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An efficient catalyst for catalytic incineration of VOC waste gas and a preparing method thereof

A technology of catalytic incineration and catalyst, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, combustion method, etc., can solve the problems of easy blockage and poisoning, high catalyst cost, prevent loss from falling off, good catalytic effect, and difficult to block. Effect

Inactive Publication Date: 2018-11-30
ZHEJIANG QICAI ECO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the defects of high catalyst cost and easy plugging and poisoning in the prior art

Method used

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  • An efficient catalyst for catalytic incineration of VOC waste gas and a preparing method thereof
  • An efficient catalyst for catalytic incineration of VOC waste gas and a preparing method thereof
  • An efficient catalyst for catalytic incineration of VOC waste gas and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0031] The following method is used to prepare a high-efficiency catalyst for VOCs exhaust gas catalytic incineration:

[0032] Stir the active metal salt solution evenly according to a certain proportion to obtain a mixed solution, then add an appropriate amount of activated carbon and continue to stir for 2 to 6 hours, then add activated alumina and ceria powder as catalyst carriers and stir overnight, and finally stir and dry at a constant temperature to obtain a mixture Powder; the active metal is a mixture of copper, manganese, cobalt and antimony; active material mass ratio MnO:CuO:Co 3 o 4 :Sb 2 o 3 =(6~2):(1~5):(1~2):(2~1).

[0033] Mix the dry mixture powder, pore-forming agent starch, and polyethylene glycol into a ball mill and mill for 6 hours, then add adhesive silica sol and gum, mix evenly, and extrude into strips to obtain a catalyst precursor;

[0034] The catalyst precursor is calcined, the calcining temperature is 550°C, and the calcining time is 4h.

...

Embodiment 10

[0041] The catalysts prepared in Examples 1-9 were used for catalytic incineration experiments on incineration gas containing propylene and chloroform.

[0042] This catalytic combustion experiment condition is: light-off temperature 280 ℃-350 ℃ (embodiment 1,4,7 light-off temperature is 300 ℃, embodiment 2,5,8 light-off temperature is 280 ℃, embodiment 3,6, 9 The light-off temperature is 350°C), and the intake air concentration is 2000mg / m 3 , control the reaction space velocity to 8000h -1 , using Shimadzu 2014C gas chromatography to analyze the exhaust gas treatment ability of the catalyst on-line. The results are listed in Table 1.

[0043] As can be seen from Table 1, MnO:CuO:Co 3 o 4 :Sb 2 o 3 =4:3:1:2, ceria:activated alumina=1:1, the catalytic incineration effect is the best, the removal rate of propylene can reach more than 99%, and the removal rate of chloroform can reach more than 96%.

Embodiment 11

[0045] Using the same catalytic incineration experimental conditions as in Example 10, the active component mass ratio of the selected catalyst is MnO:CuO:Co 3 o 4 :Sb 2 o 3 =4:3:1:2; alumina: ceria = 1:1, treating methanol, benzene, toluene, xylene, aniline, acrolein, acrylonitrile and other organic pollutant gases, the treatment results are shown in Table 2.

[0046] As can be seen from Table 2, the catalyst produced by the present invention has a good removal rate for various volatile organic pollutants and has wide applicability.

[0047] Table 2 Catalytic combustion experiment results of various volatile organic pollutants

[0048]

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Abstract

An efficient catalyst for catalytic incineration of VOC waste gas and a preparing method thereof are disclosed. The method includes (1) fully stirring active metal salt solutions according to a certain ratio to obtain a mixture solution, then adding a proper amount of activated carbon, stirring the mixture for 2-6 h, then adding activated alumina and cerium dioxide powder as a catalyst carrier, stirring the mixture overnight, and finally stirring and drying the mixture at a constant temperature to obtain mixture powder, with the active metals being two or more selected from copper, manganese,cobalt, antimony and lanthanum; (2) mixing the dried mixture powder and a pore forming agent, adding the mixture into a ball mill, performing ball milling for 4-8 h, then adding a binder, fully mixingthe materials, and performing extrusion molding to obtain a catalyst precursor; and (3) roasting the catalyst precursor at 350-750 DEG C for 2-6 h. The method is simple in process and low in energy consumption, and the obtained catalyst is low in cost, high in poisoning resistance, wide in applicability, free of secondary pollution, long in service lifetime and high in catalysis efficiency.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a high-efficiency catalyst for catalytic combustion of VOCs waste gas and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, the scale and variety of chemical production have expanded extremely rapidly, and chemicals have played an important role in human life. At the same time, a small number of chemicals have brought serious harm to the ecological environment and human health, especially the pollution hazard caused by volatile organic compounds (volatile organic compounds, VOCs). Volatile organic compounds (volatile organic compounds, VOCs) are a large class of organic pollutants, which refer to organic compounds with a saturated vapor pressure greater than 70.91Pa at normal temperature and a boiling point less than 260°C at normal pressure. VOCs mainly include hydrocarbons, oxygen hydrocarbons, halog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/08F23G7/07
CPCB01J23/002B01J23/8892B01J37/0018B01J2523/00F23G7/07B01J2523/17B01J2523/53B01J2523/72B01J2523/845B01J2523/31B01J2523/3712
Inventor 江海云陶海祥钱枞诚吴晓瑶
Owner ZHEJIANG QICAI ECO TECH CO LTD
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