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Chlorine-containing organic matter combustion catalyst with high HCl selectivity and preparation method thereof

A combustion catalyst, selective technology, applied in combustion methods, physical/chemical process catalysts, chemical instruments and methods, etc., to inhibit the formation of polychlorinated products and avoid secondary pollutants.

Pending Publication Date: 2022-04-08
SHANGHAI ENVIRONMENTAL & SANITARY ENG DESIGN INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention discloses a high HCl selectivity chlorine-containing organic combustion catalyst and a preparation method thereof. Formation, to avoid the problem of secondary pollutants

Method used

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  • Chlorine-containing organic matter combustion catalyst with high HCl selectivity and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Weigh 2.53g of ammonium metavanadate, dissolve it in ethanolamine aqueous solution, heat to dissolve; weigh 10gTiO 2 , mixed it into a ball mill jar, ball milled it at 500 rpm for 30 minutes, then coated it on the surface of the monolithic honeycomb ceramics, and dried it overnight at 100°C; then, fired it at 600°C for 4 hours to prepare Obtain A; then, impregnate Ru solution on the surface of A, dry at 100°C for 20 hours; bake at 500°C for 4 hours to obtain oxidation state catalyst B; pass oxidation state catalyst B through 10% H 2 -90%N 2 Under the atmosphere, reduce at 450°C for 2 hours to obtain the finished catalyst 0.01%Ru / 3%V-27%TiO 2 / whole honeycomb.

Embodiment 2

[0016] 10gTiO 2 , add 15g of water, make a slurry by ball milling, apply it on the surface of the whole honeycomb, dry it at 120°C, and dry it overnight; bake it at 550°C for 4 hours to make A; then impregnate the surface of A with a mixture of Ru and chromium nitrate Precursor salt solution, dried at 100°C for 20 hours; roasted at 500°C for 4 hours to obtain catalyst B in oxidation state; reduced catalyst B in oxidation state in hydrazine hydrate solution to obtain finished catalyst 0.01% Ru-10 %Cr / 20%TiO 2 / whole honeycomb.

Embodiment 3

[0018] Add 10g of CeZrOx and 15g of water, and make a slurry by ball milling, apply it on the surface of the whole honeycomb, and dry it at 140°C for 10 hours; at 700°C, bake it for 3 hours to prepare A; then, Immerse the precursor salt solution of ammonium metavanadate and chromium nitrate on the surface of A, dry at 100°C for 10 hours; bake at 500°C for 4 hours to prepare B; then impregnate the Ru precursor solution on the surface of B, Dry at 80°C for 24 hours; roast at 500°C for 3 hours to obtain catalyst C in oxidation state; pass catalyst C in oxidation state through 10% H 2 -90%N 2 Reduction, the finished catalyst is prepared 0.02%Ru / 5%V-5%Cr / 25%CeZrOx / integral honeycomb.

[0019] Catalyst evaluation conditions:

[0020] Activity evaluation conditions: 1000ppm chlorobenzene, air as balance gas, GHSV=20000h -1 , the loading amount of the catalyst is 1ml, and the results are shown in the table below.

[0021] The following table compares the performance of different c...

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Abstract

The invention discloses a chlorine-containing organic matter combustion catalyst with high HCl selectivity and a preparation method thereof, and particularly relates to the field of atmospheric pollutant catalytic purification, the active component of the catalyst is Ru, the auxiliary agent is one or a combination of two of V and Cr, and the metal oxide carrier is one or a combination of more of TiO2, Al2O3 and CeZrOx; wherein the content of Ru accounts for 0.01-0.1% of the weight of the whole catalyst, the content of V and Cr is 0.5-20%, the atomic ratio of (Cr + V) / Ru is 10000-10, and the balance is the metal oxide carrier. The catalyst provided by the invention has high selectivity of HCl combustion products, can effectively inhibit the formation of polychlorinated products in combustion byproducts by regulating the selectivity of HCl in the combustion products, and avoids the problem of secondary pollutants.

Description

technical field [0001] The invention belongs to the field of catalytic purification of air pollutants, in particular to a combustion catalyst containing chlorine-containing organic matter with high HCl selectivity and a preparation method thereof. Background technique [0002] Chlorine-containing volatile organic compounds (CVOCs) are widely used in industry, agriculture, pesticides, medicine, organic synthesis and other fields. During its use, it enters the environment through volatilization, leakage, emission, etc., which will cause damage to the ozone layer, and it is easy to photochemically react with NOx near the ground to generate ozone. However, CVOCs are difficult to biodegrade and have the "three causes" of carcinogenicity, teratogenicity and mutagenicity. Therefore, it is necessary to reduce the emission of CVOCs. [0003] CVOCs emission reduction can be removed by chemical methods (thermal incineration, catalytic combustion, photocatalysis, etc.), physical metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652B01D53/86B01D53/56B01D53/72F23G7/07
Inventor 周洪权王胜宋学顶王树东孙向军邰俊张瑞娜刘泽庆
Owner SHANGHAI ENVIRONMENTAL & SANITARY ENG DESIGN INST CO LTD
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