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A kind of transport bed methanation catalyst and preparation method thereof

A catalyst and bed methane technology, which is applied in the field of transport bed methanation catalyst and its preparation, can solve the problems of severe collision and friction between the catalyst and the reactor wall, high mechanical strength and wear resistance of catalyst particles, and improve the anti-deactivation ability , Improve mechanical strength and wear resistance, and prolong the effect of service life

Inactive Publication Date: 2019-08-23
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The transport bed reactor has the advantages of good heat transfer effect, uniform temperature distribution, and small diffusion resistance in the catalyst. However, the collision and friction between the catalyst and the reactor wall is severe, and the mechanical strength and wear resistance of the catalyst particles are high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The specific preparation method of the transport bed methanation catalyst in this embodiment is as follows:

[0029] 174.5gNi(NO 3 ) 2 ·6H 2 O and 100.4gMn(NO 3 ) 2 4H 2 O was added to deionized water to make a 1.7L mixed metal salt solution. 276g anhydrous Na 2 CO 3 Dissolve in deionized water to form a 1.2L solution, and heat to 70°C. Keep this temperature constant, and slowly add the above mixed metal salt solution dropwise under rapid stirring until the pH value of the resulting mixed slurry is 7. Keep the system at 70°C, continue stirring for 60 minutes, take out the slurry and filter it, wash it repeatedly with deionized water until the Na ion concentration in the filtrate is lower than 0.2%wt, and obtain the active component precursor of the catalyst.

[0030] 171.7gZr(NO 3 ) 4 ·5H 2 O and 225gAl(NO 3 ) 3 9H 2 O was added into deionized water to form a 0.6L zirconium-aluminum mixed solution, and 371g of anhydrous Na 2 CO 3 Dissolve in deionized wa...

Embodiment 2

[0033] 203gNi(NO 3 ) 2 ·6H 2 O and 75.3gMn(NO 3 ) 2 4H 2 O was added to deionized water to make a 1.5 L mixed metal salt solution. 212g anhydrous Na 2 CO 3 Dissolve in deionized water to make a 1.2L solution, and heat to 75°C. Keep this temperature constant, slowly add the above mixed metal salt solution dropwise under rapid stirring until the pH value of the resulting mixed slurry is 7.7. Keep the system at 75°C, continue to stir for 60 minutes, take out the slurry and filter it, and wash it repeatedly with deionized water until the Na in the filtrate + The ion concentration is lower than 0.2%wt, and the active component precursor of the catalyst is obtained.

[0034] 214.6gZr(NO 3 ) 4 ·5H 2 O and 187.6gAl(NO3 ) 3 9H 2 O was added into deionized water to form a 0.6L zirconium-aluminum mixed solution, and 371g of anhydrous Na 2 CO 3 Dissolve it in deionized water to make a 1.5L solution, and heat it to 75°C. Keep this temperature constant, slowly drop the zircon...

Embodiment 3

[0037] 232.7gNi(NO 3 ) 2 ·6H 2 O and 50.2gMn(NO 3 ) 2 4H 2 O was added to deionized water to make 1 L of mixed metal salt solution. 212g anhydrous Na 2 CO 3 Dissolve in deionized water to make a 1.2L solution, and heat to 65°C. Keep this temperature constant, slowly add the above mixed metal salt solution dropwise under rapid stirring until the pH value of the resulting mixed slurry is 8.5. Keep the system at 65°C, continue to stir for 60 minutes, take out the slurry and filter it, wash it repeatedly with deionized water until the Na ion concentration in the filtrate is lower than 0.2%wt, and obtain the active component precursor of the catalyst.

[0038] 300.5gZr(NO 3 ) 4 ·5H 2 O and 112.5gAl(NO 3 ) 3 9H 2 O was added into deionized water to form a 0.6L zirconium-aluminum mixed solution, and 371g of anhydrous Na 2 CO 3 Dissolve in deionized water to make a 1.5L solution, and heat it to 65°C. Keep this temperature constant, slowly drop the zirconium-aluminum mix...

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Abstract

The invention provides a transport bed methanation catalyst, which belongs to the technical field of transport bed methanation catalysts. In terms of oxide mass percentage, the catalyst includes 30wt% to 60wt% of active component precursor and 40wt% to 70wt% of binder, wherein, in terms of mole fraction of metal atoms, the active component precursor It contains 60-80 mole fraction of nickel atoms and 20-40 mole fraction of manganese atoms, and the binder is zirconium aluminum gel. The invention also provides a preparation method of the catalyst. The catalyst is spray-dried from a mixture of active component precursor and binder at 150°C to 400°C (please provide the spray drying time), and then dried at 300°C to 450°C. It is prepared by calcining at ℃ for 1 to 3 hours. The transport bed methanation catalyst of the present invention can have sufficient mechanical strength and wear resistance on the premise of maintaining high activity and high stability of the methanation catalyst, so that it can be used as a methanation catalyst for a transport bed reactor.

Description

technical field [0001] The invention belongs to the technical field of transport bed methanation catalysts, in particular to a transport bed methanation catalyst and a preparation method thereof. Background technique [0002] Natural gas has the characteristics of high efficiency, cleanliness, and convenient transmission. It is an ideal clean energy. With the acceleration of urbanization and the improvement of people's living standards, people's demand for natural gas is growing rapidly. There is a large gap between the supply and demand of natural gas. [0003] my country's energy resources are characterized by rich coal, little gas, and poor oil. Therefore, coal consumption accounts for a relatively high proportion of primary energy consumption. Due to the high energy conversion rate of coal-to-natural gas, low water consumption, and relatively simple waste disposal, it has become the most effective way to utilize coal. In order to make full use of my country's abundant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J35/08
CPCB01J23/8892B01J35/51
Inventor 曾凌云凡美婷王雪峰胡彭刘玉成谭青冯雅晨张新波许光文
Owner HAO HUA CHENGDU TECH
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