HYDROGEN GAS PRODUCING METHOD

摘要

Disclosed is a method for producing hydrogen gas, comprising the steps of granulating zeolite, applying water to the zeolite at a temperature of 300 t o 500.degree.C, and conducting direct pyrolysis of water using the zeolite as a catalyst, wherei n alkali metal halide and/or alkaline-earth metal halide is/are added to the zeolite at the time of granulating.