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Carbon-coated nickel oxide catalyst and preparation method and application thereof

A carbon-coated nickel and catalyst technology, which is applied in the field of carbon-coated nickel oxide catalysts and its preparation, can solve the problems of high price, low activity, and restrictions on the large-scale application of noble metal catalysts, so as to improve catalytic performance and reduce air pollution , the effect of good industrial application prospects

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metal catalysts (such as Rh and Ru) have high low-temperature catalytic activity for N2O catalytic decomposition (250℃~350℃ range, can efficiently decompose N2O) , but the high price limits the large-scale application of noble metal catalysts
The price of molecular sieve catalysts and transition metal oxide catalysts is significantly lower than that of noble metals, but the activity of these two types of catalysts for the catalytic decomposition of N2O is relatively low, and the temperature range for efficient decomposition is 450°C to 550°C. ℃

Method used

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  • Carbon-coated nickel oxide catalyst and preparation method and application thereof
  • Carbon-coated nickel oxide catalyst and preparation method and application thereof
  • Carbon-coated nickel oxide catalyst and preparation method and application thereof

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Experimental program
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preparation example Construction

[0049] figure 1 It is a process flow diagram for the preparation of a catalyst of carbon-coated nickel oxide in an embodiment of the present invention; as figure 1 As shown, the present invention provides a method for preparing a carbon-coated nickel oxide catalyst, comprising the following steps: providing a carbon-coated nickel nanocomposite as a raw powder, adding a binder to the raw powder and mixing to obtain a wet Dough; the wet dough is dried and subjected to a first calcination treatment in an inert atmosphere; the product after the first calcination treatment is subjected to a molding treatment; and the product after the molding treatment is subjected to a second calcination treatment in air, A carbon-coated nickel oxide catalyst is obtained.

[0050] First, a carbon-coated nickel nanocomposite is provided. The nanocomposite material of this carbon-coated nickel can be bought from commercially, also can adopt following method to prepare:

[0051] The nickel source ...

Embodiment 1

[0090] This embodiment is used to illustrate the preparation method of catalyst of the present invention

[0091] (1) Weigh 10 g of nickel carbonate and 10 g of citric acid into a beaker containing 100 mL of deionized water, stir at 70° C. to obtain a homogeneous solution, and continue heating and evaporating to dryness to obtain a solid precursor.

[0092] (2) Place the solid precursor obtained in step (1) in a porcelain boat, then place the porcelain boat in the constant temperature zone of the tube furnace, feed in nitrogen gas with a flow rate of 100mL / min, and heat at a rate of 4°C / min. The temperature was raised to 600° C., and the heating was stopped after keeping the temperature for 2 hours, and cooled to room temperature under a nitrogen atmosphere to obtain a carbon-coated nickel nanocomposite material. According to elemental analysis, the mass percentages of elements contained in the carbon-coated nickel nanocomposite material are: carbon 26.14%, hydrogen 0.42%, oxy...

Embodiment 2

[0100] (1) Weigh 10g of nickel acetate and 10g of citric acid into a beaker containing 100mL of deionized water, stir at 70°C to obtain a homogeneous solution, continue heating and evaporate to dryness, and obtain a solid precursor.

[0101] (2) Place the solid precursor obtained in step (1) in a porcelain boat, then place the porcelain boat in the constant temperature zone of the tube furnace, feed in nitrogen gas with a flow rate of 100mL / min, and heat at a rate of 2°C / min. Raise the temperature to 650° C., stop the heating after 2 hours of constant temperature, and cool to room temperature under a nitrogen atmosphere to obtain a carbon-coated nickel nanocomposite material. According to elemental analysis, the mass percentages of elements contained in the carbon-coated nickel nanocomposite are: carbon 24.29%, hydrogen 0.47%, oxygen 0.96%, nickel 74.28%.

[0102] From Figure 4 It can be seen that the nickel in this material is present in a reduced state. Figure 5 It is a ...

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Abstract

The invention provides a carbon-coated nickel oxide catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: providing a carbon-coated nickel nano composite material as raw powder, adding a binder into the raw powder, and mixing to obtain a wet material block; drying the wet material block, and then carrying out first roasting treatment in an inert atmosphere; carrying out forming treatment on a product subjected to the first roasting treatment; and carrying out second roasting treatment on the molded product in the air to obtain the carbon-coated nickel oxide catalyst. The carbon-coated nickel nano composite material is used as raw powder and is processed by adopting a specific process, so that the specific surface, pore volume and pore diameter of the catalyst can be adjusted, the carbon-coated nickel oxide catalyst with a unique structure and composition is obtained, and the carbon-coated nickel oxide catalyst has excellent catalytic activity and good mechanical properties, can meet the industrial application requirements, the catalyst has a better effect on catalytic decomposition of nitrous oxide, and has a good industrial application prospect.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a carbon-coated nickel oxide catalyst, a preparation method and application thereof. Background technique [0002] Transition metal oxides have excellent catalytic properties and photoelectromagnetic properties, and are research hotspots in the field of inorganic materials. Carbon materials have good electrical conductivity, good chemical / electrochemical stability, and high structural strength. Coating the nanoparticles of active metals or metal oxides with carbon materials can effectively improve the conductivity and stability of the nanomaterials, and have a limited effect on the nanoparticles so that they are not easy to agglomerate. In recent years, carbon-coated metal nanomaterials have not only been widely used in the fields of electrocatalysis, supercapacitor materials, lithium-ion battery anode materials, and bioengineering, but also show good application prospects in the field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/10B01J37/08B82Y30/00B82Y40/00B01D53/86B01D53/56
CPCB01J23/755B01J37/082B82Y30/00B82Y40/00B01D53/8628B01D53/86B01D53/56B01J35/23B01J35/613B01J35/633B01J35/647B01J35/615Y02C20/10
Inventor 荣峻峰于鹏徐国标纪洪波宗明生吴耿煌谢婧新林伟国
Owner CHINA PETROLEUM & CHEM CORP