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Bimetal methanation catalyst and preparation method thereof

A methanation catalyst and bimetallic technology, applied in the field of bimetallic methanation catalyst and its preparation, can solve the problem of removing hydrogen-rich gas, etc., and achieve the effect of high and low temperature methanation activity and easy reduction

Inactive Publication Date: 2012-05-23
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, nickel-iron bimetallic catalysts have not been used as low-temperature methanation catalysts in the range of 220 °C to 250 °C to completely remove trace CO impurities in hydrogen-rich gases.

Method used

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  • Bimetal methanation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 100g of alumina carrier and treat it at 150°C and 13.3Pa pressure for 10min, then cool it down to room temperature for later use; weigh 49.4g of nickel nitrate hexahydrate and 72.4g of iron nitrate nonahydrate, and prepare 200mL of mixed salt solution; take 200mL of prepared The mixed salt solution was impregnated into 100g of the treated carrier, and stood at room temperature for 2h; then filtered off the excess solution, dried at 120°C for 6h, and was heated to 450°C for 5h to decompose the salt. 2 Reduction treatment was carried out at 400° C. for 10 h in a stream, and after cooling down to room temperature, it was passivated by oxygen to obtain catalyst 1.

Embodiment 2

[0028] Take 100g of alumina carrier and treat it at 150°C and 13.3Pa pressure for 10min, then cool it down to room temperature for later use; weigh 24.7g of nickel nitrate hexahydrate, 21.2g of nickel acetate tetrahydrate, 36.2g of ferric nitrate nonahydrate, 22.1g of acetic acid tetrahydrate Iron, prepared into 200mL mixed nickel salt solution; take 200mL of the prepared mixed nickel salt solution and impregnate it into 100g of the treated carrier, let stand at room temperature for 2h; filter off excess solution, dry at 120°C for 6h, heat up to 450°C for roasting 5h to decompose the salt, then in H 2 Reduction treatment was carried out at 400° C. for 10 h in a stream, and after cooling down to room temperature, the catalyst 2 was passivated by oxygen.

Embodiment 3

[0030] Take 100g of alumina carrier and treat it at 150°C and 13.3Pa pressure for 10min, then cool it down to room temperature for later use; weigh 69.4g of nickel nitrate hexahydrate and 43.4g of iron nitrate nonahydrate, and prepare 200mL of mixed nickel salt solution; take 200mL of prepared Immerse the good mixed nickel salt solution into 100g of the treated carrier, and let it stand at room temperature for 2h; then filter off the excess solution, dry at 120°C for 6h, heat up to 450°C and roast for 5h to decompose the salt, and then in 50% H 2 / 50%N 2 Reduction treatment was carried out at 400° C. for 10 h in the stream, and after cooling down to room temperature, the catalyst 3 was passivated by oxygen.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/83B01J37/02C01B3/58
Inventor 赵永祥王宁王永钊高晓庆武瑞芳
Owner SHANXI UNIV
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