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Cu-Mn-Zr compound catalyst for catalyzing degradation of VOCs (Volatile Organic Compounds) waste gas and preparation method thereof

A composite catalyst and composite oxide technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problem of unmentioned catalytic degradation temperature, etc. The effect of the application foreground

Active Publication Date: 2018-03-06
JIANGSU JIAYU SPECIAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no relevant literature report on the preparation of Cu-Mn-Zr composite catalyst by sol-gel method for the degradation of ethyl acetate waste gas.
[0005] The Chinese patent document with the publication number CN104841456A discloses a catalyst preparation method for promoting the conversion of ethyl acetate in chemical waste gas. A certain proportion of diatomaceous earth and magnesium aluminum hydrotalcite is used as a carrier, and a certain proportion of copper and nickel , Rhodium metal oxide is used as the active component to realize the conversion of ethyl acetate into carbon dioxide and water. Under the action of the catalyst, the concentration of ethyl acetate is changed from 1.4mg / m 3 Reduced to 0.1mg / m 3 , the best treatment effect on the removal rate of ethyl acetate can reach 92.8%, without mentioning the catalytic degradation temperature

Method used

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  • Cu-Mn-Zr compound catalyst for catalyzing degradation of VOCs (Volatile Organic Compounds) waste gas and preparation method thereof
  • Cu-Mn-Zr compound catalyst for catalyzing degradation of VOCs (Volatile Organic Compounds) waste gas and preparation method thereof
  • Cu-Mn-Zr compound catalyst for catalyzing degradation of VOCs (Volatile Organic Compounds) waste gas and preparation method thereof

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Effect test

Embodiment 1

[0037] The preparation method of the Cu-Mn-Zr composite catalyst for degrading VOCs waste gas of the present embodiment comprises the following steps:

[0038] (1) Prepare copper nitrate, manganese nitrate and zirconium nitrate into 0.5mol / L alcohol solution. Take 40mL of the three alcohol solutions, mix them, and stir them ultrasonically for 5min;

[0039] (2) The mixed metal alcohol solution obtained in step (1) is heated to 80°C at a heating rate of 3°C / min at 25°C, and 25mL of ethanol solution with a volume fraction of 5% is slowly added under continuous stirring conditions, completely Stop stirring after adding, and form a sol after a few seconds;

[0040] (3) Keep the sol obtained in step (2) at 80° C. for 2 hours, and then age at 25° C. for 14 hours to form a gel.

[0041] (4) Heat the gel obtained in step (3) at 80°C for 3h, then at 100°C for 3h, remove ethanol and water that did not form a gel, then dry at 110°C for 4h, grind it and put it in a horse Cu-Mn-Zr (mola...

Embodiment 2

[0043] The preparation method of the Cu-Mn-Zr composite catalyst for degrading VOCs waste gas of the present embodiment comprises the following steps:

[0044] (1) Prepare copper nitrate, manganese nitrate and zirconium nitrate into 0.5mol / L alcohol solution. Take 30mL, 30mL, and 60mL of the three alcohol solutions, mix them, and stir them ultrasonically for 5 minutes;

[0045] (2) The mixed metal alcohol solution obtained in step (1) is heated to 80°C at a heating rate of 3°C / min at 25°C, and 25mL of ethanol solution with a volume fraction of 5% is slowly added under continuous stirring conditions, completely Stop stirring after adding, and form a sol after a few seconds;

[0046] (3) Keep the sol obtained in step (2) at 80° C. for 2 hours, and then age at 25° C. for 14 hours to form a gel.

[0047] (4) Heat the gel obtained in step (3) at 80°C for 3h, then at 100°C for 3h, remove ethanol and water that did not form a gel, then dry at 110°C for 4h, grind it and put it in a ...

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Abstract

The invention discloses a Cu-Mn-Zr compound catalyst for catalyzing degradation of waste gas. A Cu-Mn-Zr composite oxide is prepared through a sol-gel method, wherein the ratio of Cu to Mn to Zr is equal to (0.5 to 2) to (0.5 to 2) to (1 to 2). The invention further discloses a preparation method and application of the Cu-Mn-Zr compound catalyst for catalyzing degradation of the waste gas. The Cu-Mn-Zr compound catalyst can catalyze burning and degradation of ester organic matters, and is lower than most industrially-used catalysts in temperature; a catalyst being most suitable for lower-temperature catalytic combustion is obtained through different ratios of Cu to Mn to Zr; the catalyst has very great application value and a wide application prospect in practical production.

Description

technical field [0001] The invention relates to the field of catalysts for VOCs waste gas treatment, in particular to a Cu-Mn-Zr composite catalyst for degrading VOCs waste gas and a preparation method. Background technique [0002] According to the definition of the World Health Organization (WHO, 1989), volatile organic compounds (Volatile Organic Compounds, VOCs) refer to the boiling point range between 50 and 260 ° C, the saturated vapor pressure at room temperature exceeds 133.32 Pa, and exist in the form of vapor at room temperature A class of organic compounds in the air. According to the chemical structure of volatile organic compounds, they can be further divided into 8 categories: alkanes, aromatics, alkenes, halocarbons, esters, aldehydes, ketones and other compounds. Aromatic hydrocarbons are a class of VOCs, which mainly come from industrial production processes and fuel combustion processes, such as steel production processes, coking processes, architectural c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/72B01D53/44
CPCB01D53/8668B01D53/8687B01D2257/708B01J23/002B01J23/8892B01J2523/00B01J2523/17B01J2523/48B01J2523/72
Inventor 李济吾张菊茹
Owner JIANGSU JIAYU SPECIAL EQUIP CO LTD