NOVELTY - Production of hydrogen containing carbon mono- and dioxide at concentrations below minimum level, includes receiving a reforming feedstock, delivering it to a reforming catalyst bed, passing the reforming product stream to a hydrogen purification module, and passing it through a polishing catalyst bed.    USE - For production of purified hydrogen.    ADVANTAGE - The process produces purified hydrogen with no additional elements contributing to a loss in fuel cell efficiency.    DETAILED DESCRIPTION - Production of hydrogen containing concentrations of CO and CO2 below defined minimum level, comprises:    (a) receiving a reforming feedstock comprising steam and at least an alcohol vapor and a hydrocarbon vapor;    (b) delivering the reforming feedstock to a reforming catalyst bed to produce a reforming product stream comprising hydrogen, CO and CO2;    (c) passing the product stream to a hydrogen purification module containing a hydrogen-selective membrane to produce permeate and byproduct streams; and    (d) passing the product stream through a polishing catalyst bed containing methanation catalyst to convert a portion of CO and CO2 in the permeate stream into methane, thus yielding a product stream comprising hydrogen, methane and CO and CO2 below defined minimum level.    An INDEPENDENT CLAIM is also included for a steam reformer (512) comprising:    (i) a shell having an outer surface and a heated reforming region to receive a reforming feedstock;    (ii) a reforming region (562) including a reforming catalyst bed (552) to receive the feedstock and convert it into a reforming product stream comprising hydrogen, carbon monoxide and carbon dioxide;    (iii) a hydrogen purification module (554) including a hydrogen-selective membrane in fluid communication with the reforming catalyst bed to produce permeate and byproduct streams (505) comprising a portion of the reforming product stream which passes and does not pass through the membrane, respectively; and    (iv) a polishing catalyst bed (556) including methanation catalyst where the catalyst bed is in fluid communication with the module and adapted to receive the permeate stream and reduce the concentration of carbon dioxide (CO2) and carbon monoxide (CO) to below defined minimum concentrations by catalytic reaction to produce methane, thus yielding a product stream (503) comprising hydrogen and methane and CO2 and CO at concentrations below minimum.    DESCRIPTION OF DRAWING(S) - The figure shows a steam reformer with internal hydrogen purification using plate membrane elements.    Product stream (503)    Byproduct stream (505)    Reformer (512)    Reforming catalyst tube (552)    Plate membrane module (554)    Polishing catalyst tube (556)    Reformation region (562)