NOVELTY - Producing a hydrogen product stream involves combining steam stream and a hydrocarbon containing stream to produce a reactant stream and reacting hydrocarbons with steam to produce an intermediate product stream (88); forming the hydrocarbon stream without changing flow rate of the steam stream and while maintaining reformer exit temperatures at both the reactant; utilizing a synthesis gas stream (10) formed by a gasifier; subjecting the intermediate product stream to a water gas shift reaction; and separating the hydrogen to produce the hydrogen product stream (102).    USE - For producing hydrogen product stream (claimed).    ADVANTAGE - The method does not uses the same amount of natural gas or synthetic natural gas or refinery off-gas in the production of the hydrogen; provides simplified and less expensive gasification train within the gasification facility; and produces hydrogen with lower cost.    DETAILED DESCRIPTION - Producing a hydrogen product stream involves combining steam stream and a hydrocarbon containing stream to produce a reactant stream and reacting hydrocarbons with steam contained in the reactant stream in a steam methane reformer to produce an intermediate product stream (88); forming the hydrocarbon stream from a first and second feed stream without changing flow rate of the steam stream and while maintaining reformer exit temperatures at both the reactant and flue gas side essentially constant and flow rate of the flue gas essentially constant, where the first feed stream is made up of at least one of natural gas, refinery off-gas, naphtha and synthetic natural gas, and the second feed stream is made up of a hydrogen and carbon monoxide containing gas and at least one of the natural gas, the refinery off-gas, naphtha and synthetic natural gas; utilizing a synthesis gas stream (10) formed by a gasifier in connection with production of the hydrogen and carbon monoxide containing gas; subjecting the intermediate product stream to a water gas shift reaction to produce a shifted stream (98); and separating the hydrogen from the shifted stream in a pressure swing adsorption unit to produce the hydrogen product stream (102).    DESCRIPTION OF DRAWING(S) - The figure shows view of apparatus for producing hydrogen product stream.    Synthesis gas stream (10)    Intermediate product stream (88)    Pressure swing adsorption unit (100)    Hydrogen product stream (102)    Superheated steam stream (144)