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Loaded type nickel-based catalyst used for slurry bed methanation, and preparation method and application thereof

A nickel-based catalyst and supported technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of difficulty in controlling the crystal phase structure of the specific surface area of ​​the catalyst in the solution combustion process, and the poor reproducibility of the catalyst. Limit applications and other issues to achieve the effects of improved catalytic performance and stability, reduced preparation energy consumption, and shortened preparation time

Inactive Publication Date: 2015-01-07
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the uncontrollability of the solution combustion process in the preparation process of this method, it is difficult to control the specific surface area of ​​the prepared catalyst and the crystal phase structure of the carrier, and the reproducibility of the catalyst is poor, which limits its large-scale industrial application.

Method used

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  • Loaded type nickel-based catalyst used for slurry bed methanation, and preparation method and application thereof
  • Loaded type nickel-based catalyst used for slurry bed methanation, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Weigh 6.2g nickel nitrate, fully dissolve in 3.7ml water, add 1.3g ethylene glycol to the solution, then slowly add γ-Al 2 o 3Carrier powder 5g, impregnated at room temperature for 24 hours under stirring conditions, pour the suspension into a ceramic evaporating dish, put it in a muffle furnace, heat to 300°C, and burn by itself, collect the remaining powder after combustion, grind and granulate to 100 In a fixed bed, at 550°C, the volume composition is 5% H 2 with 95%N 2 , the space velocity is 2000ml / (g·h) and reduced for 4h to obtain the methanation nickel-based catalyst. The catalyst composition is: NiO 24wt.%, carrier 76wt.%.

[0034] The specific conditions and results of the activity evaluation of the catalyst in the reaction of syngas to methane are shown in Table 1. Specific steps are as follows:

[0035] A certain quality of the above-mentioned catalyst and 120ml of liquid solvent are injected into the reactor of a 250ml slurry bed reactor. At room temp...

Embodiment 2

[0037] Weigh 9.9g nickel nitrate, 0.2g cobalt nitrate, fully dissolve in 10ml water, add 5.1g urea to the solution, then slowly add ZrO 2 Carrier powder 5g, impregnated at room temperature for 6h under stirring conditions, pour the suspension into a ceramic evaporating dish, put it in a muffle furnace, heat to 600°C, and burn by itself, collect the remaining powder after combustion, grind and granulate to 200 At 650°C in a fixed bed, the volume composition is 10% H 2 with 90% N 2 , the space velocity is 3000ml / (g·h) and reduced for 5h to obtain the methanation nickel-based catalyst. The catalyst is composed of: NiO 33wt.%, carrier 66wt.%, additive (cobalt oxide) 1wt.%.

[0038] The specific conditions and results of the activity evaluation of the catalyst in the reaction of syngas to methane are shown in Table 1. Concrete steps are as shown in embodiment 1.

Embodiment 3

[0040] Weigh 8.7g of nickel nitrate, 0.3g of lanthanum nitrate, fully dissolve in 15ml of water, add 1.9g of urea to the solution, and then slowly add SiO 2 Carrier powder 5g, impregnated at room temperature for 12h under stirring conditions, pour the suspension into a ceramic evaporating dish, put it in a muffle furnace, heat to 400°C, and burn by itself, collect the remaining powder after combustion, grind and granulate to 150 At 650°C in a fixed bed, the volume composition is 15% H 2 with 85% N 2 , Space velocity 1000ml / (g·h) condition reduction 6h, obtains the methanation nickel-based catalyst. The catalyst is composed of: 30wt.% of NiO, 69wt.% of carrier, and 1wt.% of additive (lanthanum oxide).

[0041] The specific conditions and results of the activity evaluation of the catalyst in the reaction of syngas to methane are shown in Table 1. Concrete steps are as shown in embodiment 1.

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Abstract

The invention relates to a loaded type nickel-based catalyst used for slurry bed methanation, and a preparation method and an application thereof. The loaded type nickel-based catalyst is composed of, by weight, 10-40 wt% of NiO, 56-90 wt% of a carrier and 0-4 wt% of an auxiliary agent. The loaded type nickel-based catalyst is prepared by the steps of preparing a soluble salt solution of 0.5-1.3 g / mL nicdel nitrate and the auxiliary agent; adding a catalyst carrier and a soluble organic fuel to the salt solution in sequence; impregnating for 6-24 h while stirring; heating the solution for concentration in a water bath with a temperature of 60-90 DEG C after finishing the impregnation, or heating for igniting the solution at a temperature of 300-700 DEG C directly; collecting the combustion residue powder, grinding the powder and granulating, and reducing for 2-6 h with a reducing gas on a fixed bed at a temperature of 500-700 DEG C. The loaded type nickel-based catalyst has a slurry bed methanation process, and has the advantages of good and stable catalytic performance, and can be used for large-scale industrialization.

Description

technical field [0001] The invention belongs to a supported nickel-based catalyst, its preparation method and application, in particular to a slurry bed methanation nickel-based catalyst prepared by an impregnated combustion method, its preparation method and its application. Background technique [0002] Methane is an important fuel and chemical intermediate, which can be used in the synthesis of various compounds such as ethylene, acetylene, and formaldehyde. In recent years, with the rapid increase in the demand for natural gas in my country, the gap between the supply and demand of domestic natural gas resources has gradually increased. Using coal-to-synthesis gas as raw material and producing substitute natural gas through methanation reaction is an effective way to improve domestic natural gas supply. Methanation is the core technology of coal-to-natural gas, the reaction refers to CO or CO 2 Synthesis of CH by hydrogenation under the action of catalyst 4 and H 2 O...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/83B01J37/00C10L3/08
Inventor 李忠吉可明范辉孟凡会张庆庚闫少伟崔晓曦曹会博
Owner TAIYUAN UNIV OF TECH
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