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Titanium oxide supported cerium zirconium vanadate denitration catalyst, preparation method and application

A denitrification catalyst, cerium vanadate technology, applied in the field of chemical nano-catalysts, to achieve the effect of strong selectivity, good stability, and low vanadium content

Active Publication Date: 2018-07-13
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the denitrification catalyst based on titania-supported cerium-zirconium vanadate is worthy of further development, but the denitrification catalyst based on titania-supported cerium-zirconium vanadate has not been reported yet.

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  • Titanium oxide supported cerium zirconium vanadate denitration catalyst, preparation method and application
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  • Titanium oxide supported cerium zirconium vanadate denitration catalyst, preparation method and application

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Embodiment 1

[0034] see figure 1 , the present embodiment provides a preparation method of titania-supported cerium-zirconium vanadate denitration catalyst, which comprises the following steps:

[0035] (1) prepare the solution of zirconium nitrate solution and cerium nitrate, mix after stirring, wherein the mol ratio of the metal zirconium element in the zirconium nitrate solution and the metal cerium element in the cerium nitrate solution is 0.15:0.85;

[0036] (2) Add the HNO that has fully used 16mol / L in the mixed solution that step (1) obtains 3 The ammonium metavanadate dissolved in the solution is uniformly stirred, wherein the molar ratio of metal vanadium in the vanadium salt to metal cerium in the cerium salt is 1:0.85;

[0037] (3) add TiO in the mixed solution that step (2) obtains 2 Carrier, stirring and impregnating;

[0038] (4) drying the mixed solution obtained in step (3) at 80° C. for 16 hours to obtain a precursor of titania-supported cerium-zirconium vanadate denit...

Embodiment 2

[0045] see figure 2 , the present embodiment provides a preparation method of titania-supported cerium-zirconium vanadate denitration catalyst, which comprises the following steps:

[0046] (1) prepare the solution of zirconium nitrate solution and cerium nitrate, mix after stirring, wherein the mol ratio of the metal zirconium element in the zirconium nitrate solution and the metal cerium element of the cerium nitrate solution is 0.15:0.85;

[0047] (2) Add the HNO that has fully used 16mol / L in the mixed solution that step (1) obtains 3 The ammonium metavanadate dissolved in the solution is uniformly stirred, wherein the molar ratio of metal vanadium in the vanadium salt to metal cerium in the cerium salt is 1:0.85;

[0048] (3) add TiO in the mixed solution that step (2) obtains 2 Carrier, stirring and impregnating;

[0049] (4) drying the mixed solution obtained in step (3) at 100° C. for 12 hours to obtain a precursor of titania-supported cerium-zirconium vanadate den...

Embodiment 3

[0056] This embodiment provides a preparation method of the above-mentioned titania-supported cerium-zirconium vanadate denitration catalyst, which includes the following steps:

[0057] (1) prepare the solution of zirconium chloride solution and cerium chloride, mix after stirring, wherein the mol ratio of the metal zirconium element in the zirconium chloride solution and the metal cerium element of the cerium chloride solution is 0.20:0.80;

[0058] (2) in the mixed solution that step (1) obtains, add the sodium metavanadate fully dissolved with the HCl solution of 12mol / L, stir evenly, wherein the mol ratio of metal vanadium in the vanadium salt and metal cerium in the cerium salt is 1 :0.80;

[0059] (3) add TiO in the mixed solution that step (2) obtains 2 Carrier, stirring and impregnating;

[0060] (4) drying the mixed solution obtained in step (3) at 120° C. for 10 h to obtain a precursor of titania-supported cerium-zirconium vanadate denitration catalyst;

[0061] ...

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Abstract

The invention discloses a titanium oxide supported cerium zirconium vanadate denitration catalyst, a preparation method and an application. The denitration catalyst is composed of TiO2 as a carrier and cerium zirconium vanadate active components supported on the carrier. The invention also discloses a preparation method and application of a titanium oxide supported cerium zirconium vanadate denitration catalyst. The catalyst is prepared by an impregnation method, and 1-16 wt % of cerium zirconium vanadate is supported on titanium oxide based on the mass of TiO 2 as 100 wt %. The catalyst of the invention has the advantages of good thermal stability, excellent anti-H2O and anti-SO2 poisoning performance, wide operating temperature window, simple preparation process, low cost, etc., and is suitable for the treatment of nitrogen oxides in various exhaust gases, and is suitable for practical applications.

Description

technical field [0001] The invention relates to the field of chemical nano-catalysts, in particular to a titania-supported cerium-zirconium vanadate denitrification catalyst used for selective catalytic reduction of ammonia to purify nitrogen oxides in stationary sources and mobile sources, a 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 The harm is relatively large, mainly the formation of acid rain, global warming, photochemical smog, etc.; the direct harm to the human body is also relatively large, which can cause poisoning and pathological changes in the respiratory system and nervous system. Therefore, NO x Removal is an imminent matter. The selective catalytic reduction of ammonia (NH 3 -SCR) is currently the most widely used mainstream flue gas denitrification technology in the world. Under the action of catalyst,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01D53/90B01D53/56
Inventor 张登松黄垒施利毅赵欣李红蕊张剑平
Owner SHANGHAI UNIV
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