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Preparation method and application of copper-cobalt composite oxide catalyst

A composite oxide and catalyst technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Density and other problems, to achieve the effect of good catalytic combustion activity of toluene volatile organic compounds, large reaction interface, and good catalytic combustion activity

Inactive Publication Date: 2020-04-10
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The metal oxide components prepared by conventional methods have disadvantages such as low active component content and compact structure, which greatly affect the catalytic performance of the catalyst.

Method used

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  • Preparation method and application of copper-cobalt composite oxide catalyst
  • Preparation method and application of copper-cobalt composite oxide catalyst
  • Preparation method and application of copper-cobalt composite oxide catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the copper-cobalt composite oxide catalyst of the present embodiment is:

[0032] S1, by copper nitrate: cobalt nitrate: the mol ratio of oxalic acid is 1:2:3, carry out mixing and grinding into dry matter;

[0033] S2. Roast the dry material in S1. The roasting condition is to raise the temperature to 450°C at a heating rate of 10°C / min, and then roast at a constant temperature of 450°C for 2 hours. After the end, after the temperature drops to normal temperature, take it out, Instantly.

Embodiment 2

[0035] This example studies the influence of the proportion of oxalic acid on the performance of the catalyst. In this example, except that the molar ratio of copper nitrate: cobalt nitrate: oxalic acid is replaced by 1:2:0, 1:2:1 and 1:2:5, the rest are the same as in Example 1.

[0036] The prepared copper-cobalt composite oxide catalyst is marked as Cu-Co-0, Cu-Co-1 and Cu-Co-5 respectively with the content of oxalic acid, and the copper-cobalt composite oxide catalyst prepared in Example 1 is marked as Cu-Co-3.

[0037] The copper-cobalt composite oxide catalysts in Example 1 and Example 2 were used in the catalytic combustion of toluene to evaluate the activity of the catalyst. The activity evaluation of the catalyst was carried out in a micro-tubular fixed-bed reactor with an inner diameter of 8 mm under normal pressure, and a thermocouple was built in the reactor, and the reaction temperature was determined by -708P-type temperature program temperature controller con...

Embodiment 3

[0052] This example studies the effect of calcination temperature on catalyst performance. In this example, except that the calcination temperature is replaced by 300° C., 350° C. and 550° C., the rest are the same as in Example 1. The prepared copper-cobalt composite oxide catalyst is marked as 300-Cu-Co, 350-Cu-Co and 550-Cu-Co with the reaction temperature respectively, and the copper-cobalt composite oxide catalyst prepared in Example 1 is marked as 450- Cu-Co.

[0053] Catalysts are respectively used for the catalytic combustion of toluene, and the activity evaluation of catalyst is carried out, and the activity evaluation method is the same as embodiment 2. The conversion rate results of the toluene catalytic combustion of the copper-cobalt composite oxide catalyst obtained by the catalyst activity evaluation experiment are shown in Table 2:

[0054] Table 2 Effect of calcination temperature on the catalytic combustion performance of catalyst toluene

[0055]

[00...

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Abstract

The invention discloses a preparation method and application of a copper-cobalt composite oxide catalyst, belonging to the technical field of preparation of composite catalysts. The preparation methodcomprises the following steps: mixing and grinding a copper salt, a cobalt salt and a complexing agent to form a dry material; and roasting the dry material under the roasting condition that a temperature is raised to 300-550 DEG C at a heating rate of 10 DEG C / min, then performing roasting for 1-2 hours at a constant temperature of 300-550 DEG C, and taking out the dry material after the temperature drops to a normal temperature after roasting is finished so as to obtain the catalyst, wherein a molar ratio of the copper salt to the cobalt salt to the complexing agent is 1: 2: (0-5), and thecomplexing agent is oxalic acid. The copper-cobalt composite oxide catalyst prepared by the method disclosed by the invention shows good activity in catalytic combustion of toluene volatile organic compounds at low temperature. According to the method, the copper-cobalt composite oxide catalyst is prepared through a grinding method, so preparation process is simple, conditions are mild and are easy to control, safety and environmental protection are achieved, repeatability is good, and great industrial application value is achieved.

Description

technical field [0001] The invention belongs to the technical field of composite catalyst preparation, and in particular relates to a preparation method and application of a copper-cobalt composite oxide catalyst. Background technique [0002] Atmospheric environment is closely related to human survival, and air pollution will seriously threaten human survival. Volatile Organic Compounds (Volatile Organic Compounds, VOCs) are an important part of air pollution. There are many types of VOCs and complex components, which not only seriously endanger human health, but also have a great impact on the environment. Toluene volatile organic compounds are one of the VOCs , has received extensive attention because of its great harm to human health and the environment. [0003] As an additive and an important chemical raw material, toluene is widely used in petrochemical, dyestuff, medicine, pesticide, explosives, spices and other industries. During the production process of these ind...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J37/08B01D53/86B01D53/72F23G7/07
CPCB01J23/002B01J23/75B01J37/082B01D53/8668F23G7/07B01D2257/708F23G2202/60
Inventor 谢红梅曾嘉程夏宾周桂林
Owner CHONGQING TECH & BUSINESS UNIV
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