Methanation catalyst for removing trace amounts of oxycarbide

Abstract

The invention discloses a methanation catalyst of carbon oxides containing nickel, the methanation catalyst contains active components of a) nickel oxide, b) tungsten oxide and / or molybdenum oxide, and c) at least one active component which is selected from alkali metal oxides, alkaline earth metal oxides and rare earth metal oxides which are loaded on a carrier of the oxides, and the carrier of the oxides is aluminium oxide, silicon oxide, titanium oxide, zirconium oxide or the mixture thereof. The catalyst of the invention has very high activity at low temperature, high anti-poisoning capacity and thermal stability and broad application prospect.

Description

technical field

[0001] The present invention relates to a kind of methanation catalyst and its preparation method and application, specifically, relate to a kind of carbon oxide (comprising CO, CO 2 ) Catalyst for methanation reaction, preparation method and application thereof. Background technique

[0002] Domestically used methanation catalysts are mainly used in ethylene plants and ammonia plants. Specifically, in the ethylene plant, the methanation reaction unit is before the carbon 2 and carbon 3 hydrogenation units, and provides hydrogenation hydrogen sources that meet the process requirements for the latter two reaction units; while in the ammonia synthesis unit, the methanation unit is also The last step in the entire feed gas purification process. The methanation reaction of carbon oxides, that is, the carbon oxides in a hydrogen-rich process gas (such as less than 0.4%) are hydrogenated to CH 4 and H 2 The O form is removed. The role of the methanation cataly...

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