Preparation method for rapidly preparing highly-dispersed nickel-based catalyst for methane reforming with carbon dioxide

A reforming catalyst, carbon dioxide technology, applied in catalyst activation/preparation, molecular sieve catalyst, physical/chemical process catalyst, etc., can solve the problems of difficult to obtain dispersion catalyst, reduced catalyst activity, long cycle, etc., and achieves simple preparation process, The effect of strong interaction, good resistance to sintering and carbon deposition

Inactive Publication Date: 2016-10-12
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the main disadvantage of Ni catalyst is the problem of serious carbon deposition, which leads to the reduction of catalyst activity.
In addition, using traditional methods such as impregnation to prepare catalysts not only takes a long time, but also makes it difficult to obtain catalysts with good dispersion.

Method used

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  • Preparation method for rapidly preparing highly-dispersed nickel-based catalyst for methane reforming with carbon dioxide
  • Preparation method for rapidly preparing highly-dispersed nickel-based catalyst for methane reforming with carbon dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Weigh 4g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) and dissolve it in 120mL hydrochloric acid with a concentration of 2mol / L, stir in a constant temperature water bath (35°C) After 2 hours, after complete dissolution, 9 mL tetraethyl orthosilicate was added dropwise and stirred for 20 hours, then crystallized in an autoclave at 100°C for 24 hours, filtered, and dried to prepare the non-detemplated mesoporous material SBA-15. Weigh 0.2607g of nickel nitrate and 1g of undetemplated SBA-15 and grind them in a mortar with a nickel loading of 5wt%. Thoroughly grind to mix nickel nitrate and SBA-15 thoroughly, dry overnight at 100°C, and then heat up to 550°C for 4 hours in air atmosphere at a rate of 1°C / min. With pure H at a flow rate of 15 mL / min and a temperature of 700 °C 2 After flow reduction for 1 h, a highly dispersed nickel-based methane carbon dioxide reforming catalyst was obtained. The transmission electron microscope...

Embodiment 2

[0024] Weigh 6g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) and dissolve it in 210mL of deionized water, then add 11.8g of hydrochloric acid (35%), in a constant temperature water bath Stir at medium temperature (35°C) for 40min, after complete dissolution, add 6mL of n-butanol drop by drop, stir at 35°C for 1h, then add 12.9g of tetraethyl orthosilicate and stir for 24h, then place in the autoclave at 100°C Crystallize for 24 hours, filter, and dry to prepare the non-detemplated mesoporous material KIT-6. Weigh 0.2607g of nickel nitrate and 1g of undetemplated KIT-6 and grind them in a mortar with a nickel loading of 5wt%. Thoroughly grind to mix nickel nitrate and KIT-6 thoroughly, dry overnight at 100°C, and then heat up to 550°C for 4 hours in air atmosphere at a rate of 1°C / min. With pure H at a flow rate of 15 mL / min and a temperature of 700 °C 2 flow reduction for 1 h to obtain a highly dispersed nickel-based methane carbon d...

Embodiment 3

[0027] Weigh 3g of polypropylene glycol-ethylene oxide triblock copolymer (F127) and dissolve it in 185mL of hydrochloric acid with a concentration of 2mol / L, stir in a constant temperature water bath (at 25°C), and add 3.6g of trimethyl Benzene (TMB) and 15g KCl were stirred for 2 hours, 12.5g tetraethyl orthosilicate was added dropwise and stirred for 24 hours, and then crystallized in a high-pressure reactor at 100°C for 24 hours, filtered, and dried to prepare the non-detemplated mesoporous material FDU -12 carriers. Weigh 0.2048g of nickel nitrate and 1g of FDU-12 without template removal and grind them in a mortar with a nickel loading of 4wt%. Thoroughly grind to mix nickel nitrate and FDU-12 thoroughly, dry overnight at 100°C, and then heat up to 550°C for 4 hours in air atmosphere at a rate of 1°C / min. With pure H at a flow rate of 15 mL / min and a temperature of 700 °C 2 flow reduction for 1 h to obtain a highly dispersed nickel-based methane carbon dioxide reformin...

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Abstract

The invention discloses a preparation method for rapidly preparing a highly-dispersed nickel-based catalyst for methane reforming with carbon dioxide. A high-temperature-resistant mesoporous material with a large specific surface area and ordered mesoporous passages is adopted as a carrier of the catalyst, a nickel precursor salt and the mesoporous material are ground and stirred to uniformly disperse the nickel precursor salt on the surface of the mesoporous material carrier which is not de-molded by adopting a solid-state grinding method, and during drying, the nickel precursor salt enters the passages to obtain a nickel catalyst with highly-dispersed active ingredients and high carbon deposition resistance and sintering resistance by calcination and H2 reduction. The preparation method has the advantages of simple preparation process, high catalysis efficiency, energy saving (calcination is not required during preparation of the carrier), uniform distribution of the active ingredients and the like.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation technology and environmental protection, and relates to a preparation method for rapidly preparing a highly dispersed nickel-based methane carbon dioxide reforming catalyst. Background technique [0002] Natural gas reserves are far greater than oil reserves. Natural gas has become the third largest energy source after coal and oil. Given CH 4 The yield of direct conversion into organic chemicals is too low, which is still far from the goal of industrialization, and the conversion of natural gas into synthesis gas (CO+H 2 ), which is further converted into various liquid fuels such as gasoline, diesel, methanol, ethylene glycol and olefins or other organic chemical products through F-T reaction. This indirect conversion method has become one of the hot topics in the world today. There are three main ways to produce synthesis gas from methane reforming: steam reforming of methane, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/035B01J37/00B01J35/10C01B3/40
CPCB01J29/0356B01J35/10B01J37/0036C01B3/40C01B2203/0238C01B2203/1058Y02P20/52
Inventor 张秋林龙开先宁平张腾飞王明智王静刘昕宋忠贤
Owner KUNMING UNIV OF SCI & TECH
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