Catalyst used for purifying volatile organic compound and preparation method of catalyst

A volatile organic compound and catalyst technology, which is applied in the field of volatile organic compound purification catalyst and its preparation, can solve the problems of lengthy preparation process, high noble metal loading, and low noble metal loading, and achieve simple process, good low-temperature activity, The effect of excellent high temperature resistance

Active Publication Date: 2017-11-10
东莞中维环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing catalysts used for purifying volatile organic compounds, such as the modification is too complicated, the preparation process is lengthy, and the loading capacity of precious metals is high, resulting in high cost. Catalyst for purification of volatile organic compounds

Method used

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  • Catalyst used for purifying volatile organic compound and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Coating of modified alumina on cordierite honeycomb ceramic substrate

[0046] The mixed solution of iron salt, cobalt salt, nickel salt is mixed with the water-soluble colloid of aluminum hydroxide, and described iron salt, cobalt salt, nickel salt are Fe(NO 3 ) 3 9H2 O, Co(AC) 3 4H 2 O, Ni(NO 3 ) 4 ·6H 2 O, specifically weigh 22.5231g Fe(NO 3 ) 3 9H 2 O, 13.8872g Co(AC) 3 4H 2 O, 16.0482g Ni(NO 3 ) 4 ·6H 2 O was dissolved in 20ml of deionized water, and mixed with a colloid containing 20ml of deionized water and 65.0166g of aluminum hydroxide, and magnetically stirred; in the prepared mixed solution, the molar ratio of iron, cobalt, nickel, and aluminum was 1:1 :1:7;

[0047] Immerse cordierite honeycomb ceramics in the mixture of the above-mentioned salt solution and colloid for 20 minutes, and then coat the modified alumina. ℃ for 3 hours to obtain a cordierite honeycomb ceramic substrate coated with modified alumina.

[0048] (2) Discharge stren...

Embodiment 2

[0063] (1) Coating of modified alumina on cordierite honeycomb ceramic substrate

[0064] The mixed solution of iron salt, cobalt salt, nickel salt is mixed with the water-soluble colloid of aluminum hydroxide, and described iron salt, cobalt salt, nickel salt are Fe(NO 3 ) 3 9H 2 O, Co(AC) 3 4H 2 O, Ni(NO 3 ) 4 ·6H 2 O, specifically weigh 39.9530g Fe(NO 3 ) 3 9H 2 O, 24.6339g Co(AC) 3 4H 2 O, 28.4672g Ni(NO 3 ) 4 ·6H 2 O was dissolved in 25ml of deionized water, mixed with colloid containing 15ml of deionized water and 60.4111g of aluminum hydroxide, and magnetically stirred; in the prepared mixed solution, the molar ratio of iron, cobalt, nickel, and aluminum was 1.5:1.5: 1.5:5.5;

[0065] Immerse cordierite honeycomb ceramics in the mixture of the above-mentioned salt solution and colloid for 25 minutes, and then coat the modified alumina. ℃ for 2 hours to obtain a cordierite honeycomb ceramic matrix coated with modified alumina.

[0066] (2) Discharge stre...

Embodiment 3

[0081] (1) Coating of modified alumina on cordierite honeycomb ceramic substrate

[0082]The mixed solution of iron salt, cobalt salt, nickel salt is mixed with the water-soluble colloid of aluminum hydroxide, and described iron, cobalt, nickel salt are Fe(NO 3 ) 3 9H 2 O, Co(AC) 3 4H 2 O, Ni(NO 3 ) 4 ·6H 2 O, specifically weigh 59.8240g Fe(NO 3 ) 3 9H 2 O, 36.8859g Co(AC) 3 4H 2 O, 42.6257g Ni(NO 3 )4·6H 2 O was dissolved in 30ml of deionized water, mixed with a colloid containing 10ml of deionized water and 49.3404g of aluminum hydroxide, and magnetically stirred; in the prepared mixed solution, the molar ratio of iron, cobalt, nickel, and aluminum was 2:2: 2:4;

[0083] Immerse cordierite honeycomb ceramics in the mixture of the above-mentioned salt solution and colloid for 30 minutes, and then coat the modified alumina. ℃ for 1 h to obtain a cordierite honeycomb ceramic substrate coated with modified alumina.

[0084] (2) Discharge strengthening pretreatmen...

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Abstract

The invention discloses a catalyst used for purifying a volatile organic compound and a preparation method of the catalyst. According to the catalyst, aluminum oxide modified by iron, cobalt and nickel serves as a carrier, cordierite honeycomb ceramic serves as a substrate, and a mixture of platinum in a very low content and palladium serves as an active component, wherein the molar ratio of the platinum to the palladium is (0-1):(0-9), the mixture of the platinum and the palladium accounts for 0.01-0.05% of the substrate by mass, and the mass of the carrier is 3-5% of the mass of the substrate. The preparation method comprises the steps that firstly, the carrier is coated; secondly, discharge enhancing pretreatment is conducted; thirdly, an active component impregnation liquid is prepared; fourthly, the active component is subjected to support and reduction. By means of the method, the defects that an existing catalyst used for purifying the volatile organic compound is too complex in modification, tedious in preparation technology process and high in noble metal supported content, and accordingly the cost is high are overcome, and the catalyst prepared by using the method is good in low-temperature activity and excellent in high-temperature resistance.

Description

technical field [0001] The invention relates to the fields of air pollution control technology and environmental protection catalytic materials, in particular to a catalyst for purifying volatile organic compounds and a preparation method thereof. Background technique [0002] The emission of volatile organic compounds (VOCs) directly affects human health and environmental quality. And VOCs undergo secondary conversion to generate ozone O 3 and fine particulate matter PM 2.5 , the latter is the main cause of smog. In view of the fact that VOCs will directly and indirectly cause great harm to human health and the ecological environment, the country has attached great importance to the control of VOCs. Commonly used VOCs control technologies mainly include recovery method and destruction method. Among them, the destruction method mainly includes combustion method, biological method, plasma method and photocatalytic method. The combustion method is recognized as one of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/18B01J37/34B01D53/86B01D53/72
CPCB01D53/8668B01J23/892B01J37/18B01J37/342B01D2255/1023B01D2255/20753B01D2257/708B01D53/8687B01D2255/1021B01D2255/20738B01D2255/20746B01D2255/2092Y02A50/20B01J23/755B01D53/865B01J21/04B01J23/42B01J23/44B01J35/04B01J37/0207B01J37/0213B01J37/0217
Inventor 付名利甘琪贺辉吴军良叶代启
Owner 东莞中维环保工程有限公司
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