NOVELTY - The process comprises maintaining an effluent temperature obtained from a reforming reactor by co-current heat exchange, in a co-current heat exchanger, between the effluent obtained from the reforming reactor and the hydrocarbon feedstock to be reformed, and purifying reformate obtained from the cocurrent heat exchanger in a purification section for generating a hydrogen gas. A first water stream is directed to the co-current heat exchanger for its vaporization by recovering a part of the enthalpy of synthesis gas produced for controlling the temperature of the feed stream.    USE - The process for producing heat integrated hydrogen by autothermal reforming a hydrocarbon feedstock such as liquid, ethanol and natural gas in a reforming reactor, where the hydrogen is useful as a fuel for burner (all claimed).    ADVANTAGE - The process ensures simple, safe, efficient, economical and large scale production of heat integrated hydrogen with high purity (99%) and reduced greenhouse gas emission rate.    DETAILED DESCRIPTION - The process comprises maintaining an effluent temperature obtained from a reforming reactor by co-current heat exchange, in a co-current heat exchanger, between the effluent obtained from the reforming reactor and the hydrocarbon feedstock to be reformed, and purifying reformate obtained from the cocurrent heat exchanger in a purification section for generating a hydrogen gas. A first water stream is directed to the co-current heat exchanger for its vaporization by recovering a part of the enthalpy of synthesis gas produced for controlling the temperature of the feed stream. A second water stream is directed towards a heat exchanger downstream of the reactor for conversion reaction of carbon monoxide for recycling the exothermicity of the conversion reaction of carbon monoxide. A third water stream is directed towards a heat exchanger for recovering the heat obtained from combustion fumes by lowering the maximum outlet temperature of the fume. The effluent temperature after passing through the co-current heat exchanger is 250-400 degrees C. A part of the purification is carried out with a conversion reaction of the carbon monoxide. The first water stream is present in direct contact with a stream of the feedstock upstream of the exchanger when the feedstock is liquid. The first stream of evaporated water is present in contact with the stream of the feedstock in downstream of the cocurrent exchanger and upstream of the reforming reactor when the feedstock is gaseous. The water contained in the hydrogen-rich gas obtained from the reforming reactor is eliminated by a condenser located in the purification section. The water collected in the condenser is recycled to the process. The water collected in the condenser is sent in the reforming reactor to be used as a reagent of the steam reforming reaction.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a hydrogen production process.    Ethanol circulation conduit (100)    Liquid feed conduit (101)    Water circulation conduit (200)    Air conduit (300)    Pump (1000)    Compressor. (1012)