Catalyst for steam reforming containing nickel, magnesium and aluminium, process for producing the catalyst, and process for producing hydrogen using the catalyst

摘要

A catalyst for steam reforming, comprises porous oxide particles containing magnesium and aluminum and fine metallic nickel particles which are present in the vicinity of surface of the porous oxide particles and which have an average particle diameter of from 1 to 10 nm, said catalyst having a nickel content of from 0.15 to 12% by weight based on the weight of the catalyst and a molar ratio of nickel to a sum of magnesium, nickel and aluminum of from 0.001:1 to 0.12:1 in which the molar ratio of magnesium to aluminum (Mg:Al) is 4:1 to 1.5:1. The catalyst for decomposition of hydrocarbons is capable of maintaining a particle size of metallic nickel particles of not more than 10 nm at considerably reduced nickel content, and exhibits an excellent anti-coking property even under a low steam atmosphere.