Slurry bed methanation catalyst, preparing method and application

A methanation catalyst and slurry bed technology, applied in the petroleum industry, gas fuel, fuel, etc., can solve the limitation of the industrialization process of the slurry bed methanation process, catalyst particle size, strength and low temperature reaction performance can not be better satisfied, Increase catalyst wear and other problems, achieve the effect of increasing low-temperature activity, small particle size, and good catalytic methanation performance

Inactive Publication Date: 2013-01-16
TAIYUAN UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The slurry bed methanation process overcomes many shortcomings of the industrial fixed bed methanation process, but due to the different reaction processes of the two processes, the catalyst structure and performance requirements are different, mainly in: (1) slurry bed methanation The process has good heat transfer performance. Under the condition that the carbon concentration in the feed gas is high and the single-pass conversion rate of carbon is above 90%, the bed can still be kept at the same temperature. Therefore, the catalyst is required to have a higher specific surface area, smaller and Uniform catalyst particle size and higher activity; (2) The slurry bed reactor requires external equipment stirring or turbulent mixing of raw ma

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  • Slurry bed methanation catalyst, preparing method and application

Examples

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Example Embodiment

[0025] Example 1

[0026] ·Carrier pretreatment: 60~80 mesh, specific surface area is 150m 2 / g of γ-Al 2 O 3 Baking at 400℃ for 1h; impregnation: 2.43g NiCl 2 ·6H 2 O is dissolved in 15ml of water, and it is combined with 10g of roasted γ-Al 2 O 3 Same volume immersion at room temperature for 5h;

[0027] ·Drying and roasting: Put the impregnated sample in an oven and dry it at 90°C for 5 hours. Grind the dried powder and place it in a muffle furnace and roast it at 350°C for 6 hours to obtain NiO / γ-Al 2 O 3 Forebody

[0028] ·Hydrogen reduction: NiO / γ-Al 2 O 3 The volume of the precursor body is 5% H 2 With 95% N 2 Ni / γ-Al is obtained after reduction at 450℃ for 12h in a mixed atmosphere 2 O 3 , The composition of the product catalyst is: Ni5wt%, γ-Al 2 O 3 95wt%;

[0029] The catalyst prepared in this example was carried out in a 500ml slurry-bed high-pressure reactor. The reaction conditions and performance evaluation results are shown in Table 1. The specific steps of the reaction...

Example Embodiment

[0031] Example 2

[0032] ·Carrier pretreatment: 80~100 mesh, specific surface area is 200m 2 / g of γ-Al 2 O 3 Baking at 450℃ for 1.5h;

[0033] Impregnation: 4.86g NiCl 2 ·6H 2 O and O.14gMoCl 5 Dissolve it in 15ml water, and mix it with 10g roasted γ-Al 2 O 3 10h immersion in equal volume at room temperature;

[0034] ·Drying and roasting: Put the impregnated sample in an oven and dry at 100℃ for 10h, ground the dried powder in a muffle furnace and roast it at 400℃ for 5h to obtain NiO / γ-Al 2 O 3 Forebody

[0035] ·Hydrogen reduction: NiO / γ-Al 2 O 3 The volume of the precursor body is 10% H 2 With 90% N 2 Ni / γ-Al is obtained after reduction at 500℃ for 10h in the mixed atmosphere 2 O 3 , The composition of the product catalyst is: Ni 9.05wt%, Mo 0.45wt%, γ-Al 2 0 3 90.50wt%;

[0036] The catalyst prepared in this example was carried out in a 500 ml slurry-bed high pressure reactor. The reaction conditions and performance evaluation results are shown in Table 1, and the specific steps...

Example Embodiment

[0037] Example 3

[0038] ·Carrier pretreatment: 100~120 mesh, specific surface area is 250m 2 / g of γ-Al 2 O 3 Roast at 500℃ for 2h;

[0039] Impregnation: 7.29g NiCl 2 ·6H 2 O and 0.31gLa(NO 3 ) 3 ·6H 2 O is dissolved in 15ml of water, and it is combined with 10g of roasted γ-Al 2 O 3 15h of equal volume immersion at room temperature;

[0040] ·Drying and roasting: Put the impregnated sample in an oven at 110°C for 15h, ground the dried powder and place it in a muffle furnace and roast for 4h at 450°C to obtain NiO / γ-Al 2 O 3 Forebody

[0041] ·Hydrogen reduction: NiO / γ-Al 2 O 3 The volume of the precursor body is 15% H 2 With 95% N 2 Ni / γ-Al is obtained after reduction at 550℃ for 8h in the mixed atmosphere 2 O 3 , The composition of the product catalyst is: Ni 12.93wt%, La 0.86wt%, γ-Al 2 O 3 86.21wt%;

[0042] The catalyst prepared in this example was carried out in a 500 ml slurry-bed high pressure reactor. The reaction conditions and performance evaluation results are shown in T...

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Abstract

A slurry bed methanation catalyst contains the following components, by weight percentage: 5-40wt% of Ni, auxiliaries occupying 0-30wt% of Ni and 60-95wt% of gamma-Al203 carriers. The slurry bed methanation catalyst is used for slurry bed methanation process, and the reaction condition of the catalyst used for the slurry bed methanation process is that the reaction temperature is 280-320 DEG C, the reaction pressure is 1-4 MPa, the catalyst concentration is 1-10wt%, volume concentration of CO and CO2 in raw material gases is respectively 2-30%, and (H2-CO2)/(CO+CO2) is (2.5-3.7):1 according to molar ratio. The slurry bed methanation catalyst, the preparing method and application have the advantages that the slurry bed methanation catalyst is small and uniform in particle size, low-temperature activity of the slurry bed methanation catalyst in the methanation reaction is further improved by filling the auxiliaries, the slurry bed methanation catalyst has good catalytic methanation performance in a temperature range smaller than or equal to 320 DEG C, and the slurry bed methanation catalyst is applicable to the slurry bed methanation process.

Description

technical field [0001] The invention belongs to a catalyst and its preparation method and application, in particular to a supported nickel-based catalyst for slurry bed methanation, its preparation method and application. Background technique [0002] Natural gas is a clean, efficient and convenient high-quality energy. In recent years, with the acceleration of urbanization and the improvement of people's living standards, the gap in my country's demand for natural gas has gradually increased. my country has an energy structure that is rich in coal, poor in oil, and low in gas. Coal-to-synthetic natural gas is a clean and efficient coal conversion technology that is in line with my country's sustainable energy development. Coal-to-natural gas includes three steps of coal gasification, purification and methanation, among which methanation is the core technology of coal-to-natural gas, which refers to the CO and H in the synthesis gas 2 The process of synthesizing methane un...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/883B01J23/83B01J23/887C10L3/08
Inventor 崔晓曦范辉李忠张庆庚闫少伟孟凡会吉可明
Owner TAIYUAN UNIV OF TECH
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