Process and apparatus for production of hydrogen using the water gas shift reaction

摘要

A process and a reactor vessel for production of hydrogen via the water gas shift reaction at CO/CO 2 ratios above 1.9, and steam to gas rations below 0.5, are disclosed, The process includes first reacting a feed gas mixture of carbon monoxide and steam in the presence of a precious metal catalyst on a structural support, yielding a resultant gas, and then reacting the resultant gas in the presence of a non-precious metal catalyst on a support medium. The reactor vessel includes a chamber having an inlet duct and an outlet. A structural support having the precious metal catalyst is positioned upstream of the non-precious metal catalyst positioned within the chamber. The structural support may be positioned within the inlet duct or within the chamber. The support medium may be a granular medium or a structural support.