Catalyst for flue gas denitrification at 250-270 DEG C, and preparation method and application thereof

A C-270, catalyst technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high energy consumption, achieve no secondary pollution, The effect of reducing production costs and reducing emissions

Inactive Publication Date: 2016-10-19
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the defect of high energy consumption of the existing SCR technology, and provide a catalyst for denitrification of flue gas at 250°C-270°C and its preparation method, and

Method used

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  • Catalyst for flue gas denitrification at 250-270 DEG C, and preparation method and application thereof

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Experimental program
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Example Embodiment

[0045] Example 1

[0046] According to the mass percentage, 50% zeolite, 30% nano-alumina, 20% catalytic active ingredients, weigh 50g zeolite, 30g nano-alumina, 20g catalytic active ingredients (active ingredients include copper nitrate, manganese nitrate, cerium nitrate, nitric acid Chromium, ammonium metavanadate, ammonium tungstate, chloroplatinic acid and palladium chloride, in which molar ratio Cu:Mn:Ce:Cr:V:W:Pt:Pd=24:44:18:7:10:1 :1:4), add deionized water according to the liquid-to-solid ratio of 3:1, move it into the ball mill, ball mill for 24 hours to prepare the coating slurry, put the honeycomb ceramic into the coating slurry tank after ball milling and soak for 5 minutes, Take out and purge the excess coating slurry, dry the coated honeycomb ceramics at 120°C for 6 hours, and then calcinate at 500°C for 5 hours to obtain a denitrification catalyst. The catalyst load is 6%.

[0047] The simulated denitration test shows that when the NO volume concentration is 1340mg / ...

Example Embodiment

[0048] Example 2

[0049] According to the mass percentage, 40% zeolite, 30% nano-alumina, 30% catalytic active ingredients, weigh 40g zeolite, 30g nano-alumina, 30g catalytic active ingredients (active ingredients include copper nitrate, manganese nitrate, cerium nitrate, nitric acid Chromium, ammonium metavanadate, ammonium tungstate, chloroplatinic acid and palladium chloride, in which molar ratio Cu:Mn:Ce:Cr:V:W:Pt:Pd=20:45:21:8:9:1 :2:4) Add deionized water according to the liquid-solid ratio of 2:1, move it into the ball mill, ball mill for 30 hours, put the honeycomb ceramic into the coating slurry tank after ball milling and soak for 7 minutes, take out and purge the excess slurry The coated honeycomb ceramic is dried at 120°C for 10 hours, and then calcined at 500°C for 5 hours to obtain a denitrification catalyst. The catalyst load is 8%.

[0050] The simulated denitrification test shows that when the NO volume concentration is 1600mg / m 3 , NH 3 / NO=1, oxygen concentrati...

Example Embodiment

[0051] Example 3

[0052] According to the mass percentage, 60% zeolite, 20% nano-alumina, 20% catalytic active ingredients, weigh 60g zeolite, 20g nano-alumina, 20g catalytic active ingredients (active ingredients include copper nitrate, manganese nitrate, cerium nitrate, nitric acid Chromium, ammonium metavanadate, ammonium tungstate, chloroplatinic acid and palladium chloride, in which molar ratio Cu:Mn:Ce:Cr:V:W:Pt:Pd=18:47:22:7:9:1 :1:4) Add deionized water according to the liquid-solid ratio of 1:1, move it into the ball mill, ball mill for 36 hours, put the honeycomb ceramic into the coating slurry tank after ball milling, soak for 5 minutes, take out and purge the excess slurry Material: The coated honeycomb ceramics are dried at 120°C for 10 hours, and then calcined at 500°C for 5 hours to obtain a denitration catalyst. The catalyst load is 10%.

[0053] The simulated denitrification test shows that when the volume concentration of NO is 1860mg / m 3 , NH 3 / NO=1, oxygen co...

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Abstract

The invention belongs to the technical field of environmental protection, and relates to a catalyst for flue gas denitrification at 250-270 DEG C, a preparation method thereof and application thereof in the denitration treatment of exhaust gas containing nitrogen oxide. The catalyst comprises a catalyst coating and honeycomb ceramic, wherein the catalyst coating coats on the surface of honeycomb ceramic. The catalyst coating includes deionized water and a slurry group comprising the following components by weight: 40-60% of zeolite, 10-30% of nanometer alumina, and 10-30% of a catalytic active component, wherein the deionized water is added by the liquid-solid ratio of 1-3:1. The preparation method comprises the steps of: (1) mixing components of catalyst coating; (2) conducting ball milling on the mixed components to obtain the coating slurry; (3) coating; and (4) roasting. The invention provides application of the catalyst in the denitration treatment of exhaust gas containing nitrogen oxide. The denitration catalyst prepared by the method has high denitration efficiency at 250 to 270 DEG C, reduces the reaction temperature required in the existing SCR technology; and the application method that reduces the energy consumption and reduces thermal pollution emission.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a catalyst for flue gas denitrification at 250°C-270°C, a preparation method and application thereof. Background technique [0002] Nitrogen oxides (NO X ) is one of the main air pollutants, including NO, NO 2 , N 2 O, etc., can cause acid rain, photochemical smog, greenhouse effect and the destruction of the ozone layer, and has become the second largest killer of air pollution. 63% of NO in nature X It comes from industrial pollution (exhaust gas from power plants, exhaust gas from stainless steel pickling, etc.) and traffic pollution (vehicle exhaust), which is more than twice that of natural sources. According to relevant reports, the annual losses caused by nitrogen oxides amount to more than 100 billion RMB. [0003] As countries around the world pay more attention to environmental pollution control, the nitrogen oxide treatment technology in exhaust gas...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01D53/86B01D53/56
Inventor 范建伟潘荣幸孙宇冉献强邹立寅张增胜薛峰赵奇
Owner TONGJI UNIV
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