Cerium and titanium supported vanadium catalyst, and preparation method and use thereof

A catalyst, cerium-titanium technology, applied in the fields of cerium-titanium supported vanadium catalyst, preparation and application, can solve the problem of not mentioned anti-SO2 poisoning performance, etc., achieve excellent anti-SO2 poisoning performance, good NH3-SCR activity, active group highly dispersed effects

Active Publication Date: 2014-05-28
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, it only achieves the excellent low-temperature performance of the catalyst, and does not mention the anti-SO 2 Poisoning properties

Method used

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  • Cerium and titanium supported vanadium catalyst, and preparation method and use thereof
  • Cerium and titanium supported vanadium catalyst, and preparation method and use thereof
  • Cerium and titanium supported vanadium catalyst, and preparation method and use thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of cerium titanium loaded vanadium catalyst, described catalyst is made of Ce 1 Ti 1 o x carrier and the V loaded on the carrier 2 o 5 The active components consist of Ce 1 Ti 1 o x The mass of the carrier is 100wt%, and the V 2 o 5 Active ingredient The active ingredient was 2.8 wt%.

[0042] The preparation method of catalyst as described above comprises the steps:

[0043] (a) Using cerium nitrate as the Ce source, titanium sulfate as the Ti source, and urea as the precipitating agent, make a mixed solution of titanium sulfate and cerium nitrate, then add excess urea precipitant to it, and continuously stir under the condition of 90 °C water bath After 12 hours, the Ce and Ti ions were co-precipitated completely, and the precipitate was filtered and washed, and then the filter cake was dried in an oven at 100°C for 12h, and finally roasted in a muffle furnace at 400°C for 3h in an air atmosphere to obtain Ce 1 Ti 1 o x carrier;

[0044] (a) In the...

Embodiment 2

[0046] Except step (1) firing temperature is 500 ℃, other are the same as embodiment 1.

Embodiment 3

[0048] Except step (1) firing temperature is 600 ℃, other are the same as embodiment 1.

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Abstract

The invention discloses a cerium titanium supported vanadium catalyst. The catalyst is composed of a CeaTibOx support and a V2O5 active component supported on the support, a ratio of a:b is 0.5:1-2:1, and the weight of the V2O5 active component accounts for 1-10% (except 3%) of the weight of the CeaTibOx support. The NOx purifying efficiency of the catalyst is close to above 100% at 200-400DEG C, and the catalyst has a very good NH3-SCR activity, a greatly widened operation temperature window and an excellent SO2 poisoning resistance, and can be used for catalyzing the NOx purification in an NH3-SCR process.

Description

technical field [0001] The invention relates to a cerium-titanium supported vanadium catalyst, a preparation method and an application thereof. Background technique [0002] Currently in NH 3 Selective Catalytic Reduction of NO as Reductant x (NH 3 -SCR) The catalyst system used is mostly V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 And the corresponding improved system is widely used in coal-fired power plants, industrial boilers and other stationary source flue gas denitrification purification processes, and has high NO in the higher temperature range x Purification efficiency and anti-SO 2 Toxic properties. However, the catalyst system has a narrow operating temperature window, and the N 2 O is produced in large quantities and causes N 2 Selective decline, poor high temperature thermal stability and other disadvantages. Currently developed non-vanadium-based NH 3 -The SCR catalyst system mainly includes molecular sieve catalysts loaded with active components and oxide cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01D53/90B01D53/56
Inventor 贺泓连志华刘福东石晓燕
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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