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Denitration catalyst for wide temperature window under high sulfur condition and preparation method thereof

A denitration catalyst, wide temperature technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as pipeline blockage and corrosion, and achieve good denitration activity. Effect

Active Publication Date: 2015-04-22
江苏中创清源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SO 3 As an acidic gas, it will interact with the water vapor in the flue gas and the excess NH in the catalytic reaction gas 3 Neutralizes into salts, such as ammonium sulfate or ammonium bisulfate, which can cause clogging of pipeline deposits or salt corrosion problems

Method used

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  • Denitration catalyst for wide temperature window under high sulfur condition and preparation method thereof
  • Denitration catalyst for wide temperature window under high sulfur condition and preparation method thereof
  • Denitration catalyst for wide temperature window under high sulfur condition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Weigh 0.0428g of ammonium metavanadate and 0.3377g of ammonium paratungstate respectively, and dissolve them in 20ml of oxalic acid solution. Another 0.7040g of manganese acetate solution was added to 10ml of titanium dioxide suspension and fully stirred for 1 hour, then vanadium tungsten solution was added to continue heating and stirring until it became a paste, and dried at 100°C. The dried block was crushed and calcined in air at 550° C. for 5 hours to obtain a manganese-containing catalyst.

Embodiment 2

[0021] Example 2: Weigh 0.0428g of ammonium metavanadate and 0.3377g of ammonium paratungstate, and dissolve them in 20ml of oxalic acid solution. Another 0.6308g of cerium nitrate solution was added to 10ml of titanium dioxide suspension and fully stirred for 1 hour, then vanadium tungsten solution was added to continue heating and stirring until it became a paste, and dried at 100°C. Cerium-containing catalysts were obtained by crushing the dried blocks and calcining them in the air at 550° C. for 5 hours.

Embodiment 3

[0022] Example 3: Weigh 0.0428g of ammonium metavanadate and 0.3377g of ammonium paratungstate, and dissolve them in 20ml of oxalic acid solution. Another 1.2625g of ferric nitrate solution was added to 10ml of titanium dioxide suspension and fully stirred for 1 hour, then vanadium tungsten solution was added to continue heating and stirring until it became a paste, and dried at 100°C. The dried block was crushed and calcined at 550° C. in air for 5 hours to obtain the iron-containing catalyst (1).

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PUM

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Abstract

The invention discloses a denitration catalyst for a wide temperature window under a high sulfur condition and a preparation method thereof. The catalyst is prepared from the following components in percentage by weight of the denitration catalyst: 1wt% of vanadium pentoxide, 6wt% of tungsten trioxide, 5wt% of one of manganese oxide, cerium oxide, ferric oxide without sulfur or ferric oxide with sulfur, and the balance of titanium dioxide. The preparation method comprises the following step: adjusting a commercial V2O5-WO3 / TiO2 catalyst by adding traditional metals iron and manganese and rare earth cerium, specifically, in the preparation process of the catalyst, adding ferric nitrate, ferric sulfate, manganese acetate or cerous nitrate to obtain the highly active catalyst which has good SO2 poisoning resistance and has the denitration activity over 80% under the condition that the temperature is 260-420 DEG C in a relatively wide high-temperature region and the SO2 concentration is high (1000ppm).

Description

technical field [0001] The invention relates to the technical field of nitrogen oxide control in environmental protection, in particular to a denitrification catalyst used under wide temperature window and high sulfur conditions and a preparation method thereof. Background technique [0002] With the advancement of science and technology, productivity has been greatly improved, but the living environment of human beings has also been greatly damaged, and global environmental problems such as acid rain, photochemical smog, ozone layer destruction and greenhouse effect have become increasingly prominent. The occurrence of these problems is closely related to the hydrocarbons and nitrogen oxides emitted by humans into the atmosphere. Most of the large-scale power stations in my country are conventional coal-fired power stations, while NO x It is one of the main pollutants emitted by coal-fired power plants. According to the statistics of the "Research Report on Technical Sche...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/56
Inventor 李俊华彭悦李柯志刘欣郝吉明
Owner 江苏中创清源科技有限公司
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