Catalyst with double-alloy composite micro-mesoporous structure as well as preparation method and application of catalyst

A catalyst and dual-alloy technology, applied in the field of preparation of catalysts with dual-alloy composite micro-mesoporous structure, can solve the problems of high catalyst deactivation speed, high price, sintering loss of active components, etc., and improve the anti-coking performance. And anti-sintering ability, improve activity and stability, reduce the effect of carbon deposition

Active Publication Date: 2020-04-14
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]At present, in the CH4-CO2 reforming conversion process, the catalysts are mainly divided into noble metal catalysts (Ru, Pd, Pt, etc.) and non-noble metal catalysts (Fe, Co, Ni, etc.), among them, noble metal catalysts have good catalytic activity and carbon deposition resistance, but because noble metal catalysts are expensive, scarce resources, and under high temperature conditions The active components of noble metal catalysts will be sintered and lost, making it difficult to apply on a large s

Method used

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  • Catalyst with double-alloy composite micro-mesoporous structure as well as preparation method and application of catalyst
  • Catalyst with double-alloy composite micro-mesoporous structure as well as preparation method and application of catalyst
  • Catalyst with double-alloy composite micro-mesoporous structure as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation of a catalyst with a double-alloy composite micro-mesoporous structure comprises the following steps:

[0049] Weigh 2.5g of urea and dissolve it in 50mL of deionized water to form an alkaline solution, put 5g of microporous molecular sieve ZSM-5 in the alkaline solution, then seal the above mixture in a 100mL hydrothermal kettle, and place in 150°C water Heat treatment for 48 hours, wash the product in the hydrothermal kettle with deionized water until neutral, then oven-dry it at 110°C for 2 hours, then place it in a muffle furnace, raise the temperature to 550°C at 2°C / min, and bake at 550°C for 3 hours, A catalyst support is prepared, the catalyst support comprising silica having a micro-mesoporous structure.

[0050] Weigh 0.331g of nickel chloride, 0.376g of lanthanum nitrate, and 0.132g of tin tetrachloride, dissolve them in 5mL of deionized water to form a metal solution, impregnate the metal solution on 3g of the prepared catalyst carrier, and c...

Embodiment 2

[0055] The preparation of a catalyst with a double-alloy composite micro-mesoporous structure comprises the following steps:

[0056] Weigh 1.5g potassium carbonate and dissolve it in 50mL deionized water to form an alkaline solution, put 5g microporous molecular sieve ZSM-5 in the alkaline solution, then seal the above mixture in a 100mL hydrothermal kettle, and heat at 140°C Hydrothermal treatment for 24 hours, wash the product in the hydrothermal kettle with deionized water until neutral, then oven-dry at 110°C for 2 hours, then place it in a muffle furnace, raise the temperature to 550°C at 2°C / min, and roast at 550°C for 3 hours , to prepare a catalyst carrier, the catalyst carrier includes silicon dioxide with a micro-mesoporous structure.

[0057] Weigh 0.28g nickel nitrate, 0.376g lanthanum nitrate, 0.066g tin tetrachloride, dissolve in 5mL deionized water to form a metal solution, impregnate the metal solution on 3g of the prepared catalyst carrier, and continue to st...

Embodiment 3

[0062] The preparation of a catalyst with a double-alloy composite micro-mesoporous structure comprises the following steps:

[0063] Weigh 1.5g potassium carbonate and dissolve it in 50mL deionized water to form an alkaline solution, put 5g microporous molecular sieve ZSM-5 in the alkaline solution, then seal the above mixture in a 100mL hydrothermal kettle, and heat at 140°C After hydrothermal treatment for 24 hours, wash the product in the hydrothermal kettle with deionized water to neutrality, then oven-dry it at 110°C for 2 hours, then place it in a muffle furnace, raise the temperature to 550°C at 2°C / min, and roast at 550°C for 3 hours. A catalyst support is prepared, the catalyst support comprising silica having a micro-mesoporous structure.

[0064] Weigh 0.37g nickel nitrate, 0.188g lanthanum nitrate, 0.066g tin tetrachloride, dissolve in 5mL deionized water to form a metal solution, impregnate the metal solution on 3g of the prepared catalyst carrier, and continue t...

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Abstract

The invention provides a catalyst with a double-alloy composite micro-mesoporous structure, a preparation method and application, the catalyst comprises a catalyst active component and a catalyst carrier, the catalyst active component comprises double alloys, the double alloys comprise a nickel-tin alloy and a nickel-lanthanum alloy, and the catalyst carrier comprises silicon dioxide with a micro-mesoporous structure; due to the existence of the double alloys, the electronic structure around active metal nickel particles can be effectively adjusted, adsorption and activation of methane and carbon dioxide are promoted, the activity of the catalyst is improved, and the carbon deposition resistance and the sintering resistance of the nickel particles are improved; through the silicon dioxidecatalyst carrier with the composite micro-mesoporous structure, the dispersity of active components of the catalyst can be improved, the sintering of nano nickel particles is inhibited, the carbon deposition phenomenon of the catalyst is reduced, and the activity and stability of the catalyst are improved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a catalyst with a double-alloy composite micro-mesoporous structure, a preparation method and an application. Background technique [0002] Methane (CH 4 ) and carbon dioxide (CO 2 ) is the main source of gas that causes the global warming effect, and is also an important carbon-containing resource. Promoting its efficient utilization of resources has important environmental protection significance and economic value. [0003] Through methane carbon dioxide (CH 4 -CO 2 ) reforming reaction can effectively utilize these two greenhouse gases to produce H 2 Syngas with a / CO ratio close to 1 is used as raw material for further carbonylation and Fischer-Tropsch synthesis to reduce CO 2 emission, which is of environmental significance. Also, by CH 4 -CO 2 The reforming reaction realizes the transformation of chemical energy, and can also transport external energy such as solar...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/835B01J35/00B01J35/10C01B3/40
CPCB01J35/0066B01J35/006B01J35/1057B01J35/1061B01J23/83B01J23/835C01B3/40C01B2203/0238C01B2203/1058C01B2203/1082C01B2203/1241Y02P20/52
Inventor 张军孙予罕孔文波刘曙光陆娜
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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