Unlock instant, AI-driven research and patent intelligence for your innovation.

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

A transition metal and catalyst technology, applied in the field of carbon-coated transition metal oxide catalyst and its preparation, can solve the problems of limiting the large-scale application of noble metal catalysts, low activity, high price, etc., and achieve good industrial application prospects and performance improvement , the effect of performance improvement

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 3 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Carbon-coated transition metal oxide catalyst and preparation method and application thereof
  • Carbon-coated transition metal oxide catalyst and preparation method and application thereof
  • Carbon-coated transition metal oxide catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0070] The present invention also provides a preparation method for the aforementioned catalyst, comprising the following steps: providing a carbon-coated transition metal nanocomposite material; performing oxygen treatment on the carbon-coated transition metal nanocomposite material; using the oxygen-treated product as a raw powder, adding a binder and mixing to obtain a wet dough, and then performing the first roasting treatment under an inert atmosphere; preparing a second metal salt solution, mixing the roasted product with the second metal salt solution and stirring to obtain a solid-liquid mixture; The solid-liquid mixture is dried, and then subjected to molding treatment; and then subjected to a second roasting treatment under an air atmosphere to obtain a catalyst.

[0071] The preparation process of the catalyst is described in detail below.

[0072] First, a carbon-coated transition metal nanocomposite is provided. The carbon-coated transition metal nanocomposite ma...

Embodiment 1

[0124] This embodiment is used to illustrate the preparation method of catalyst of the present invention

[0125] (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.

[0126] (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.

[0127] (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

[0135] This embodiment is used to illustrate the preparation method of catalyst of the present invention

[0136] (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.

[0137] (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.

[0138] (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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
particle diameteraaaaaaaaaa
loss rateaaaaaaaaaa
Login to View More

Abstract

The invention provides a carbon-coated transition metal oxide catalyst, the catalyst comprises a carrier, and an active component and an auxiliary agent loaded on the carrier, the active component is a graphite carbon-coated transition metal oxide nano composite material, and the transition metal oxide is selected from one or more of VIII group oxide, VIB group oxide, IB group oxide and IIB group oxide; the auxiliary agent is a second metal oxide, the second metal is alkali metal and / or alkaline earth metal, and the molar ratio of the second metal to the transition metal is 0.01-0.3. According to the present invention, the graphite carbon-coated transition metal oxide nanometer composite material is adopted as the active component, and the active component and the auxiliary agent are loaded on the carrier by using the specific process so that the catalyst has characteristics of high catalytic activity, high mechanical strength, excellent nitrous oxide catalytic decomposition effect, and good industrial application prospect.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/10B01J37/14B01D53/86B01D53/56
CPCB01J23/755B01J23/002B01J37/14B01D53/8628B01J2523/00B01D2257/402B01J35/615B01J35/633B01J35/647B01J2523/13B01J2523/31B01J2523/847Y02C20/10
Inventor 荣峻峰徐国标于鹏吴耿煌宗明生谢婧新林伟国
Owner CHINA PETROLEUM & CHEM CORP