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Metal oxide catalyst applied to catalytic combustion of VOCs as well as preparation method and application of metal oxide catalyst

A catalytic combustion and oxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, combustion method, physical/chemical process catalyst, etc., can solve the problems of low activity, low catalyst activity, low catalytic activity, etc. Achieve high activity, high cycle stability, and good stability

Active Publication Date: 2021-12-14
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalytic activity of cobalt metal oxide catalysts in the catalytic combustion of VOCs is still relatively low
Chinese patent CN107952441A discloses a method for preparing a propane catalytic combustion composite oxide catalyst and its application, using citric acid complexation to prepare a CoCeOx-70 composite oxide catalyst for propane catalytic combustion , which is simple to operate and has good catalyst stability, but low activity
Therefore, there is an urgent need to provide a simple and quick catalyst for the catalytic combustion of VOCs and its preparation method to solve the problem of low activity of the existing catalysts for the catalytic combustion of VOCs

Method used

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  • Metal oxide catalyst applied to catalytic combustion of VOCs as well as preparation method and application of metal oxide catalyst
  • Metal oxide catalyst applied to catalytic combustion of VOCs as well as preparation method and application of metal oxide catalyst
  • Metal oxide catalyst applied to catalytic combustion of VOCs as well as preparation method and application of metal oxide catalyst

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Effect test

Embodiment 1

[0030] Embodiment 1: Mg-Co prepared by the present invention 3 o 4 -The preparation method of Ac catalyst

[0031] a. 5.821g cobalt nitrate (0.02mol) Co(NO 3 ) 3 ·6H 2 O and 0.256g magnesium nitrate (0.001mol) Mg(NO 3 ) 2 ·6H 2 O was dissolved in 60 mL of deionized water to form solution A, and 6.619 g of citric acid was dissolved in 20 mL of deionized water to form solution B. Solution A was mixed with solution B, and after magnetic stirring at 60°C for 1 hour, rotary evaporation at 50°C gave a gel-like substance; the obtained substance was dried at 110°C for 12 hours. Grind the dried powder and bake it in a tube furnace at 400°C for 3 hours under air condition to obtain Mg-Co 3 o 4 oxide.

[0032] b. the Mg-Co obtained in the above step a 3 o 4 Disperse 0.5 g of the oxide in 100 mL of 0.1 mol / L, PH ≈ 3 acetic acid solution, and stir magnetically at 60 ° C for 1 hour. Then the above suspension was filtered and washed with deionized water until the filtrate was ne...

Embodiment 2

[0033] Embodiment 2: Condition is the same as embodiment 1, alkaline earth metal salt magnesium nitrate is changed into calcium nitrate.

Embodiment 3

[0034] Embodiment 3: condition is the same as embodiment 1, alkaline earth metal salt magnesium nitrate is changed into strontium nitrate.

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Abstract

The invention belongs to the technical field of catalytic combustion of VOCs for environment protection, and provides a metal oxide catalyst applied to catalytic combustion of VOCs and a preparation method and application of the metal oxide catalyst. The metal oxide catalyst provided by the invention is prepared by taking Co3O4 as an active component, adding alkaline earth metal with a molar ratio of 1-10%, and then carrying out etching and washing with an acid solution, wherein the pH value of the acid solution is 2-4. According to the preparation method, the catalytic activity of the metal oxide catalyst in catalytic combustion of VOCs can be remarkably improved, and the catalyst prepared through the method is high in activity, low in initiation temperature, good in hydrothermal stability and low in cost compared with a noble metal catalyst, so the catalyst has good application prospects in the aspect of purification of industrial waste gas.

Description

technical field [0001] The invention belongs to the technical field of VOCs catalytic combustion environmental protection, in particular to a metal oxide catalyst applied to VOCs catalytic combustion and its preparation method and application. Background technique [0002] Volatile organic compounds (VOCs) are important precursors for the formation of atmospheric composite pollutants such as PM2.5, ozone, and photochemical smog, and their emissions cause serious harm to the natural environment and human health. In recent years, my country's environmental pollution has been brought under control to a certain extent, but atmospheric compound pollution such as smog and ozone is still relatively serious and showing an upward trend. Among the technical means for VOCs removal, catalytic combustion technology is one of the VOCs treatment technologies with the most research and development value and application prospects. It has the advantages of simple operation, low energy consump...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J23/78F23G7/07
CPCB01J23/002B01J23/78F23G7/07F23G2209/14Y02A50/20
Inventor 梁长海朱文军陈霄李闯李瑶
Owner DALIAN UNIV OF TECH
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