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Methanation catalyst, preparation method and application thereof

A methanation catalyst, a catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of no hydrogenation reaction, difficulty, etc., Achieve the effects of good low temperature methanation performance, high mechanical strength and low alkali consumption

Inactive Publication Date: 2015-09-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in CO, CO 2 At the same time, using traditional methanation catalysts, under normal reaction conditions CO 2 Hard to even non-hydrogenation reaction

Method used

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  • Methanation catalyst, preparation method and application thereof

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preparation example Construction

[0013] The invention provides a method for preparing a methanation catalyst, wherein the method comprises: contacting nickel aluminum alloy with alkali in water.

[0014] According to the method of the present invention, in order to further improve the mechanical strength and catalytic performance of the catalyst, it is more preferable that the nickel-aluminum alloy is an amorphous nickel-aluminum alloy.

[0015] According to the preparation method of the present invention, the optional range of the type of the base is wide, in order to further improve the mechanical strength and catalytic performance of the catalyst, preferably the base is an alkali metal hydroxide, more preferably sodium hydroxide and / or Or potassium hydroxide, more preferably sodium hydroxide.

[0016] According to the preparation method of the present invention, the form of the nickel-aluminum alloy can be selected in a wide range. In order to further improve the mechanical strength and catalytic performan...

Embodiment approach

[0022] According to a preferred embodiment of the present invention, the alkali is provided as an alkali solution, and the step of contacting the nickel aluminum alloy with the alkali in water includes:

[0023] The nickel aluminum alloy is mixed with deionized water, and then the alkali solution is added for the contacting.

[0024] According to the preparation method of the present invention, in order to further improve the mechanical strength and catalytic performance of the catalyst, the volume ratio of deionized water to the nickel-aluminum alloy is preferably 6-12:1, preferably 8-10:1.

[0025] According to the preparation method of the present invention, in order to further improve the mechanical strength and catalytic performance of the catalyst, the concentration of the alkali solution is preferably 10-50% by weight, preferably 20-50% by weight.

[0026] According to the preparation method of the present invention, in order to further improve the mechanical strength a...

Embodiment 1

[0040] Add 50 grams of nickel and 50 grams of aluminum into the quartz tube, heat it in a high-frequency furnace until it melts, and alloy it;

[0041] Use an inert gas to spray the alloy liquid from the nozzle under the quartz tube to the copper roller with a rotation speed of 1000 rpm. Cooling water is passed through the copper roller, and the alloy liquid is rapidly cooled (cooling rate is 1500°C / S) The copper roller is thrown out tangentially to form a scale-shaped strip, and the prepared scale-shaped strip is ground into a granular form through a ball mill and sieved to obtain a certain number of catalyst precursors (60-120 mesh);

[0042] Take 20g of catalyst precursor and quantitative deionized water (the volume ratio of deionized water to catalyst precursor is 8:1) and place in a three-necked flask, stir and mix evenly, then slowly add 25% by weight of hydrogen under stirring Sodium oxide aqueous solution (addition rate is 0.042g / (min·20g nickel-aluminum alloy)) is act...

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Abstract

The invention provides a methanation catalyst, a preparation method and application thereof. Specifically, the method includes: contacting nickel aluminum alloy and alkali in water. The method for preparation of the methanation catalyst consumes low alkali, and the catalyst prepared by the preparation method provided by the invention has the characteristics of difficult spontaneous combustion, high mechanical strength, and good low-temperature methanation performance, is suitable for removal of trace carbon oxides from hydrogen under low temperature, and especially has high activity and high selectivity to carbon dioxide methanation reaction in carbon oxides.

Description

technical field [0001] The present invention relates to a kind of preparation method of methanation catalyst, and a kind of methanation catalyst prepared according to the preparation method of the present invention and its trace carbon oxide (including CO and CO) in dehydrogenation 2 )Applications. Background technique [0002] Hydrogen is an indispensable and important raw material for refining and chemical enterprises to increase the depth of crude oil processing, produce clean fuel and chemical fertilizer industry, and it is also a raw material for many fine chemical production processes. At present, the methods of hydrogen production mainly include: hydrogen production by biological method, hydrogen production by solar energy, hydrogen production by water splitting method (including thermal decomposition and thermochemical decomposition method), hydrogen production by water electrolysis method, and hydrogen production by chemical method. Except for the latter two method...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/83B01J23/80B01J23/883B01J23/86C07C9/04C07C1/12
Inventor 潘智勇慕旭宏宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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