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Denitration catalyst with sulfur oxidation preventive characteristic and preparation method thereof

A denitration catalyst, sulfur oxidation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of reducing catalyst service life, catalyst deactivation, reducing catalytic and other problems, to achieve the effect of reducing downstream corrosion and clogging, high activity and good pore structure

Inactive Publication Date: 2013-01-16
CHONGQING UNIV +2
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfates degrade catalysis, corrode and clog commercial reactor systems downstream, causing catalyst deactivation and greatly reducing catalyst life
In addition, the NO caused by the decreased activity x Increased emissions and disposal of vanadium-containing catalysts after deactivation will also bring environmental problems that cannot be ignored

Method used

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Experimental program
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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with specific embodiments.

[0020] (1) A denitrification catalyst with anti-sulfur oxidation properties, see the following table for specific examples, and the unit of components is mass percent;

[0021] Example V 2 o 5 WO 3 BaO TiO 2 SO 2 Oxidative activity of Denitrification rate Example 1 1 5 2 margin 0.30% above 95 Example 2 1 5 1 margin 0.32% above 95 Example 3 1 10 2 margin 0.36% above 95 Example 4 1 10 1 margin 0.32% above 95

[0022] (2) The preparation method of the present invention is described by taking Example 1 as an example.

[0023] Calculate NH according to the composition of implementation 1 4 VO, (NH 4 ) 10 h 2 (W 2 o 7 ) 6 , Ba(ClO 4 ) 2 ·3H 2 O and TiO 2 required amount, and proceed as follows:

[0024] (1) Preparation of impregnation solution: Take 0.3857g NH 4 VO 3 , 1.649...

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PUM

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Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a denitration catalyst with a sulfur oxidation preventive characteristic and a preparation method thereof. The catalyst comprises, by mass, 1% of V2O, 5-10% of WO3, 1-2% of BaO and the balance being TiO2. The preparation method of the denitration catalyst includes three steps of preparation of impregnation liquid, loading of active components and roasting. As the denitration catalyst is modified by BaO, the modified denitration catalyst has good pore structure, obvious change of the acid center position is avoided, oxidation of SO2 on the surface of the catalyst is suppressed, and NO removal rate is higher than 95%. The denitration catalyst with the sulfur oxidation preventive characteristic and the preparation method thereof are adaptable to the characteristic of high sulfur content of domestic coals, the service life of the catalyst is prolonged effectively, and flue gas denitration cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a denitration catalyst with anti-sulfur oxidation properties and a preparation method thereof. [0002] Background technique [0003] Nitrogen oxides NOx include NO, NO 2 , N 2 O, N 2 o 3 , and N 2 o 4 etc., mainly NO and NO 2 It is one of the main pollutants in the atmosphere today, and it can cause acid rain, photochemical smog, the hole in the ozone layer, etc., and damage human health. NO X The rapid increase of emissions has led to a series of environmental problems. The burning of fossil fuels is the main cause of the increase in the concentration of nitrogen oxides in the atmosphere year by year. According to statistics, more than 90% of NO in my country's air pollutants X Originating from the combustion process of fossil fuels (such as coal, oil, natural gas, etc.), this makes flue gas denitrification another key area for my country to control pol...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01D53/90B01D53/56
Inventor 刘清才丁健徐晶席文昌陈亮吴国防杨剑成丹张政科牛德良朱博洪兰苑培孙健杨强邓巧莲
Owner CHONGQING UNIV
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