY alloy sheets coated with a catalyst to induce reforming reactions; c. a first reactor head connected to one tube sheet and having a flow passage for feeding fuel to be combusted; and d. a second reactor head connected to the other tube sheet and having a flow passage for removing the combustor products, a. at least two tube sheets supporting and spacing the multitude of tubular sections; b. a cylindrical wall enclosing the multitude of tubular sections which are connected to the tube sheets and having flow passages for feeding fuel to be reformed and removing the reforming products and containing a reforming catalyst, wherein said reforming catalyst is either in pellet form or in the form of FeCrAlY alloy sheets coated with a catalyst to induce reforming reactions; c. a first reactor head connected to one tube sheet and having a flow passage for feeding fuel to be combusted; and d. a second reactor head connected to the other tube sheet and having a flow passage for removing the combustor products, wherein the FeCrAlY alloy sheets of the combustion and reforming catalyst are coated with a catalytic film having a thickness of 5 to 1000 μm, wherein the FeCrAlY alloy sheets of the combustion catalyst are coated with an alumina film containing a dispersed metal phase of palladium or platinum metal, and mixtures thereof, and wherein the dispersed metal phase is between 0.1-10% of the alumina film.