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High-activity and anti-carbon-deposition composite catalyst, preparation method thereof and application thereof in methane dry gas reforming

A composite catalyst and anti-coking technology, applied in chemical instruments and methods, physical/chemical process catalysts, hydrogen/synthesis gas production, etc., can solve the problems of catalyst carbon deposition, nickel particle sintering, collapse, etc., to promote dispersion, Effect of suppressing sintering and simple production method

Active Publication Date: 2020-10-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the methane dry gas reforming reaction is usually carried out at high temperature (>600°C), and the layered double hydroxide with lamellar structure will sinter and collapse at high temperature, which will lead to the sintering of nickel particles and lead to catalyst accumulation. carbon, deactivation

Method used

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  • High-activity and anti-carbon-deposition composite catalyst, preparation method thereof and application thereof in methane dry gas reforming
  • High-activity and anti-carbon-deposition composite catalyst, preparation method thereof and application thereof in methane dry gas reforming
  • High-activity and anti-carbon-deposition composite catalyst, preparation method thereof and application thereof in methane dry gas reforming

Examples

Experimental program
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Effect test

Embodiment 1

[0038] a) Preparation of NiMgAl layered double hydroxide nanosheets: Weigh 1.454g Ni(NO 3) 2 ·6H 2 O, 10.256gMg(NO 3 ) 2 ·6H 2 O, 5.627g Al(NO 3 ) 3 9H 2 O, dissolved in 50mL deionized water, take 200mL NaOH solution with a concentration of 0.1mol / L, add the dissolved nitrate solution into the NaOH solution, and treat at 30°C for 30min. The solution was then suction filtered and washed to pH=7. The obtained solid sample was dispersed in 225mL of deionized water, then loaded into a hydrothermal kettle, and treated at 100°C for 16h to obtain a NiMgAl layered double hydroxide sol.

[0039] b) Preparation of BN nanosheets: Weigh 0.2 g of hexagonal boron nitride and 4 g of urea, put them into a ball mill jar, and ball mill in a nitrogen atmosphere for 2.5 hours at 800 rpm. The urea is removed from the milled sample by dialysis to obtain a BN sol.

[0040] c) Preparation of BN-NiMgAl composite catalyst: drop layered double hydroxide sol and boron nitride sol into deionized ...

Embodiment 2

[0042] a) Preparation of NiCuAl layered double hydroxide nanosheets: Weigh 1.454g Ni(NO 3 ) 2 ·6H 2 O, 9.662g Cu(NO 3 ) 2 ·3H 2 O, 5.627g Al(NO 3 ) 3 9H 2 O, dissolved in 50mL deionized water, take 200mL NaOH solution with a concentration of 0.1mol / L, add the dissolved nitrate solution into the NaOH solution, and treat at 30°C for 30min. The solution was then suction filtered and washed to pH=7. The obtained solid sample was dispersed in 225mL of deionized water, then loaded into a hydrothermal kettle, and treated at 100°C for 16h to obtain a NiCuAl layered double hydroxide sol.

[0043] b) Preparation of BN nanosheets: Weigh 0.2g of hexagonal boron nitride and 4g of urea, put them into a ball mill jar, and ball mill in a nitrogen atmosphere for 2.5 hours at 800rpm. The urea is removed from the milled sample by dialysis to obtain a boron nitride sol.

[0044] c) Preparation of BN-NiCuAl composite catalyst: drop layered double hydroxide sol and boron nitride sol into d...

Embodiment 3

[0046] a) Preparation of NiFeAl layered double hydroxide nanosheets: Weigh 1.454g Ni(NO 3 ) 2 ·6H 2 O, 7.952 g FeCl 2 4H 2 O, 5.627g Al(NO 3 ) 3 9H 2 O, dissolved in 50mL of deionized water, take 200mL of NaOH solution with a concentration of 0.1mol / L, add the dissolved salt solution into sodium hydroxide solution, and treat at 30°C for 30min. The solution was then suction filtered and washed to pH=7. The obtained solid sample was dispersed in 225mL of deionized water, then loaded into a hydrothermal kettle, and treated at 100°C for 16h to obtain a NiFeAl layered double hydroxide sol.

[0047] b) Preparation of BN nanosheets: Weigh 0.2g of hexagonal boron nitride and 4g of urea, put them into a ball mill jar, and ball mill in a nitrogen atmosphere for 2.5 hours at 800rpm. The urea is removed from the milled sample by dialysis to obtain a boron nitride sol.

[0048] c) Preparation of BN-NiFeAl composite catalyst: drop layered double hydroxide sol and boron nitride sol i...

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Abstract

The invention relates to a high-activity and anti-carbon-deposition composite catalyst and a preparation method and application thereof in methane dry gas reforming, and belongs to the technical fieldof industrial catalysis. The composite catalyst is a metal / metal oxide and boron nitride composite structure, the metal component comprises nickel, and the metal oxide component is aluminum oxide ora mixture of aluminum oxide and magnesium oxide. The catalyst is obtained by driving and compounding nickel-containing layered double hydroxide nanosheets and boron nitride nanosheets through liquid-phase surface charges, roasting and reducing. The metal oxide realizes dispersion and anchoring of nickel, through the physical isolation effect of boron nitride, anchoring of nickel and metal oxide isachieved, nickel particle sintering is effectively inhibited and the catalyst shows excellent catalytic activity, sintering resistance and carbon deposition resistance in a methane dry gas reformingreaction.

Description

technical field [0001] The invention belongs to the technical field of industrial catalysis, and in particular relates to a high-activity, carbon-deposition-resistant composite catalyst, a preparation method thereof, and an application in methane dry gas reforming. Background technique [0002] Methane (CH 4 ) is the main component of natural gas, with a mass fraction of about 83-99%. Realizing the efficient conversion and utilization of methane is the key to substituting natural gas for petroleum production of liquid fuels or chemicals. The methane dry gas reforming reaction is through the reaction of methane and carbon dioxide to produce H in a ratio of about 1 / 1 2 and CO. On the one hand, H 2 And CO is the raw material of Fischer-Tropsch synthesis reaction, which can produce low-carbon alkanes, alcohols or oils; in addition, by consuming a large amount of CO 2 This greenhouse gas can effectively slow down the greenhouse effect, and it is a reaction route with great in...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02C01B3/40
CPCB01J27/24C01B3/40C01B2203/0238B01J35/393B01J35/23B01J35/40Y02P20/52
Inventor 陆安慧王阳贺雷
Owner DALIAN UNIV OF TECH
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