Process for the production of high-purity hydrogen gas with a membrane reactor and a pretreatment step

摘要

The invention relates to a method for producing high-purity hydrogen gas with a membrane reactor from a hydrocarbon stream and water vapor, including a hydrogenating pretreatment of the hydrocarbon stream according to German patent application 10040539.8. DOLLAR A The object of the invention is to use in the pretreatment step of the process according to the main patent a hydrocarbon mixture which can be largely converted to n-paraffins on a catalyst with the addition of hydrogen. The heat of reaction generated by the hydrogenation is such that a pre-defined target temperature of the emerging product stream is reached under adiabatic conditions. DOLLAR A The object was achieved by a process for the production of high-purity hydrogen gas with a membrane reactor from a hydrocarbon stream and water vapor by means of steam reforming in accordance with the main patent, and a pretreatment step for the hydrogenating treatment of the hydrocarbon stream, which consists of a hydrocarbon mixture, with the simultaneous generation of n-paraffins , wherein the hydrocarbon mixture contains a proportion of hydrogenatable hydrocarbons such that the hydrogenation heat generated in the pretreatment step is sufficient to allow the pretreatment step to take place and to bring the hydrocarbon stream leaving the pretreatment to the desired target temperature.