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Sulfur tolerant catalyst suitable for slurry bed methanation, its preparation method and application

A catalyst and slurry bed technology, which is applied in the field of synthetic methane catalyst and preparation, can solve the problems of easy deactivation and low sulfur tolerance of the catalyst, and achieve the effects of increasing low-temperature activity, good reactivity, and improving utilization rate

Inactive Publication Date: 2013-10-23
SEDIN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of catalyst can tolerate sulfur to a certain extent, the catalyst generally has the disadvantages of low sulfur tolerance and easy deactivation during the reaction process.

Method used

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  • Sulfur tolerant catalyst suitable for slurry bed methanation, its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Carrier pretreatment: 40-60 mesh, specific surface area is 100m 2 / g γ-Al 2 o 3 Calcination at 400°C for 2h; impregnation: at 20°C, stirring speed 60r / min, catalyst composition according to Ni:Mo:γ-Al 2 o 3 The mass percentage of 20%: 15%: 65% preparation. 9.908g of Ni(NO 3 ) 2 ·6H 2 O and 5.816g of Mo(NO 3 ) 3 ·5H 2 O was dissolved in 10ml of water to make a mixed solution, and 6.5g of the calcined carrier γ-Al 2 o 3 Add the above solution to impregnate and stir for 12h, continue to stand for 4h, and then solvent to a viscous solution at 50°C.

[0030] ·Drying and roasting: put the impregnated sample into an oven and dry at 70°C for 12h, grind the dried powder and place it in a muffle furnace and roast at 350°C for 6h to obtain NiO-Mo 2 o 3 / γ-Al 2 o 3 Prebody;

[0031] Hydrogen reduction: NiO-Mo 2 o 3 / γ-Al 2 o 3 The precursor body is ground to 40-60 mesh, and the volume composition is 5%H 2 with 95%N 2 , in a mixed atmosphere with a flow rate of...

Embodiment 2

[0034] Carrier pretreatment: 60-80 mesh, specific surface area is 150m 2 / g SiO 2 Roast at 450°C for 3h;

[0035] Impregnation: at 25°C, stirring speed 30r / min, catalyst composition according to Ce:W:SiO 2 The mass percentage of 10%: 15%: 75% preparation. 3.099g of Ce(NO 3 ) 3 ·6H 2 O and 3.752g of W(NO 3 ) 3 ·5H 2 O was dissolved in 15ml water to make a mixed solution, and 7.5g of the calcined carrier SiO 2 Add the above solution to impregnate and stir for 6h, continue to stand for 12h, and then solvent to a viscous solution at 70°C.

[0036] ·Drying and calcination: put the impregnated sample in an oven and dry at 90°C for 12h, grind the dried powder and place it in a muffle furnace and bake at 400°C for 6h to obtain Ce-W / SiO 2 Prebody.

[0037] Hydrogen reduction: Ce-W / SiO 2 The precursor body is ground to 60-80 mesh, and the volume composition is 10%H 2 with 90%N 2 , in a mixed atmosphere with a flow rate of 110mL / min, using two-stage temperature programming ...

Embodiment 3

[0040] Carrier pretreatment: 80-100 mesh, specific surface area is 200m 2 / g of MgO was roasted at 450°C for 6h;

[0041] Impregnation: at 30°C, the stirring speed is 300r / min, and the catalyst composition is prepared according to the mass percentage of Fe:V:MgO: 2%:0.5%:97.5%. 1.447g of Fe(NO 3 ) 3 9H 2 O and 0.115 g NH 4 VO 3 Dissolve in 20ml of water to make a mixed solution, add 9.75g of roasted carrier MgO into the above solution to impregnate and stir for 36h, continue to stand for 1h, and then solvent to a viscous solution at 80°C.

[0042] ·Drying and roasting: put the impregnated sample in an oven and dry at 100°C for 20h, grind the dried powder and put it in a muffle furnace and roast at 450°C for 6h to obtain the Fe-V / MgO precursor.

[0043] Hydrogen reduction: Grind the Fe-V / MgO precursor to 80-100 mesh, and the volume composition is 15%H 2 with 85%N 2 , in a mixed atmosphere with a flow rate of 130mL / min, using two-stage temperature programming control, th...

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Abstract

The invention relates to a sulfur tolerant catalyst suitable for slurry bed methanation. The catalyst adopts the main metal W as an active component, and on the basis the assistant metal W1 is added as an auxiliary agent, and the catalyst carrier is M. The catalyst is composed of, by mass: 2-40% of W, 0.5-35% of W1, and 50-97.5% of the carrier M. The sulfur tolerant catalyst provided in the invention has the advantages of high catalytic activity, long service life and high selectivity.

Description

technical field [0001] The invention belongs to a catalyst for synthesizing methane, its preparation method and application, in particular to a sulfur-resistant catalyst suitable for slurry bed methanation, its preparation method and application. Background technique [0002] Coal, oil and natural gas are the three pillars of the world's energy structure. At present, in the world's energy consumption structure, coal and oil each account for 40%, and natural gas accounts for 20%. However, the proportion of natural gas in my country's energy consumption structure is less than 5%, far below the world average. Natural gas is an important fuel and chemical intermediate, which can be used in the synthesis of various compounds such as ethylene, acetylene, and carbon black. The basic characteristics of my country's energy are "rich in coal, short of oil, and low in gas", and natural gas is a clean and efficient energy product. With the rapid development of society and economy, th...

Claims

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Application Information

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IPC IPC(8): B01J23/883B01J23/30B01J23/847B01J23/28B01J23/86B01J23/887C10L3/08
Inventor 曹会博张庆庚崔晓曦李忠李晓史郭晓
Owner SEDIN ENG
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