Copper-doped low-temperature phosphomolybdic acid denitration catalyst and preparation method thereof

A low-temperature denitration and phosphomolybdic acid technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as poor ability, increase exposure, enhance redox and electron storage capacity, improve The effect of low temperature denitration activity

Active Publication Date: 2019-05-24
ANHUI UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome existing SCR low-temperature catalyst to resist SO 2 In order to solve the problem of poor water vapor ability, a copper-doped phosphomolybdic acid low-temperature denitrification catalyst and its preparation method are provided. The copper-doped phosphomolybdic acid low-temperature denitrification catalyst of the present invention can be used on the basis of ensuring low-temperature denitrification efficiency. on, making the catalyst resistant to SO 2 Enhanced ability with water vapor

Method used

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  • Copper-doped low-temperature phosphomolybdic acid denitration catalyst and preparation method thereof
  • Copper-doped low-temperature phosphomolybdic acid denitration catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0060] Step 1: Preparation of Active Components

[0061] The first step, weigh 1g phosphomolybdic acid, 0.005g PEG (by weighing 0.5% by mass of phosphomolybdic acid) and 2g copper nitrate (control Cu and Mo mol ratio to be 2: 1) and put them in the crucible, add 40ml distilled water to dissolve , stir at a constant speed for 1 h on a magnetic stirrer, and control the stirring temperature to be 25 °C; in the second step, dry the mixture in the first step at a constant speed on a magnetic stirrer, evaporate the water to dryness, and control the drying temperature to be 85 °C; In the third step, the mixture in the second step is placed in a drying oven for constant temperature drying, and the drying temperature is controlled to be 105°C; in the fourth step, the mixture dried in the third step is placed in a muffle furnace for calcination at 350°C for 3 hours. The active ingredient is obtained after cooling.

[0062] Step 2: Preparation of the catalyst

[0063] In the first step...

Embodiment 2

[0065] Step 1: Preparation of Active Components

[0066] The first step, weigh 1g phosphomolybdic acid, 0.005g PEG (by weighing 0.5% of phosphomolybdic acid mass) and 4.7658g copper nitrate (control Cu and Mo mol ratio to be 3: 1) put into the crucible, add 40ml distilled water Dissolve, stir at a constant speed on a magnetic stirrer for 1 h, and control the stirring temperature to be 25 °C; in the second step, dry the mixture in the first step at a constant speed on a magnetic stirrer, evaporate the water to dryness, and control the drying temperature to be 85 °C; In the third step, the mixture in the second step is placed in a drying oven for constant temperature drying, and the drying temperature is controlled to be 105°C; in the fourth step, the mixture dried in the third step is placed in a muffle furnace for calcination at 350°C for 3 hours. , the active component is obtained after cooling.

[0067] Step 2: Preparation of the catalyst

[0068] In the first step, weigh 0....

Embodiment 3

[0070] Step 1: Preparation of Active Components

[0071] The first step, take by weighing 1g phosphomolybdic acid, 0.005g PEG (by weighing 0.5% of phosphomolybdic acid quality) and a certain amount of copper nitrate (controlling the Cu and Mo mol ratio to be 4: 1) put into the crucible, add 40ml distilled water Dissolve, stir at a constant speed on a magnetic stirrer for 1 h, and control the stirring temperature to be 25 °C; in the second step, dry the mixture in the first step at a constant speed on a magnetic stirrer, evaporate the water to dryness, and control the drying temperature to be 85 °C; In the third step, the mixture in the second step is placed in a drying oven for constant temperature drying, and the drying temperature is controlled to be 105°C; in the fourth step, the mixture dried in the third step is placed in a muffle furnace for calcination at 350°C for 3 hours. , the active component is obtained after cooling.

[0072] Step 2: Preparation of the catalyst ...

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Abstract

The invention discloses a copper-doped low-temperature phosphomolybdic acid denitration catalyst and a preparation method thereof and belongs to the technical field of atmospheric pollution control. The copper-doped low-temperature phosphomolybdic acid denitration catalyst adopts anatase-type TiO2 as a carrier and comprises an active composition consisting of phosphomolybdic acid, copper nitrate,polyethylene glycol (PEG) and cetyl trimethyl ammonium bromide (CTAB). A preparation process of the catalyst comprises the steps of placing the phosphomolybdic acid, the copper nitrate, the surfactantCTAB and the PEG into a crucible for dissolution, drying, baking and calcining to obtain the active composition; placing the active composition and TiO2 into the crucible filled with distilled waterfor stirring, drying, baking and calcining to obtain the copper-doped low-temperature phosphomolybdic acid denitration catalyst. By adopting the copper-doped low-temperature phosphomolybdic acid denitration catalyst, the capability of the catalyst to resist SO2 and water vapor can be enhanced on the basis of ensuring the low-temperature denitration efficiency.

Description

technical field [0001] The invention relates to the technical field of air pollution control, and more particularly, to a copper-doped phosphomolybdic acid low-temperature denitration catalyst and a preparation method thereof. Background technique [0002] Industrial flue gas (coke oven flue gas, sintering flue gas, glass kiln flue gas, etc.) x ) main source. NO x It is a toxic gas that can irritate people's eyes and respiratory system and form environmental pollution such as photochemical smog and acid rain. my country NO x The emission base is large. According to the data released by the "China Environmental Status Bulletin", in 2015, NO x The emission is 18.519 million tons, of which the industrial emission is 11.809 million tons, accounting for more than 60% of the total, of which the NO produced with coke oven flue gas and sintering flue gas every year x The sum is close to 2 million tons, and the emissions should not be underestimated. Relevant state ministries a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J27/188B01J35/10B01D53/86B01D53/56
Inventor 贾勇蒋进顾明言夏勇军胡笳陈光龙红明吴胜华丁希楼
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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