Process and reactor system for preparing hydrogen/and or carbon monoxide by catalytic steam reforming of a hydrocarbon

摘要

Described is a process for the preparation of hydrogen and/or carbon monoxide rich gas by catalytic steam reforming of a hydrocarbon feedstock. A first stream of the feedstock is autothermally steam reformed in parallel with a second stream of the feedstock being steam reformed in the presence of a steam reforming catalyst in heat conducting relationship with hot effluent from the autothermal steam reforming and with steam reformed hot effluent withdrawn from steam reforming catalyst. The effluent from the autothermal steam reforming step and the heat exchange steam reforming step are combined after having supplied heat to steam reforming reactions proceeding in the second stream of the feedstock.