Carried chromium-free high-temp. transformation catalyst and preparing process thereof

Abstract

A carried non-chromium catalyst for high-temp conversion is characterized by that its active components are gamma-Fe2O3, K2O and MO chosen from CoO, NiO, V2O5 and their mixture and its carrier is activated carbon or Mg-Al spinel. Its preparing process includes activating surface of the carrier, vacuum impregnating at least twice, and precipitating if the activated carbon is used as carrier, or preparing gamma-Fe2O3 sol, impregnating, and mixing the M, K and Mg salts with the carrier carrying Fe sol if the Mg-Al spinel is used as carrier. Its advantages are environment protection, low consumption and wide temp range (275-600 deg.C).

Description

technical field

[0001] The invention relates to a loaded CO high-temperature shift catalyst (abbreviated as a high-temperature shift catalyst), in particular to a catalyst with activated carbon or magnesium-aluminum spinel as a carrier, mainly loaded with iron oxide on its surface, and other non-chromium metal oxides Highly variable catalyst for additives. The metal oxides such as cobalt oxide CoO, nickel oxide NiO, vanadium oxide V 2 o 5 , together with oxides such as potassium and magnesium, form a semi-water gas shift process that can be applied to the ammonia synthesis system, and convert CO in the semi-water gas into CO with the participation of water vapor 2 and H 2 , A shift catalyst for the purpose of removing CO. Background technique

[0002] It has been more than 80 years since the development of high shift catalysts for the CO shift process in the semi-water gas of the ammonia synthesis system. The iron-chromium high-stable catalyst ...