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Carbon-coated transition metal oxide catalyst and preparation method and application of catalyst

A transition metal and catalyst technology, which is applied in the field of carbon-coated transition metal oxide catalysts and their preparation, can solve the problems of low activity, high price, and limit the large-scale application of precious metal catalysts, and achieves reduced air pollution, excellent activity, The effect of good industrial application prospects

Pending 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 transition metal oxide catalyst and preparation method and application of catalyst
  • Carbon-coated transition metal oxide catalyst and preparation method and application of catalyst
  • Carbon-coated transition metal oxide catalyst and preparation method and application of catalyst

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preparation example Construction

[0071] The present invention also provides a preparation method for the aforementioned catalyst, comprising the following steps: providing a carbon-coated transition metal nanocomposite; performing oxygen treatment on the carbon-coated transition metal nanocomposite to obtain a carbon-coated transition metal oxide nanocomposite Composite material; the nanocomposite material of carbon-coated transition metal oxide is molded to obtain a catalyst.

[0072] The preparation process of the catalyst is described in detail below.

[0073] First, a carbon-coated transition metal nanocomposite is provided. The carbon-coated transition metal nanocomposite material can be prepared by existing methods, and can also be purchased from the market. Preferably adopt the following method to prepare:

[0074] Mix the transition metal-containing compound and carboxylic acid in a solvent to form a homogeneous solution; remove the solvent in the homogeneous solution to obtain a precursor; and pyro...

Embodiment 1

[0121] This embodiment is used to illustrate the preparation method of catalyst of the present invention

[0122] (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.

[0123] (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. Raise the temperature to 600° C., stop heating after keeping the temperature for 2 hours, and cool to room temperature under a nitrogen atmosphere to obtain a black solid.

[0124] (3) the product obtained in step (2) is placed in a porcelain boat, and then the porcelain boat is placed in the constant temperature zone of the tube furnace, and the standard gas (the volume fraction of oxygen...

Embodiment 2

[0130] This embodiment is used to illustrate the preparation method of catalyst of the present invention

[0131] (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.

[0132] (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 nitrogen gas with a flow rate of 100mL / min, and set the temperature at a rate of 2°C / min. Raise the temperature to 650° C., stop heating after keeping the temperature for 2 hours, and cool to room temperature under a nitrogen atmosphere to obtain a black solid.

[0133] (3) the product obtained in step (2) is placed in a porcelain boat, and then the porcelain boat is placed in the constant temperature zone of the tube furnace, and the standard gas (the volume fraction of oxyge...

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Abstract

The invention provides a carbon-coated transition metal oxide catalyst and a preparation method and application thereof, the catalyst comprises a carrier and an active component loaded on the carrier, the active component is a graphite carbon-coated transition metal oxide nano composite material, the transition metal oxide is selected from one or more of VIII group oxide, VIB group oxide, IB group oxide and IIB group oxide. According to the invention, the nano composite material of the graphite carbon coated transition metal oxide is used as an active component and is loaded on the carrier through a specific process, so that the obtained catalyst not only has higher catalytic activity, but also has certain mechanical strength, is not easy to crack and pulverize in the reaction process, can meet the requirements of actual industrial production, and has good application prospects.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a carbon-coated transition metal oxide catalyst and its preparation method and application. 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 transition metal oxides with carbon materials can 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 transition metal oxide nanomaterials have shown good application prospects in the fields of electrocatalysis, supercapacitor materials, lithium-ion battery anode materials, and bioengineering. [0003] Generally, carbon-coated nanoma...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J37/02B01J35/10B01J37/14B01J37/06B82Y30/00B82Y40/00B01D53/86B01D53/56
CPCB01J23/755B01J37/0215B01J37/14B01J37/0201B01J37/06B82Y30/00B82Y40/00B01D53/8628B01D2257/402B01J35/23B01J35/613B01J35/615B01J35/633B01J35/647Y02C20/10
Inventor 徐国标荣峻峰于鹏谢婧新宗明生吴耿煌林伟国
Owner CHINA PETROLEUM & CHEM CORP
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