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Preparation method of anti-carbon deposition and anti-sintering monolithic methane dry reforming catalyst

A monolithic catalyst, methane dry reforming technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of uneven distribution of active components, easy Carbon deposition activity degradation, cumbersome preparation steps and other problems, to achieve good anti-carbon deposition and anti-Ni particle sintering performance, is conducive to catalyzing methane dry reforming reaction, and improve the effect of specific surface area

Active Publication Date: 2015-03-25
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of existing methane dry reforming catalysts, such as cumbersome preparation steps, uneven distribution of active components, easy sintering, and easy carbon deposition and activity degradation, and provide a monolithic catalyst that does not require molding and a preparation method thereof. The methane dry reforming catalyst is a multi-metal hydroxide directly grown on a wire mesh by a hydrothermal method, and the active component Ni-loaded multi-metal oxide is obtained after high-temperature calcination and reduction.

Method used

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  • Preparation method of anti-carbon deposition and anti-sintering monolithic methane dry reforming catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First remove the surface oxides of the metal wire mesh in dilute acid, and then ultrasonically treat it in ethanol and water respectively;

[0021] Put the wire mesh into 0.04 mol / L Ni(NO 3 ) 2 , 0.10 mol / L Mg(NO 3 ) 2 and 1.0 mol / L NH 4 In the mixed solution of Cl, the pH value was adjusted to 6.5 with 1 wt% ammonia solution. All transferred to a Teflon-lined autoclave, 150 o C water for 12 h. In situ growth to obtain the multi-component metal hydroxide film wire mesh with absolute ethanol, drying. The resulting barbed wire was heated in a tube furnace from room temperature to 600 o C, calcined for 4 h at 10 mol% H 2 content of H 2 and N 2 700 in the mixture o C was reduced for 1 h to obtain the final product. from figure 1 It can be seen that the surface of the catalyst obtained after calcination is a dense sheet-like array, and the Ni particles are uniformly dispersed on the nanosheets.

[0022] The method for the catalyst methane dry reforming test is:...

Embodiment 2

[0024] First remove the surface oxides of the metal aluminum wire mesh in dilute alkali, and then ultrasonically treat it in ethanol and water respectively;

[0025] Put the aluminum wire mesh into 0.1mol / L Ni(NO 3 ) 2 , 2 mol / L Mg(NO 3 ) 2 and 6.0 mol / L NH 4 In the mixed solution of Cl, the pH value was adjusted to 6.5 with 1 wt% ammonia solution. All transferred to a Teflon-lined autoclave, 120 o C water for 24 h. The aluminum wire mesh of the multi-component metal hydroxide film obtained by in-situ growth was dried with absolute ethanol. The resulting aluminum wire mesh was heated in a tube furnace from room temperature to 700 o C, calcined for 2 h at 10 mol% H 2 content of H 2 and N 2 650 in mixture o C was reduced for 2 h to obtain the final product.

[0026] The test conditions are the same as in Example 1, at a reaction temperature of 750 o C, measured CH 4 and CO 2 The conversion rate is over 85%. Compared with the traditional magnesium-aluminum mixed o...

Embodiment 3

[0028] First remove the surface oxides of the metal stainless steel wire mesh in dilute acid, and then ultrasonically treat it in ethanol and water respectively;

[0029] Put stainless steel wire mesh into 3 mol / L Ni(NO 3 ) 2 , 8 mol / L Mg(NO 3 ) 2 and 10.0 mol / L NH 4In the mixed solution of Cl, the pH value was adjusted to 6.5 with 1 wt% ammonia solution. All were transferred to a Teflon-lined autoclave, 200 o C water for 8 h. The stainless steel wire mesh obtained by in-situ growth of the multi-component metal hydroxide film was dried with absolute ethanol. The resulting stainless steel wire mesh was heated in a tube furnace from room temperature to 550 o C, calcined for 6 h at 10 mol% H 2 content of H 2 and N 2 750 in mixture o C was reduced for 1.5 h to obtain the final product.

[0030] The test conditions are the same as in Example 1, at a reaction temperature of 750 o C, measured CH 4 and CO 2 The conversion rate is over 85%. Compared with the traditiona...

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Abstract

The invention discloses a preparation method of an anti-coking and anti-sintering monolithic methane dry reforming catalyst. The methane dry reforming catalyst directly grows a multi-element metal hydroxide on a wire mesh in situ by a hydrothermal method, and undergoes high-temperature calcination and reduction to obtain an active component nickel-supported multi-element metal oxide. The surface morphology of the catalyst is a dense sheet-like array. In addition, the catalyst has the advantages of low cost, low load of active components and uniform distribution, anti-coking and anti-sintering, no need for molding, and has potential industrial application prospects.

Description

technical field [0001] The invention belongs to the field of catalyst preparation and relates to a preparation method of an anti-coking and anti-sintering monolithic methane dry reforming catalyst. Background technique [0002] As the main component of natural gas, methane is not only directly used as a primary fuel, but also produced into chemical products through direct industrial conversion and indirect industrial conversion. Due to the low yield and high energy consumption of direct conversion of methane, there is no competition for industrial products starting from petroleum. The indirect conversion of methane can produce synthesis gas, which can be further converted into important chemical fuels and products such as gasoline, methanol, acetone and various olefins through the Fischer-Tropsch reaction. Therefore, the production of syngas from methane determines the cost and industrial scale of indirect utilization of methane, which has attracted more and more people's a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/40B01J23/755
CPCY02P20/52
Inventor 张登松施利毅杜宪军张剑平
Owner SHANGHAI UNIV
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