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Catalyst for catalytic combustion of methane and preparation method thereof

A methane catalytic combustion and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of non-precious metal catalyst activity and stability to be improved , to achieve the effect of maintaining catalytic performance, good dispersion and improving activity

Active Publication Date: 2022-05-17
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activity and stability of existing non-precious metal catalysts need to be improved

Method used

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  • Catalyst for catalytic combustion of methane and preparation method thereof
  • Catalyst for catalytic combustion of methane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Measure 400mL of cyclohexane, 120mL of 1-hexanol, and 100mL of NP-10 in a 1000mL beaker, turn on the mechanical stirring at 350r / min for 30min, prepare the microemulsion and divide it into two parts after stirring; weigh 3.4320g of zirconium nitrate , 3.4729g of cerium nitrate, dissolved in deionized water and diluted to 50mL, poured into a part of the emulsion, and continued to stir for 15 minutes to obtain a microemulsion; take 5mL of ammonia water and dilute to 50mL, add it to another part of the emulsion, and stir for 15 minutes; Mix two parts of emulsion, keep stirring at a speed of 350r / min for 1 hour, and then let it stand for 3 hours; put the standing emulsion in a water bath at 60°C, stir vigorously at 400r / min for 30 minutes; take it out, cool and age overnight; add After stirring with 200mL ethanol for 30min, filter directly with suction, wash with deionized water several times during this period, and finally wash with ethanol; put the filter cake in a vacuum ...

Embodiment 2

[0026] The difference between this example and Example 1 is that in this example, the active component impregnating solution is first added to the mixed nitrate aqueous solution, and then the two emulsions are mixed, and the carrier is prepared by a one-step microemulsion method.

[0027] Measure 400mL of cyclohexane, 120mL of 1-hexanol, and 100mL of NP-10 in a 1000mL beaker, turn on the mechanical stirring at 350r / min for 30min, prepare the microemulsion and divide it into two parts after stirring; weigh 6.8702g of zirconium nitrate Dissolve 1.1668g of cobalt nitrate in deionized water and dilute to 50mL, pour into one emulsion and continue to stir for 15min; take 5.90mL of ammonia water and dilute to 50mL, pour it into another emulsion, and stir for 15min; mix the two emulsions , keep stirring at a speed of 350r / min for 1 hour, then let it stand for 3 hours; put the emulsion after standing in a water bath at 60°C, stir vigorously at 400r / min for 30 minutes; take it out, cool ...

Embodiment 3

[0029] Measure 400mL cyclohexane, 120mL 1-hexanol, and 100mL NP-10 in a 1000mL beaker, turn on mechanical stirring at 350r / min for 30min, and divide into two parts after stirring; weigh 3.4344g of zirconium nitrate, cerium nitrate 3.4720g, 1.1640g of cobalt nitrate was dissolved in deionized water and diluted to 50mL, poured into a prepared emulsion, and continued to stir for 15min; took 6.24mL of ammonia water and diluted to 50mL, poured it into another emulsion, stirred 15min; the two emulsions were mixed and continued to react for 1 hour, and then stood still for 3 hours; put the standing emulsion in a water bath at 60°C, and vigorously stirred at 400r / min for 30 minutes; took it out, cooled it and aged it overnight; sucked out the supernatant, added After stirring with 200mL ethanol for 30min, filter directly with suction, wash with deionized water several times during this period, and finally wash with ethanol; put the filter cake in a vacuum oven at 40°C for drying, then ...

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Abstract

A catalyst for catalytic combustion of methane and a preparation method thereof. The present invention dissolves the mixed nitrate aqueous solution and the precipitating agent aqueous solution respectively in the prepared microemulsion oil phase; Parts of the microemulsion are mixed dropwise, and subjected to static aging after being fully reacted by mechanical stirring; after aging, a demulsifier is added to stir and demulsify; after the demulsification is complete, the clear liquid is removed, filtered and washed several times; Dry and roast the filter cake to obtain the required carrier; put the carrier into the rotary evaporator, add the prepared active component impregnation solution, and rotate at low temperature; finally put the product into the muffle furnace, and roast the product at a programmed temperature to obtain methane Catalytic combustion catalyst. The invention largely improves the activity of the non-precious metal catalyst mainly through the method of controlling the particle size of the catalyst.

Description

technical field [0001] The invention relates to the technical field of material preparation and the field of catalytic application, and specifically relates to a catalyst for catalytic combustion of methane and a preparation method thereof. Background technique [0002] At present, the use of natural gas is still burning with open flames, and its energy utilization rate as a chemical fuel is low, and because of the high temperature generated by its combustion, it is very easy to produce toxic gas nitrogen oxides when using air as a supporting gas. [0003] Catalytic combustion can use solid catalysts to adsorb gases and undergo chemical reactions, reducing the activation energy of the reaction and reducing the reaction temperature. It can effectively prevent the formation of nitrogen oxides and reduce the energy consumption of ignition. [0004] Catalysts can be divided into unsupported and supported types in broad categories. Unsupported catalysts mainly refer to perovski...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C10L3/00C10L10/00
CPCB01J23/83C10L3/003C10L10/00C10L2290/143
Inventor 潘立卫王泽昱王娟钟和香张晶
Owner DALIAN UNIV
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