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Vanadium-titanium catalyst as well as preparation method and application thereof

A catalyst, vanadium-titanium technology, which is applied in the field of vanadium-titanium catalyst and its preparation, can solve the problems that low-temperature activity needs to be further improved, is not suitable for large-scale popularization and use, and has complex components, achieves good low-temperature activity, improves catalytic activity, and widens temperature window effect

Pending Publication Date: 2021-05-28
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex composition, it is not suitable for large-scale promotion and use, and the low-temperature activity still needs to be further improved.

Method used

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  • Vanadium-titanium catalyst as well as preparation method and application thereof
  • Vanadium-titanium catalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0045] This embodiment provides a vanadium-titanium catalyst and a preparation method thereof, the vanadium-titanium catalyst comprising TiO 2 carrier, V 2 o 5 Active ingredients and MoO 3 Auxiliary, wherein, the V 2 o 5 Active ingredients and MoO 3 After the combination of additives, the TiO is loaded on the 2 support, with the TiO 2 The mass of the carrier is 100% in terms of the V 2 o 5 The mass of active ingredient is 2.5%, the MoO 3 The mass of auxiliary agent is 6%.

[0046] Described preparation method comprises the steps:

[0047] (1) according to above-mentioned proportioning weighing ammonium metavanadate as vanadium source and ammonium molybdate as molybdenum source, be 2:1 to weigh oxalic acid and be dissolved in 100mL deionized water according to the mol ratio of oxalic acid and ammonium metavanadate, then Add the weighed ammonium metavanadate and ammonium molybdate and mix uniformly to obtain the active component solution;

[0048] (2) Weigh TiO accor...

Embodiment 2

[0050] This embodiment provides a vanadium-titanium catalyst and a preparation method thereof, except that MoO in the vanadium-titanium catalyst 3 Replace with WO of equal quality 3 , correspondingly ammonium molybdate in the preparation method is replaced by ammonium metatungstate, other conditions are exactly the same as in Example 1, denoted as 2.5wt% V 2 o 5 -6wt% WO 3 / TiO 2 .

Embodiment 3

[0052] This embodiment provides a vanadium-titanium catalyst and a preparation method thereof, except that V in the vanadium-titanium catalyst 2 o 5 The mass percentage of MoO is replaced by 2.5% to 1.5%, MoO 3 The mass percent composition of is replaced by 6% by 10%, and the quality of ammonium metavanadate and ammonium molybdate in the preparation method is adjusted accordingly, other conditions are exactly the same as embodiment 1, denoted as 1.5wt% V 2 o 5 -10wt%MoO 3 / TiO 2 .

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Abstract

The invention relates to a vanadium-titanium catalyst and a preparation method and application thereof. The structural formula of the vanadium-titanium catalyst is V2O5-WO3 / TiO2 or V2O5-MoO3 / TiO2, and based on the fact that the mass of a TiO2 carrier is 100%, the mass of a V2O5 active component is 0.5-5%, and the mass of a WO3 or MoO3 auxiliary agent is 3-10%. The vanadium-titanium catalyst is based on common V2O5-WO3 / TiO2 or V2O5-MoO3 / TiO2, other elements are not added, and only the mass percentage content of the active components is optimized; a temperature window can be widened, and nitrogen oxide purification efficiency can reach 80% at an air speed of 50,000 / h and in a temperature range of 200-450 DEG C; and good low-temperature activity is achieved, and the catalytic activity of the catalyst within a temperature range of 150-250 DEG C is greatly improved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a vanadium-titanium catalyst and its preparation method and application. Background technique [0002] Nitrogen oxides (NO x ) is one of the main pollutants in the atmosphere today, which can cause major environmental problems such as haze, acid rain and photochemical smog. Therefore, controlling NO x Emissions are a major challenge in the field of environmental protection. Currently, under oxygen-enriched conditions, the NH 3 Selective Catalytic Reduction of NO as Reductant x Generate non-toxic and harmless N 2 and H 2 O, that is NH 3 -SCR technology is to remove fixed source NO x and mobile source NO x One of the most effective techniques. Among them, NH 3 -The key to SCR technology is the catalyst, mainly TiO 2 as the carrier, with V 2 o 5 It is a vanadium-titanium catalyst with active components, and is widely used in coal-fired power plants, industrial boiler...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J23/28B01D53/86B01D53/56
CPCB01J23/30B01J23/28B01D53/8628B01D2255/20707B01D2255/20723B01D2255/20776B01D2255/20769
Inventor 贺泓吕智慧余运波石晓燕
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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