NOVELTY - A methanation reactor for the removal of carbon monoxide from a reformate stream comprises a porous ceramic support defining a surface acidity; coating to increase the surface acidity; noble metal catalyst coupled to the support and/or coating; and flowpath to place the reformate stream in fluid communication with the noble metal catalyst such that carbon monoxide conversion in the reactor is greater than if the coating were not present.    USE - For the removal of carbon monoxide from a reformate stream.    ADVANTAGE - The methanation reactor can achieve selective methanation of carbon monoxide (CO) over carbon dioxide (and other competing species) without having to resort to approaches that require increases in weight, volume or complexity. It is compatible with other reformate stream CO reduction approaches.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a method of delivering fuel to fuel cell system, comprising configuring a fuel delivery system (100) to include a fuel supply (100A) and oxygen supply (100B); fluidly connecting a fuel processing system to the fuel delivery system, the fuel processing system comprising reformer (200) to evaporate a mixture of fuel and oxygen coming from the fuel delivery system, and methanation reactor (400); introducing fuel and oxygen to create a fuel-oxygen mixture; heating the fuel-oxygen mixture in the reformer such that the reformate stream is produced; purifying the reformate stream in the reactor; and transporting a hydrogen-rich portion of the reformate stream to the fuel cell (500); and    (2) a method of purifying a methanol reformate stream, comprising configuring a reformer to evaporate a mixture of fuel and oxygen, the evaporated mixture defining the reformate stream; fluidly connecting a methanation reactor to the reformer for the removal of carbon monoxide from the reformate stream; evaporating the mixture of fuel and oxygen such that the reformate stream is produced; and exposing portion(s) of the reformate stream to the reactor such that at least a portion of the carbon monoxide is removed from the reformate stream.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of a mobile fuel cell system, including a fuel processing subsystem.    Fuel delivery system (100)    Fuel supply (100A)    Oxygen supply (100B)    Reformer (200)    Methanation reactor (400)    Fuel cell (500)