High-temperature phosphorus-bearing cerium-manganese-tin composite denitrification catalyst and preparation method thereof

A denitrification catalyst, cerium-manganese technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor catalytic activity, catalyst deactivation, etc., achieve simple preparation methods and reduce production costs , good denitrification effect

Active Publication Date: 2018-05-15
THE NORTHWEST RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN101642715A discloses a cerium pyrophosphate catalyst, although the denitrification efficiency is high above 350°C, but the catalytic activity is relatively poor below 350°C
However, the catalyst gradually degrades above 350 °C, and at the same time, the catalyst deactivates rapidly in the presence of water vapor

Method used

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  • High-temperature phosphorus-bearing cerium-manganese-tin composite denitrification catalyst and preparation method thereof
  • High-temperature phosphorus-bearing cerium-manganese-tin composite denitrification catalyst and preparation method thereof

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Effect test

Embodiment 1

[0024] The high-temperature phosphorus-containing cerium-manganese-tin composite denitrification catalyst in this embodiment is made of cerium phosphate, manganese trioxide and tin oxide, and the molar ratio of cerium phosphate, manganese trioxide and tin oxide is 1:0.15:0.02 ; The nitrogen oxide conversion rate of the catalyst is not lower than 85% under the condition of applicable temperature of 300°C to 500°C.

[0025] The preparation method of the high-temperature phosphorus-containing cerium-manganese-tin composite denitration catalyst comprises the following steps:

[0026] Step 1, take by weighing 0.03mol cerous nitrate (13.02g) and be dissolved in 150mL deionized water, be mixed with cerous nitrate solution, 0.015mol pyrophosphoric acid (2.68g) be dissolved in 100mL deionized water, be mixed with pyrophosphoric acid solution; Add the cerous nitrate solution into the pyrophosphoric acid solution, stir to obtain solution A, drop 0.30mol urea (12.00g) into the solution A ...

Embodiment 2

[0030] The high-temperature phosphorus-containing cerium-manganese-tin composite denitrification catalyst of this embodiment is made of cerium phosphate, manganese trioxide and tin oxide, and the molar ratio of cerium phosphate, manganese trioxide and tin oxide is 1:0.15:0.03 ; The nitrogen oxide conversion rate of the catalyst is not lower than 85% under the condition of applicable temperature of 300°C to 500°C.

[0031] The preparation method of the high-temperature phosphorus-containing cerium-manganese-tin composite denitration catalyst comprises the following steps:

[0032] Step 1, take by weighing 0.03mol cerous nitrate (13.02g) and be dissolved in 150mL deionized water, be mixed with cerous nitrate solution, 0.015mol pyrophosphoric acid (2.68g) be dissolved in 100mL deionized water, be mixed with pyrophosphoric acid solution; Add the cerous nitrate solution into the pyrophosphoric acid solution, stir to obtain solution A, drop 0.30mol urea (12.00g) into the solution A ...

Embodiment 3

[0036] The high-temperature phosphorus-containing cerium-manganese-tin composite denitration catalyst of this embodiment is made of cerium phosphate, manganese trioxide and tin oxide, and the molar ratio of cerium phosphate, manganese trioxide and tin oxide is 1:0.15:0.04 ; The nitrogen oxide conversion rate of the catalyst is not lower than 85% under the condition of applicable temperature of 300°C to 500°C.

[0037] The preparation method of the high-temperature phosphorus-containing cerium-manganese-tin composite denitration catalyst comprises the following steps:

[0038] Step 1, take by weighing 0.03mol cerous nitrate (13.02g) and be dissolved in 150mL deionized water, be mixed with cerous nitrate solution, 0.015mol pyrophosphoric acid (2.68g) be dissolved in 100mL deionized water, be mixed with pyrophosphoric acid solution; Add the cerous nitrate solution into the pyrophosphoric acid solution, stir to obtain solution A, drop 0.30mol urea (12.00g) into the solution A at a...

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Abstract

The invention discloses a high-temperature phosphorus-bearing cerium-manganese-tin composite denitrification catalyst, made by combining cerous phosphate, manganese(III) oxide and tin oxide in a molarratio of 1:0.15:(0.02-0.06); nitrogen oxide conversion rate of the catalyst at the suitable temperature of 300-500 DEG C is not lower than 85%. The invention also discloses a preparation method of the high-temperature phosphorus-bearing cerium-manganese-tin composite denitrification catalyst, comprising: preparing cerous phosphate, and supporting manganese(III) oxide and tin oxide onto the cerousphosphate. The high-temperature phosphorus-bearing cerium-manganese-tin composite denitrification catalyst uses rare-earth elements, cerium, tin and manganese, as active ingredients having low cost;the preparation method is simple; the high-temperature phosphorus-bearing cerium-manganese-tin composite denitrification catalyst has no volatile vanadium. The high-temperature phosphorus-bearing cerium-manganese-tin composite denitrification catalyst has high removal rate of nitrogen oxides at the high temperature zone of 300-500 DEG C and also has good water resistance.

Description

technical field [0001] The invention belongs to the technical field of preparation of denitration catalysts, and in particular relates to a preparation method of a high-temperature phosphorus-containing cerium-manganese-tin composite denitration catalyst. Background technique [0002] Nitrogen oxides are mainly caused 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 automobile exhaust and coal-fired flue gas have brought great pollution to the atmosphere, and the concentration of nitrogen oxides is increasing year by year; NO can produce chemical smog under sunlight, which is harmful to humans. The lower respiratory system of the human body has brought great threat; At the same time, it can destroy the atmosphere and indirectly form acid rain. NH 3 -SCR is the most widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/187B01D53/86B01D53/56
CPCB01D53/8628B01D2255/2065B01D2255/2073B01D2255/2094B01D2255/70B01J27/187B01J37/0201B01J37/08B01J37/10
Inventor 李飞仵静刘程黄伟庞菊玲满雪侯鑫李潇
Owner THE NORTHWEST RES INST OF CHEM IND
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