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Preparation method of mesoporous confinement nickel-based methane dry reforming catalyst

A nickel-based methane and catalyst technology is applied in the field of preparation of nickel-based methane dry reforming catalysts, and achieves the effects of low requirements for experimental equipment, inhibition of carbon deposition, and simple preparation process.

Active Publication Date: 2014-02-19
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nickel nanoparticles are difficult to be transported into the mesoporous channels of the carrier, and most of them are still attached to the outer surface of the mesoporous channels, so they cannot play a good role in anti-sintering and anti-carbon deposition.

Method used

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  • Preparation method of mesoporous confinement nickel-based methane dry reforming catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 0.27 g nickel nitrate hexahydrate and 0.5 g SBA-15, the mass fraction of nickel is 10 wt%, nickel nitrate hexahydrate, SBA-15 and 10 mL ethylene glycol were mixed and stirred under vacuum for 24 h, and dried in vacuum. N 2 The heating rate was 1 ℃ / min under the atmosphere, the calcination was performed at 550 ℃ for 4 h, and the calcination was performed under air atmosphere for 2 h. It is then reduced by using H 2 -TPR, first pass N 2 Pretreatment at 300 °C for 30 min, cooled to room temperature with 10% H by volume 2 / N 2 The Ni / SBA-15 nanocatalyst was obtained by reducing the mixed gas (flow rate of 30 mL / min) at 800 °C for 1 h.

[0022] Test the catalytic activity of the above catalyst: Weigh 0.15 g (40-60 mesh) of the prepared catalyst and put it into a fixed-bed quartz tube reactor for catalyst performance testing. The injection volume of CH4 and CO2 is 1:1 (both flows are 15 mL / min), the activity test ranges from 450 °C to 800 °C, the catalyst has a cer...

Embodiment 2

[0024] Weigh 0.28 g nickel acetylacetonate dihydrate and 0.5 g KIT-6, the mass fraction of nickel is 10 wt%, mix nickel acetylacetonate dihydrate, KIT-6 and 10 mL glycerol under vacuum for 18 h, and dry in vacuum , N 2 The heating rate was 1 ℃ / min in the atmosphere, the calcination was performed at 600 ℃ for 4 h, and the calcination was in air atmosphere for 2 h. It is then reduced by using H 2 -TPR, first pass N 2 Pretreatment at 300 °C for 30 min, cooled to room temperature with 10% H by volume 2 / N 2 The Ni / KIT-6 nanocatalyst was obtained by reducing the mixed gas (flow rate of 30 mL / min) at 800 °C for 1 h.

[0025]Test the catalytic activity of the above catalyst: Weigh 0.15 g (40-60 mesh) of the prepared catalyst and put it into a fixed-bed quartz tube reactor for catalyst performance testing. The injection volume of CH4 and CO2 is 1:1 (both flows are 15 mL / min), the activity test ranges from 450 °C to 800 °C, the catalyst has a certain activity at 450 °C, the highes...

Embodiment 3

[0027] Weigh 0.22 g nickel chloride hexahydrate and 0.5 g MCM-41, the mass fraction of nickel is 10 wt%, and mix and stir nickel chloride hexahydrate, MCM-41 and 10 mL 1,4-butanediol under vacuum for 20 h, vacuum dried, N 2 The heating rate was 1 ℃ / min under the atmosphere, the calcination was performed at 600 ℃ for 6 h, and the calcination was performed under air atmosphere for 2 h. It is then reduced by using H 2 -TPR, first pass N 2 Pretreatment at 300 °C for 30 min, cooled to room temperature with 10% H by volume 2 / N 2 The Ni / MCM-41 nanocatalyst was obtained by reducing the mixed gas (flow rate of 30 mL / min) at 800 °C for 1 h.

[0028] Test the catalytic activity of the above catalyst: Weigh 0.15 g (40-60 mesh) of the prepared catalyst and put it into a fixed-bed quartz tube reactor for catalyst performance testing. The injection volume of CH4 and CO2 is 1:1 (both flows are 15 mL / min), the activity test ranges from 450 °C to 800 °C, the catalyst has a certain activit...

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Abstract

The invention discloses a preparation method of a mesoporous confinement nickel-based methane dry reforming catalyst. The methane dry reforming catalyst takes high-temperature-resistant oxide with an orderly mesoporous duct as a carrier, so that nickel is uniformly dispersed in the duct. The preparation method of the methane dry reforming catalyst comprises the steps that mesoporous oxide with high-temperature stability serves as a carrier; a precursor, namely salt of nickel is transported into the mesoporous duct by alcohol under a stirring condition; the internal surface of the mesoporous duct is modified by an alocholic hydroxyl group, so that nickel can be dispersed better; vacuum drying, high-temperature calcination and H2-TPR (Temperature Programmed Reduction) are performed; and the methane dry reforming catalyst with good anti-carbon and anti-sintering property, high activity and high stability is prepared. The method has the advantages that the method is simple in preparation technology, lower in cost, pollution-free, and high in catalysis efficiency.

Description

technical field [0001] The invention relates to a method for preparing a mesoporous-confined nickel-based methane dry reforming catalyst, which belongs to the technical fields of nano-catalyst preparation technology and environmental protection. Background technique [0002] In recent years, the development and utilization of natural gas has attracted more and more attention. There are two main ways of chemical utilization of natural gas, direct method and indirect method. The direct method is to pyrolyze or partially oxidize natural gas to produce organic substances such as methanol and formaldehyde. However, this method has certain complexity in the treatment of tail gas and the use of pure oxygen, which limits its industrial application. The indirect method refers to the conversion of natural gas into synthesis gas (H 2 and CO), and then use syngas as raw material to synthesize some chemical products or liquid fuels, such as methanol, ethanol, dimethyl ether or olefins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C01B3/40
CPCY02P20/52
Inventor 张登松施利毅谢婷张剑平黄垒李红蕊
Owner SHANGHAI UNIV
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