Low-temperature denitration catalyst and preparation method thereof

A low-temperature denitration and catalyst technology, applied in the field of denitration catalysts, can solve problems such as affecting the denitration efficiency of the catalyst and being unable to mix efficiently and uniformly.

Active Publication Date: 2021-04-20
ZHEJIANG TUNA ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing stirring device used for low-temperature denitrification catalyst, a two-way rotating shaft is usually used to drive the stirring rod to stir the material, which cannot completely mix various solid and liquid materials of the low-temperature denitrification catalyst efficiently and uniformly, which affects the denitrification efficiency of the catalyst. Therefore, it is also necessary to improve the stirring device

Method used

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  • Low-temperature denitration catalyst and preparation method thereof
  • Low-temperature denitration catalyst and preparation method thereof
  • Low-temperature denitration catalyst and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0028] A low-temperature denitration catalyst, the low-temperature denitration catalyst includes a cordierite carrier and an active component coated on the carrier, the loading of the active component is 3wt%; the active component includes 3wt% V 2 o 5 , 10wt% MoO 3 , 2.5wt% SiO 2 , 82.2wt% TiO 2 and 2.3wt% phosphate ion, and the loading amount of vanadium element in the active component in the low-temperature denitration catalyst is 5.04wt%.

[0029] The preparation method of the low-temperature denitration catalyst comprises the following steps:

[0030] (a) Add deionized water into the stirring device, add titanium dioxide while stirring, then add oxalic acid-ammonium metavanadate mixed solution, ammonium heptamolybdate, wherein the mass concentration of oxalic acid-ammonium metavanadate mixed solution is 20% The oxalic acid solution and the ammonium metavanadate solution with a mass concentration of 30% are mixed according to a mass ratio of 1:1. After stirring and mix...

Embodiment 2

[0039] A low-temperature denitration catalyst, the low-temperature denitration catalyst includes a cordierite carrier and an active component coated on the carrier, the loading of the active component is 1.8wt%; the active component includes 6.5wt% V 2 o 5 , 3wt% MoO 3 , 3wt% SiO 2 , 86.5wt% TiO 2 and 1wt% phosphate ion, and the loading amount of vanadium element in the active component in the low-temperature denitration catalyst is 6.55wt%.

[0040] The preparation method of the low-temperature denitration catalyst comprises the following steps:

[0041] (a) Add deionized water into the stirring device, add titanium dioxide while stirring, then add oxalic acid-ammonium metavanadate mixed solution, ammonium heptamolybdate, wherein the mass concentration of oxalic acid-ammonium metavanadate mixed solution is 20% The oxalic acid solution and the ammonium metavanadate solution with a mass concentration of 30% are mixed according to a mass ratio of 1:1. After stirring and mixi...

Embodiment 3

[0046] A low-temperature denitration catalyst, the low-temperature denitration catalyst includes a cordierite carrier and an active component coated on the carrier, the loading of the active component is 1.1wt%; the active component includes 11.5wt% V 2 o 5 , 12wt% MoO 3 , 3.7wt% SiO 2 , 70wt% TiO 2 and 2.8wt% phosphate ion, and the loading amount of vanadium element in the active component in the low-temperature denitration catalyst is 7.09wt%.

[0047] The preparation method of the low-temperature denitration catalyst comprises the following steps:

[0048] (a) Add deionized water into the stirring device, add titanium dioxide while stirring, then add oxalic acid-ammonium metavanadate mixed solution, ammonium heptamolybdate, wherein the mass concentration of oxalic acid-ammonium metavanadate mixed solution is 20% The oxalic acid solution and the ammonium metavanadate solution with a mass concentration of 30% are mixed according to a mass ratio of 1:1. After stirring and ...

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Abstract

The invention discloses a low-temperature denitration catalyst and a preparation method thereof, the low-temperature denitration catalyst comprises a cordierite carrier and an active component coated on the carrier, and the loading capacity of the active component is 1.1-3.5 wt%; wherein the active component comprises 3 to 12 wt% of V2O5, 3 to 12 wt% of MoO3, 1 to 4 wt% of SiO2, 70 to 90 wt% of TiO2 and 0.5 to 3 wt% of phosphate ions, and the loading capacity of the vanadium element in the active component in the low-temperature denitration catalyst is 5.04 to 8.23wt%. The preparation process is simple and easy to implement, and the obtained catalyst has good low-temperature catalytic activity and sulfur resistance.

Description

technical field [0001] The invention relates to the technical field of denitration catalysts, in particular to a low-temperature denitration catalyst and a preparation method thereof. Background technique [0002] SCR technology is currently the most widely used flue gas denitrification technology, and the low-temperature denitrification catalyst used in it is suitable for temperatures between 300 and 420 °C. For non-electricity industries, the components of the flue gas produced during the production process are complex, and the discharge temperature is generally lower than 300°C. If the existing high-temperature and low-temperature denitrification catalyst is still used for denitrification at this discharge temperature, low catalyst activity and sulfur tolerance will occur. The problem of poor performance, that is to say, the existing high-temperature denitrification catalyst is not suitable for flue gas denitrification in non-electric industries. Therefore, designing a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/16B01J37/00B01J37/02B01J37/08B01D53/86B01D53/56B01F7/30
Inventor 赵博马太余王阔李浙飞沈刚峰刘格陈天德
Owner ZHEJIANG TUNA ENVIRONMENTAL SCI & TECH
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