Bimetal methanation catalyst and preparation method thereof

Abstract

The invention discloses a bimetal methanation catalyst for the removal of micro carbon monoxide from a hydrogen-rich gas and a preparation method thereof. The bimetal methanation catalyst contains active components, namely nickel oxide and ferric oxide, loaded on an oxide carrier and an assistant, wherein the assistant is at least one element selected from the main group I, the main group II, thesubgroup I, the subgroup III, the subgroup VI and the subgroup VIII of the periodic table, and the oxide carrier is alumina, titanium dioxide, zirconium dioxide and silicon dioxide or a mixture thereof. The catalyst of the invention can allow the micro carbon monoxide to be removed from the hydrogen-rich gas at a relatively low temperature and has the advantages of low load, high activity, relatively low cost and wide application prospect.

Description

technical field

[0001] The invention relates to a methanation catalyst, in particular to a bimetallic methanation catalyst and a preparation method thereof. The catalyst can remove trace carbon monoxide in hydrogen-rich gas at relatively low temperature. Background technique

[0002] Methanation catalysts are mainly used in ethylene units, ammonia synthesis units and hydrogen fuel cell units. The trace amount of carbon monoxide in the raw gas of these devices is deeply removed through methanation reaction, that is, the trace amount (such as 5000ppm, unit ppm means ×10 -6 (V / V)) of CO by hydrogenation to CH 4 and H 2 O is removed to prevent downstream catalyst poisoning.

[0003] In recent years, with the continuous development of conversion technology, the CO content in the feed gas has been continuously reduced to a lower level, and the methanation furnace has naturally lowered the temperature requirements of the reaction hot spots. Traditional high-temperature methanati...

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