Apparatus for hydrogen production and process using the apparatus

Device for producing hydrogen comprises a reformer for converting an educt gas, a catalyst stage , and a heat exchanger. The heat exchanger is connected to a water feeding unit which is placed under high pressure to guarantee a liquid aggregate state of the water in the stationary operation within and at the outlet of the heat exchanger on the reformer side. Device for producing hydrogen comprises a reformer (1) for converting an educt gas, e.g. hydrocarbon gas and water vapor, into hydrogen gas and further reformer products such as a product gas containing carbon dioxide and carbon monoxide, a catalyst stage (2) for reducing the amount of carbon monoxide in the product gas, and a heat exchanger (3) arranged between the reformer and the catalyst stage. The heat exchanger is connected to a water feeding unit (5) which is placed under high pressure to guarantee a liquid aggregate state of the water in the stationary operation within and at the outlet of the heat exchanger on the reformer side. A unit for relieving pressure to vaporize the water is arranged between the heat exchanger and the educt inlet (4) in the reformer. An Independent claim is also included for a process for producing hydrogen.