Wide temperature range type phosphorus-containing cerium-based denitration catalyst and preparation method thereof

A denitrification catalyst, cerium-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as poor catalytic activity

Active Publication Date: 2016-01-06
THE NORTHWEST RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN101642715A discloses a cerium pyrophosphate catalyst, although the temperature has higher denitration efficiency above 350°C, but the catalytic activity is relatively poor at temperatures below 350°C

Method used

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  • Wide temperature range type phosphorus-containing cerium-based denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Example 1: Preparation of phosphorus-containing cerium-based denitration catalyst of the present invention

[0084] The implementation steps of this embodiment are as follows:

[0085] I, preparation solution A

[0086] Dissolve cerous nitrate in deionized water to obtain a cerous nitrate aqueous solution, and then add the cerous nitrate aqueous solution to the pyrophosphoric acid aqueous solution according to the molar ratio of cerous nitrate and pyrophosphoric acid as 1.0:1, and stir evenly Obtain solution A;

[0087] II. Prepare Solution B

[0088] According to the mol ratio of cerous nitrate and urea is 1.2:10, in the solution A that step 1 obtains, slowly add urea, allow urea to dissolve completely, obtain solution B;

[0089] III. Prepare Solution C

[0090] Dissolving manganese acetate in deionized water to obtain an aqueous solution of manganese acetate, and then slowly adding the aqueous solution of manganese acetate to solution B according to the molar rat...

Embodiment 2

[0096] Example 2: Preparation of phosphorus-containing cerium-based denitration catalyst of the present invention

[0097] The implementation steps of this embodiment are as follows:

[0098] I, preparation solution A

[0099] Dissolve cerous nitrate in deionized water to obtain a cerous nitrate aqueous solution, and then add the cerous nitrate aqueous solution to the pyrophosphoric acid aqueous solution according to the molar ratio of cerous nitrate and pyrophosphoric acid as 2.4:1, and stir evenly Obtain solution A;

[0100] II. Prepare Solution B

[0101] Be 2.2:10 according to the mol ratio of cerous nitrate and urea, slowly add urea in the solution A that step 1 obtains, allow urea to dissolve completely, obtain solution B;

[0102] III. Prepare Solution C

[0103] Dissolving manganese acetate in deionized water to obtain an aqueous solution of manganese acetate, and then slowly adding the aqueous solution of manganese acetate to solution B according to the molar rati...

Embodiment 3

[0109] Example 3: Preparation of phosphorus-containing cerium-based denitration catalyst of the present invention

[0110] The implementation steps of this embodiment are as follows:

[0111] I, preparation solution A

[0112] Dissolve cerous nitrate in deionized water to obtain a cerous nitrate aqueous solution, and then add the cerous nitrate aqueous solution to the pyrophosphoric acid aqueous solution according to the molar ratio of cerous nitrate and pyrophosphoric acid as 3.6:1, and stir evenly Obtain solution A;

[0113] II. Prepare Solution B

[0114] According to the mol ratio of cerous nitrate and urea is 0.5:10, slowly add urea in the solution A that step 1 obtains, allow urea to dissolve completely, obtain solution B;

[0115] III. Prepare Solution C

[0116] Dissolving manganese acetate in deionized water to obtain an aqueous solution of manganese acetate, and then slowly adding the aqueous solution of manganese acetate to solution B according to the molar rati...

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Abstract

The invention relates to a wide temperature range type phosphorus-containing cerium-based denitration catalyst and a preparation method thereof. The catalyst is mainly prepared from cerium phosphate (CePO4) and manganese oxide Mn2O3 according to the molar ratio of 1:0.5-3. The wide temperature range type phosphorus-containing cerium-based denitration catalyst has the nitrogen oxide removal temperature interval of 150-500 DEG C and has high denitration stability and N2 selectivity. In particular, the nitrogen oxide removal effects of the phosphorus-containing cerium-based denitration catalyst in low-medium temperature intervals (150-350 DEG C) are good, and the nitrogen oxide conversion rates are both above 90%.

Description

【Technical field】 [0001] The invention belongs to the technical field of environmental protection. More specifically, the present invention relates to a wide-temperature type phosphorus-containing cerium-based denitration catalyst, and also relates to a preparation method of the wide-temperature type phosphorus-containing cerium-based denitration catalyst. 【Background technique】 [0002] Nitrogen oxides are mainly produced by the high-temperature combustion of fossil fuels in the air, and nitrogen oxides produced in the combustion of fossil fuels (petroleum, coal, natural gas) account for more than 90%. With the rapid development of industry, excessive nitrogen oxides from vehicle exhaust and coal-fired flue gas have brought great pollution to the atmosphere, and the concentration of nitrogen oxides is still increasing year by year. NO can produce chemical smog under sunlight, which poses a great threat to the human respiratory system; at the same time, it can also damage t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/187B01D53/86B01D53/56
Inventor 李飞仵静黄伟侯鑫刘程
Owner THE NORTHWEST RES INST OF CHEM IND
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