NOVELTY - Production (200) of hydrogen (227) comprises introducing feedstream (202) comprising bio-based feedstock (201) and water (229) into reformer (210) and supplying heat to reformer; contacting the feedstream with a steam reforming catalyst disposed within the reformer to form a reformate (212) comprising hydrogen and carbon monoxide; recovering the reformate from the reformer; contacting the reformate with steam in the presence of a water-gas shift catalyst disposed within a water-gas shift reaction zone; and heating the feedstream by heat exchange contact of the feedstream with a product stream.    USE - Production of hydrogen (claimed) used e.g. in petrochemical processes or for fuel cells or fuel cell vehicles.    ADVANTAGE - The process utilizes bio-based feedstocks to decrease fuel costs (e.g. the cost of producing the feedstock), minimize impacts to the environment (both in the production of feedstock and its use), and provide sustainable feedstocks for hydrogen production. It achieves conversion rate that is greater than that of traditional processes (e.g. processes utilizing conventional steam reforming catalysts to convert ethanol to hydrogen at high temperatures). The process results in hydrogen yield of greater than or equal to 60, preferably greater than or equal to 90%; and exhibits efficiency of greater than or equal to 70, preferably greater than or equal to 90%. The CO2 produced by the formation of hydrogen may be utilized for high pressure injection into applications, such as oil recovery, where such applications enhance the oil and gas recovery process, while at the same time minimize the carbon impact on the environment (the carbon monoxide/dioxide is turned into a non-volatile component within the earth). When external heat exchange fluids are utilized within a portion of the process, the heat exchangers utilizing the external heat exchange fluids will be smaller and require less power than those of conventional processes employing solely externally supplied heat exchange fluids due to the reduced temperature difference between the externally supplied heat exchange fluid and the process stream requiring heat exchange. Compression (e.g. pressurizing the feedstock within a compressor) is eliminated in the process, since the heat exchange contact of the feedstock with the product stream(s) is sufficient to pressurize the feedstock before introduction into the reformer. The process is capable of producing pure hydrogen with a single pass, requiring a smaller footprint. It may be utilized in small scale hydrogen production processes, e.g. producing less than 3 tons hydrogen/day, or preferably less than 1500 kg hydrogen/day. The process may be utilized in central and semi-central production processes and is suitable in forecourt scale applications (e.g. the process may be disposed at or in proximity to the point of dispensing to the consumer, such as at forecourt stations for fuel cell vehicles). It results in optimal process efficiency and lower ethanol consumption per unit of hydrogen produced compared to conventional steam reforming processes utilizing primarily external heat exchange fluids. Overall external fuel consumption by the process is reduced compared to conventional processes.    DETAILED DESCRIPTION - Production (200) of hydrogen (227) comprises introducing a feedstream (202) comprising bio-based feedstock (201) and water (229) into a reformer (210) and supplying heat to the reformer from a heat source (230) to maintain the reformer at a reformer operation temperature; contacting the feedstream with a steam reforming catalyst disposed within the reformer to form a reformate (212) comprising hydrogen and carbon monoxide; recovering the reformate from the reformer; contacting the reformate with steam in the presence of a water-gas shift catalyst disposed within a water-gas shift reaction zone to form a water-gas shift product stream (216) comprising hydrogen, where water-gas shift reactor (214) operates at a water-gas shift operation temperature that is lower than the reformer operation temperature, and the water-gas shift product stream comprises hydrogen in a greater quantity than in the reformate; and heating the feedstream by heat exchange contact of the feedstream with a product stream selected from the reformate and/or water-gas shift product stream to transfer heat from the product stream to the feedstream before introducing the feedstream into the reformer.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic view illustrating hydrogen production process.    Production of hydrogen (200)    Bio-based feedstock (201)    Feedstream (202)    Reformer (210)    Reformate (212)    Water-gas shift reactor (214)    Water-gas shift product stream (216)    Hydrogen (227)    Water (229)    Heat source (230)