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Zirconium doped cerium vanadate denitration catalyst, preparation method and application

A technology of denitrification catalyst and cerium vanadate, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., to achieve the effects of strong selectivity, wide temperature window, and simple preparation methods

Active Publication Date: 2015-11-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the denitration catalyst based on vanadate modification is worthy of further development, and the denitration catalyst based on binary metal vanadate has not been reported yet.

Method used

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  • Zirconium doped cerium vanadate denitration catalyst, preparation method and application
  • Zirconium doped cerium vanadate denitration catalyst, preparation method and application
  • Zirconium doped cerium vanadate denitration catalyst, preparation method and application

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Embodiment 1

[0037] The catalyst has a rod-like structure, the length of the rod is 50-150nm, and the diameter is 5-100nm.

[0038] The preparation method of the above-mentioned zirconium-doped cerium vanadate denitration catalyst comprises the following steps:

[0039] (1) Prepare cerium nitrate solution and zirconium nitrate solution respectively, mix them evenly after stirring, the molar ratio of the metal cerium element in the cerium nitrate solution and the metal zirconium element in the zirconium nitrate solution is 0.85:0.15;

[0040] (2) Add fully dissolved ammonium metavanadate to the mixed solution obtained in step (1), and stir evenly, wherein the molar ratio of metal vanadium to metal cerium in ammonium metavanadate is 1:0.85;

[0041] (3) Adjust the mixed solution obtained in step (2) to pH=8.0 with NaOH;

[0042] (4) Transfer the turbid solution obtained in step (3) into a 100ml polytetrafluoroethylene kettle liner, and in an autoclave at 180 o After reacting for 12 hours a...

Embodiment 2

[0048] The catalyst has a rod-like structure, and the length and diameter of the rods are 10-100nm and 5-100nm.

[0049] The present invention provides a kind of preparation method of above-mentioned zirconium doped cerium vanadate denitration catalyst, it comprises the following steps:

[0050] (1) Prepare cerium nitrate solution and zirconium nitrate solution respectively, mix them evenly after stirring, the molar ratio of the metal cerium element in the cerium nitrate solution and the metal zirconium element in the zirconium nitrate solution is 0.90:0.10;

[0051] (2) Add fully dissolved ammonium metavanadate to the mixed solution obtained in step (1), and stir evenly, wherein the molar ratio of metal vanadium to metal cerium in ammonium metavanadate is 1:0.90;

[0052] (3) Adjust the mixed solution obtained in step (2) to pH=8.0 with NaOH;

[0053] (4) Transfer the turbid solution obtained in step (3) into a 100ml polytetrafluoroethylene kettle liner, and in an autoclave ...

Embodiment 3

[0058] The catalyst has a granular structure with a particle diameter of 5-100nm.

[0059] The present invention provides a kind of preparation method of above-mentioned zirconium doped cerium vanadate denitration catalyst, it comprises the following steps:

[0060] (1) Prepare cerium nitrate solution and zirconium nitrate solution respectively, mix them evenly after stirring, the molar ratio of the metal cerium element in the cerium nitrate solution and the metal zirconium element in the zirconium nitrate solution is 0.50:0.50;

[0061] (2) Add fully dissolved ammonium metavanadate to the mixed solution obtained in step (1), and stir evenly, wherein the molar ratio of metal vanadium to metal cerium in ammonium metavanadate is 1:0.50;

[0062] (3) Adjust the mixed solution obtained in step (2) to pH=8.0 with NaOH;

[0063] (4) Transfer the turbid solution obtained in step (3) into a 100ml polytetrafluoroethylene kettle liner, and in an autoclave at 180 o After reacting for 1...

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Abstract

The invention discloses a zirconium doped cerium vanadate denitration catalyst which is characterized in that the denitration catalyst is a nano material having a rodlike or granular structure, wherein the mole ratio of zirconium doping amount to metal cerium is x:(1-x), and x is larger than 0.05 and less than 0.8. The invention also discloses a preparation method and application of the zirconium doped cerium vanadate denitration catalyst. The catalyst is prepared by adopting a hydrothermal process, is wide in operating temperature window, can reach NOx removing rate of 80% or above at the temperature of 150-375 DEG C, also has the advantages of good thermal stability, excellent H2O and SO2 poisoning resistance, simple preparation process, low cost and the like, is suitable for treatment of nitric oxide in a fixed source and a moving source and is applicable to practical application.

Description

technical field [0001] The invention relates to the field of chemical nanocatalysts, in particular to a method for NH in stationary and mobile sources 3 -Zirconium-doped cerium vanadate catalyst for SCR denitration, preparation method and application of the catalyst. Background technique [0002] Nitrogen oxides (NO x ) mainly includes NO, NO 2 , N 2 O, etc., is one of the main sources of air pollution. NO x Hazardous, toxic to humans and animals, harmful to plants; NO x It is one of the main causes of acid rain and acid fog; NO x Forms photochemical smog with hydrocarbons; NO x Also involved in the destruction of the ozone layer. Nitrogen oxide NO x It is one of the toxic substances in the exhaust gases of the chemical industry, national defense industry, electric power industry, boilers and internal combustion engines, etc., and NO is also present in some industrial production processes x emissions, with the continuous development of China's economy, energy consu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01D53/86B01D53/56
Inventor 张登松黄垒施利毅赵欣李红蕊
Owner SHANGHAI UNIV
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