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A dual mesoporous structure ni/sio for partial oxidation of methane 2 ‑zro 2 Catalyst preparation method

An oxidation reaction and double mesoporous technology, which is applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc. Mesoporous structure with complex process, uniform pore size distribution and large specific surface area

Active Publication Date: 2018-02-27
清创人和生态工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above three methods all use a template agent, which increases the preparation cost of the catalyst

Method used

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  • A dual mesoporous structure ni/sio for partial oxidation of methane <sub>2</sub> ‑zro <sub>2</sub> Catalyst preparation method
  • A dual mesoporous structure ni/sio for partial oxidation of methane <sub>2</sub> ‑zro <sub>2</sub> Catalyst preparation method
  • A dual mesoporous structure ni/sio for partial oxidation of methane <sub>2</sub> ‑zro <sub>2</sub> Catalyst preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] 1) Add 0.71g of Zr(NO 3 ) 2 .5H 2 O was dissolved in 7.4 mL of deionized water and stirred for 0.5 h;

[0026] 2) Use the equal volume impregnation method to impregnate the solution obtained in step 1) in 5.0 g of SiO with a larger pore size 2 , baked at 600°C for 2h;

[0027] 3) Add 0.78g of Ni (NO 3 ) 2 .6H 2 O was dissolved in 4.2 mL of deionized water and stirred for 0.5 h;

[0028] 4) Also use the same volume impregnation method to impregnate 3.0 g of the double mesoporous SiO obtained in step 2) with the solution obtained in 3) 2 -ZrO 2 , drying at 110°C for 12h, calcination at 400°C, 500°C, 600°C, 700°C for 4h;

[0029] 5) The prepared catalyst was crushed to 40-60 mesh, under normal pressure, the reaction temperature was 600 °C, and the space velocity was 5×10 4 mL·g -1 h -1 Under these conditions, the conversion rate of methane is 80-90%.

Embodiment approach 2

[0031] 1) Add 0.71g of Zr(NO 3 ) 2 .5H 2 O and 0.78g Ni (NO 3 ) 2 .6H 2 O was simultaneously dissolved in 7.4 mL of deionized water and stirred for 0.5 h;

[0032] 2) Use the equal volume impregnation method to impregnate the solution obtained in step 1) in 5.0 g of SiO with a larger pore size 2, dried at 110°C for 12h, and calcined at 600°C for 4h;

[0033] 3) The prepared catalyst was crushed to 40-60 mesh, under normal pressure, the reaction temperature was 600 °C, and the space velocity was 5×10 4

[0034] mL·g -1 h -1 Under these conditions, the methane conversion rate was 83%.

Embodiment approach 3

[0036] 1) Dissolve 0.44g ZrO with deionized water 2 The sol was diluted to 7.5mL and stirred for 0.5h;

[0037] 2) Use the equal volume impregnation method to impregnate the solution obtained in step 1) in 5.0 g of SiO with a larger pore size 2 , baked at 700°C for 4h;

[0038] 3) Add 0.78g of Ni (NO 3 ) 2 .6H 2 O was dissolved in 4.2mL of ethanol and stirred for 0.5h;

[0039] 4) Also use the same volume impregnation method to impregnate the solution obtained in 3) into 3 g of the double mesoporous SiO obtained in step 2). 2 -ZrO 2 , dried in vacuum at 80°C for 12h, and fired at 600°C for 4h;

[0040] 5) The prepared catalyst was crushed to 40-60 mesh, under normal pressure, the reaction temperature was 600 °C, and the space velocity was 5×10 4 mL·g -1 h -1 Under these conditions, the conversion rate of methane is 85%.

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Abstract

The invention discloses a method for preparing a bimodal mesoporous structure Ni / SiO2-ZrO2 catalyst used for partial oxidation of methane and belongs to the technical field of the natural gas chemical industry and the coal chemical industry. The bimodal mesoporous structure Ni / SiO2-ZrO2 catalyst loaded with the active component nickel is prepared with the impregnation method, the catalyst has a large specific surface area and a large pore volume, and pore size distribution is even. The preparing method is simple, catalytic activity on partial oxidation of methane is quite high, and catalyst deactivation caused by sintering and carbon deposition can be effectively restrained. The Ni / SiO2-ZrO2 bimodal mesoporous material has two mesoporous diameters, the larger diameter can meet the requirement of diffusion of reactants and products, and the smaller diameter enables adsorption and reaction places to be available for reactants; meanwhile, pore size distribution is narrow and can be adjusted within a certain range, so that requirements of different reactions can be met, and a new way is provided for development of new industrial catalysts. The preparing method is simple, the reaction condition is mild, and industrial production is facilitated.

Description

technical field [0001] A kind of double mesoporous Ni / SiO used for methane partial oxidation reaction of the present invention 2 -ZrO 2 The catalyst preparation method belongs to the technical fields of natural gas chemical industry and coal chemical industry. It specifically relates to a method for preparing Ni / SiO with double mesoporous structure by impregnation method. 2 -ZrO 2 Catalyst scheme. Background technique [0002] Mesoporous SiO 2 It is a porous solid material with a pore size between 2 and 50 nm. Due to its large specific surface area, regular pore structure, adjustable pore size, good hydrothermal stability, and large adsorption pore volume, it has been widely used in catalysis and medicine. Dual mesoporous materials can combine the advantages of each pore size, which can greatly improve the performance of catalysts. For example, for the large mesoporous materials in double mesoporous materials, due to their large pore size and small diffusion resistanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J35/10B01J37/02
CPCB01J23/755B01J35/1061B01J37/0205
Inventor 王俊文艾刚刚丁传敏张侃刘平
Owner 清创人和生态工程技术有限公司
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