NOVELTY - A hydrogen production system (100) comprises a heat exchanger (110) where air is heated up by molten salts or other fluids as hot helium, a feed hydrodesulfuration section (170), at least two post-combustion chambers (120), membrane reforming (130) based on three steps reaction/membrane hydrogen separation, a retentate recirculator, carbon dioxide separation section (150), hydrogen cooler and compressor, and a final purification with pressure swing absorber (190).    USE - As hydrogen production system (claimed). The hydrogen is used in refinery application to convert sulfur into hydrogen sulfide, to reduce aromatics content and to crack heavier compounds into lighter ones.    ADVANTAGE - The system has increase energy efficiency for producing hydrogen via membrane reforming and provides the way to produce large amount of hydrogen with the minimum environmental impact.    DETAILED DESCRIPTION - A hydrogen production system (100) comprises a heat exchanger (110) where air is heated up by molten salts or other fluids as hot helium, a feed hydrodesulfuration section (170), at least two post-combustion chambers (120), membrane reforming (130) based on three steps reaction/membrane hydrogen separation, a retentate recirculator, carbon dioxide separation section (150), hydrogen cooler and compressor, and a final purification with pressure swing absorber (190). The heat of reaction is not provide by the combustion of the hydrocarbons, but is supplied from a separated unit, nuclear reactor or solar heated molten salts. The hydrogen partial pressure in the separation module is reduced by sweeping gas as steam or nitrogen. Each reforming step is made by physically separated reforming reactor and separation module. The separation modules are realized either by a bundle of tubular membranes or laminar ones. Each tubular or planar membrane is a multilayer structure made of a ceramic or metallic (porous stainless steel) substrate and a metallic Pd-alloy hydrogen selective layer. The catalyst used inside the convective reformer tubes is made of porous foam metallic structure to improve the inside tubes heat transfer coefficient. The carbon dioxide separation section consists of a condensate separator and adsorption columns for the carbon dioxide capture and store.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a system.    Hydrogen production system (100)    Heat exchanger (110)    Post-combustion chambers (120)    Membrane reforming (130)    Carbon dioxide separation section (150)    Feed hydrodesulfuration section (170)    Pressure swing absorber (190)