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Nano nickel-based methanation catalyst as well as preparation method and applications thereof

A methanation catalyst, catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of agglomeration of active components, unsatisfactory activity, small specific surface area, etc., to promote dispersion. , The effect of improving catalyst mass transfer and increasing specific surface area

Active Publication Date: 2014-05-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the active components of the methanation catalyst prepared by the solution combustion method have obvious agglomeration, small pore size and small specific surface area, and the activity is still not ideal.
For this reason, Taiyuan University of Technology has developed a new slurry bed methanation catalyst (CN102872874A) prepared by an improved solution combustion method. Its catalytic activity is improved, but the activity decreases rapidly in the slurry bed reaction.

Method used

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  • Nano nickel-based methanation catalyst as well as preparation method and applications thereof
  • Nano nickel-based methanation catalyst as well as preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 7.8g of nickel nitrate, 51.5g of aluminum nitrate, 1.7g of zirconium oxynitrate, 0.3g of europium nitrate and 15g of urea, 3g of P123, dissolve in 70mL of deionized water and stir evenly, pour the solution into a ceramic evaporating dish, microwave radiation wavelength 12cm, power 70W / mL solution under the conditions of ignition, the remaining powder after combustion is collected, ground and granulated to 60-100 mesh to obtain a nickel-based methanation catalyst, the catalyst composition is: NiO20wt.%, Al 2 o 3 70wt.%, ZrO 2 9wt.%, Eu 2 o 3 1wt.%.

[0032] The catalyst was heated at 15% H 2 with 85%N 2 In the atmosphere, reduce at 400℃ for 10h in a fixed bed with a space velocity of 1000mL / (g·h). See attached table 1 for the activity evaluation conditions and results of the catalyst in the synthesis gas to methane reaction. Specific steps are as follows:

[0033] Inject a certain amount of the above-mentioned catalyst and 120mL of inert liquid medium into ...

Embodiment 2

[0035]Weigh 11.7g of nickel nitrate, 47.8g of aluminum nitrate, 1.3g of samarium nitrate, 5g of ethylene glycol and 5g of P123, dissolve in 70mL of deionized water and stir evenly, pour the solution into a ceramic evaporating dish, microwave radiation wavelength 10cm, power 90W / mL solution, the remaining powder after combustion was collected, ground and granulated to 80-120 mesh to obtain a nickel-based methanation catalyst, the catalyst composition: NiO30wt.%, Al 2 o 3 65wt.%, Sm 2 o 3 5wt.%.

[0036] The catalyst was heated in 10% H 2 with 90%N 2 In the atmosphere, reduce at 700℃ for 2h in a fixed bed with a space velocity of 10000mL / (g·h). See attached table 1 for the activity evaluation conditions and results of the catalyst in the synthesis gas to methane reaction. Concrete steps are as shown in embodiment 1.

Embodiment 3

[0038] Weigh 15.6g nickel nitrate, 18.4g aluminum nitrate, 7.4g zirconium oxynitrate, 0.2g holmium nitrate, 7g glycine, 3g P123, dissolve in 100mL deionized water and stir evenly, pour the solution into a ceramic evaporating dish, microwave radiation wavelength 15cm, power 50W / mL solution under the conditions of ignition, the remaining powder after combustion is collected, ground and granulated to 100-140 mesh to obtain a nickel-based methanation catalyst, the catalyst composition is: NiO35wt.%, Al 2 o 3 25wt.%, ZrO 2 39wt.%, Ho 2 o 3 1wt.%.

[0039] The catalyst was heated at 5% H 2 with 95%N 2 In the atmosphere, reduce at 500℃ for 5h in a fixed bed with a space velocity of 2500mL / (g·h). See attached table 1 for the activity evaluation conditions and results of the catalyst in the synthesis gas to methane reaction. Concrete steps are as shown in embodiment 1.

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Abstract

The invention discloses a nano nickel-based methanation catalyst which comprises the following components in percentage by weight: 20-35 % of NiO, 55-79 % of a carrier, and 0.1-10 % of a structure additive. The nano nickel-based methanation catalyst disclosed by the invention has the advantages that the catalyst is applicable to a slurry bed methanation process, high in catalytic activity, and good in stability.

Description

technical field [0001] The invention belongs to a methanation catalyst, in particular to a nanometer nickel-based catalyst used for slurry bed methanation. Background technique [0002] As the main component of natural gas, methane is non-toxic and non-corrosive, has a high calorific value, is safe to use, and is convenient for long-distance transportation. It can partially replace coal gas as civil fuel and industrial raw material. The use of natural gas in my country is large and growing rapidly, and natural gas directly exploited is difficult to meet civil and industrial needs. As an alternative product, coal-based natural gas can effectively make up for the gap in natural gas production, reduce import dependence, and improve national energy security. [0003] At present, the methanation technology in coal-to-natural gas mostly adopts fixed-bed methanation process, and the catalyst adopts supported Ni-based catalyst. Due to the large amount of heat released by the metha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/755B01J37/34C07C1/04C07C9/04
Inventor 孟凡会李忠吉可明高源郑华艳章日光任瑞鹏
Owner TAIYUAN UNIV OF TECH
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