Molybdenum-modified molecular sieve-loaded nickel-based methane dry reforming catalyst as well as preparation method and application thereof

A methane dry reforming and nickel catalyst technology, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex preparation methods, long preparation time, and the catalytic performance of catalysts to be improved, and achieve the goal of preparation The process is simple and the effect of improving the anti-carbon deposition ability

Pending Publication Date: 2021-06-25
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the patent CN110813341A, Fe and Co modified nickel-based catalysts were prepared by ultrasonic-assisted equal-volume impregnation and microwave reduction. The preparation method is complicated, the preparation time is long, and the catalytic performance of the catalyst needs to be improved.
Therefore, it is still a challenging task to find a high-performance nickel-based methane dry catalyst with good dispersion of active components, excellent anti-coking performance, and simple preparation process.

Method used

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  • Molybdenum-modified molecular sieve-loaded nickel-based methane dry reforming catalyst as well as preparation method and application thereof
  • Molybdenum-modified molecular sieve-loaded nickel-based methane dry reforming catalyst as well as preparation method and application thereof

Examples

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Embodiment 1

[0025] In this embodiment, a method for preparing a molybdenum-modified molecular sieve-supported nickel-methyl methane dry reforming catalyst has the following process steps:

[0026] a. according to the ratio of the nickel loading of the molybdenum-modified molecular sieve loaded nickel-based methane dry reforming catalyst prepared according to the target to 6wt%, take nickel nitrate and HZSM-5 molecular sieve and disperse them in deionized water, stir vigorously for 8h; then evaporate Remove the solvent and dry at 80°C for 12 hours; then, in an air atmosphere, heat up at a heating rate of 2°C / min, and heat up to 600°C for 4 hours to obtain a powder product A;

[0027] b. the molar ratio of nickel and molybdenum of the molybdenum-modified molecular sieve supported nickel-based methane dry reforming catalyst prepared according to the target is a ratio of 5:1, and the powder product A obtained in step a and ammonium molybdate are dispersed in deionized water, Stir vigorously f...

Embodiment 2

[0035]In this embodiment, a method for preparing a molybdenum-modified molecular sieve-supported nickel-methyl methane dry reforming catalyst has the following process steps:

[0036] a. According to the ratio of the nickel loading of the molybdenum-modified molecular sieve-loaded nickel-methyl methane dry reforming catalyst prepared according to the target to a ratio of 6 wt%, nickel acetylacetonate and HZSM-5 molecular sieve were weighed and dispersed in deionized water, and vigorously stirred for 8 hours; then Evaporate the solvent, dry at 80°C for 12 hours; then raise the temperature at a rate of 2°C / min in an air atmosphere, and heat up to 600°C for 4 hours to obtain a powder product A;

[0037] b. the molar ratio of nickel and molybdenum of the molybdenum-modified molecular sieve supported nickel-based methane dry reforming catalyst prepared according to the target is a ratio of 5:1, and the powder product A obtained in step a and ammonium molybdate are dispersed in deion...

Embodiment 3

[0043] In this embodiment, a method for preparing a molybdenum-modified molecular sieve-supported nickel-methyl methane dry reforming catalyst has the following process steps:

[0044] a. The molybdenum-modified molecular sieve-loaded nickel-based methane dry reforming catalyst prepared according to the target has a nickel loading of 6wt%, weighs nickel acetate and HY molecular sieves and disperses them in deionized water, stirs vigorously for 8 hours; then evaporates the solvent , dried at 80°C for 12 hours; then, in an air atmosphere, the temperature was raised at a rate of 2°C / min, and the temperature was raised to 600°C for 4 hours to obtain a powder product A;

[0045] b. the molar ratio of nickel and molybdenum of the molybdenum-modified molecular sieve supported nickel-based methane dry reforming catalyst prepared according to the target is a ratio of 5:1, and the powder product A obtained in step a and ammonium molybdate are dispersed in deionized water, Stir vigorousl...

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Abstract

The invention relates to a preparation method of a molybdenum modified molecular sieve loaded nickel-based methane dry reforming catalyst. The catalyst takes a molecular sieve as a carrier, nickel and molybdenum are respectively loaded on the molecular sieve by a sequential impregnation method, and dispersion of active species and strong interaction with the carrier are realized. The molybdenum-modified molecular sieve supported nickel catalyst is obtained through drying, high-temperature calcination and programmed heating reduction, the catalytic activity can be effectively improved, and carbon deposition in the reaction is effectively eliminated through dynamic conversion of molybdenum oxide and molybdenum carbide on the molecular sieve constructed in the reaction. Finally, the catalytic material with high sintering resistance and carbon deposition resistance is obtained. The catalyst has the advantages of simple preparation process, low cost and high catalytic efficiency.

Description

technical field [0001] The invention relates to a nickel-based catalyst supported by a molybdenum-modified molecular sieve, a preparation method and an application, and belongs to the technical fields of nano-catalyst preparation technology and environmental protection. The catalyst can effectively solve the problem of sintering of reactive components under high temperature conditions and carbon deposition in the reaction. Background technique [0002] With the rapid development of society, the combustion and consumption of fossil energy has brought about increasingly serious environmental problems, among which carbon dioxide and methane gas are one of the main culprits causing the greenhouse effect. Methane dry reforming reaction can efficiently utilize CH 4 and CO 2 Conversion to syngas CO and H 2 , on the one hand, this reaction can reduce the use of fossil fuels to alleviate the greenhouse effect, on the other hand, its product H 2 Syngas with a / CO of 1 is the main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/78B01J29/48B01J29/16B01J29/85C01B3/40
CPCB01J29/7815B01J29/48B01J29/166B01J29/85C01B3/40Y02P20/52
Inventor 张登松张晓玉邓江张剑平李红蕊颜婷婷
Owner SHANGHAI UNIV
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