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Attapulgite-supported CoTiO3-CeO2-heterojunction SCR low-temperature denitrification catalyst and preparation method thereof

A low-temperature denitrification and attapulgite technology, which is applied in the field of flue gas denitrification, can solve the problems of strong reaction conditions, more secondary pollution, and narrow activity range, and achieve the effects of lower reaction temperature, less secondary pollution, and easy molding

Active Publication Date: 2017-09-05
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the existing flue gas denitrification catalysts that are expensive, have a narrow activity range, and are resistant to SO 2 Weak performance, strong reaction conditions, high energy consumption, secondary pollution and many other problems provide an attapulgite-loaded CoTiO 3 -CeO 2 Heterojunction SCR low-temperature denitration catalyst, with attapulgite as the carrier, and the active component of the load is CeO 2 and perovskite CoTiO 3 , enhanced redox capacity by light-assisted,

Method used

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  • Attapulgite-supported CoTiO3-CeO2-heterojunction SCR low-temperature denitrification catalyst and preparation method thereof
  • Attapulgite-supported CoTiO3-CeO2-heterojunction SCR low-temperature denitrification catalyst and preparation method thereof
  • Attapulgite-supported CoTiO3-CeO2-heterojunction SCR low-temperature denitrification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Fully disperse attapulgite in ethanol to obtain a dispersion with a concentration of 5g / 100mL, measure 100mL of the dispersion, and add 1.0g of Ce(NO 3 ) 3 ·6H 2 0, fully stirred at room temperature for 2 hours to obtain a mixed slurry; after the stirring was completed, adjust the pH=7 of the mixed slurry with ammonia water, after continuing to stir for 1 hour, suction filter and wash the filter cake with deionized water to neutrality, and dry at 80 ° C. Get CeO 2 / ATP;

[0020] (2) Dissolve 1.5g of cobalt acetate tetrahydrate, 1.4g of tetrabutyl titanate, and 2.26g of citric acid in 20ml of ethanol, and add them to a three-necked flask in turn, and stir at 70°C for 0.5h until the solution forms a sol state. ,

[0021] (3) CeO prepared in step (1) 2 / ATP ground and sieved, dispersed in absolute ethanol to obtain a dispersion with a concentration of 5g / 100mL, and added to the sol obtained in step (2), sealed to prevent evaporation and stirred for 1h, then dried ...

Embodiment 2

[0030] (1) Fully disperse attapulgite in ethanol to obtain a dispersion with a concentration of 5g / 100mL, measure 100mL of the dispersion, and add 0.52g of Ce(NO 3 ) 3 ·6H 2 0, fully stirred at room temperature for 2 hours to obtain a mixed slurry; after the stirring was completed, adjust the pH=7 of the mixed slurry with ammonia water, after continuing to stir for 1 hour, suction filter and wash the filter cake with deionized water to neutrality, and dry at 80 ° C. Get CeO 2 / ATP;

[0031] (2) Dissolve 1g of cobalt acetate tetrahydrate, 1.4g of tetrabutyl titanate and 1.5g of citric acid in 20ml of ethanol, and add them to a three-necked flask in turn, and stir at 70°C for 0.5h until the solution forms a sol state.

[0032] (3) with embodiment 1.

Embodiment 3

[0034] (1) Fully disperse attapulgite in ethanol to obtain a dispersion with a concentration of 5g / 100mL, measure 100mL of the dispersion, and add 0.86g of Ce(NO 3 ) 3 ·6H 2 0, fully stirred at room temperature for 2 hours to obtain a mixed slurry; after the stirring was completed, adjust the pH=7 of the mixed slurry with ammonia water, after continuing to stir for 1 hour, suction filter and wash the filter cake with deionized water to neutrality, and dry at 80 ° C. Get CeO 2 / ATP;

[0035] (2) Dissolve 1.5g of cobalt acetate tetrahydrate, 2.1g of tetrabutyl titanate, and 2.26g of citric acid in 20ml of ethanol, and add them to a three-necked flask in sequence, and stir at 70°C for 0.5h until the solution forms a sol state ,

[0036] (3) with embodiment 1.

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Abstract

The invention belongs to the field of flue gas denitrification, and particularly relates to an attapulgite-supported CoTiO3-CeO2-heterojunction SCR low-temperature denitrification catalyst and a preparation method thereof. By using non-metal clay minerals as a support, the supported active metals are cheap nontoxic high-activity CeO2 and CoTiO3; the two semiconductors form the heterojunction structure, and generate holes and electron pairs when being assisted by light, thereby enhancing the redox capacity, and effectively lowering the reaction temperature; and thus, the denitrification catalyst, which has the advantages of high denitrification properties, excellent SO2 resistance, mild reaction conditions, low energy consumption and low secondary pollution, is formed.

Description

technical field [0001] The invention belongs to the field of flue gas denitrification, in particular to an attapulgite loaded CoTiO 3 -CeO 2 A heterojunction SCR low-temperature denitrification catalyst and a preparation method thereof. Background technique [0002] NO x The emissions of NOx have brought great harm to human production and life and the natural environment. In terms of human health, ecological environment and even global pollution problems, the control of NO x The generation and emission of pollutants are very important issues. [0003] Selective catalytic reduction (selective catalytic reduction, SCR) is the most widely used flue gas denitrification technology in the world today. This method uses NH 3 As a reducing agent, reducing NOx to N 2 . At present, vanadium-tungsten iron series catalysts are often used as denitrification catalysts in coal-fired thermal power plants, but their denitrification temperature is relatively high, so the device can only ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/83B01J2523/00B01J2523/22B01J2523/31B01J2523/3712B01J2523/41B01J2523/47B01J2523/845
Inventor 罗士平黄晓艳周兴蒙谢爱娟陶凤左士祥姚超
Owner CHANGZHOU UNIV
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