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A kind of vanadium-titanium sulfide catalyst and its preparation method and application

A technology of titanium catalyst and vanadium sulfide, which is applied in the field of vanadium-titanium sulfide catalyst and its preparation, can solve the problems of decreased selectivity, narrow operating temperature window, complex catalyst components, etc., and achieve the effect of improving low-temperature activity and wide operating temperature window

Active Publication Date: 2021-10-08
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of catalyst system has the disadvantages of high vanadium loading, narrow operating temperature window, N 2 O is produced in large quantities and causes N 2 Disadvantages such as decreased selectivity
At the same time, because the catalyst system contains tungsten, a relatively expensive component, the catalyst components are complex and costly

Method used

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  • A kind of vanadium-titanium sulfide catalyst and its preparation method and application
  • A kind of vanadium-titanium sulfide catalyst and its preparation method and application
  • A kind of vanadium-titanium sulfide catalyst and its preparation method and application

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Embodiment 1

[0035] The vanadium-titanium sulfide catalyst of the present embodiment is made of sulfided TiO 2 is the carrier and the V loaded on the carrier 2 o 5 The active component consists of sulfurized TiO 2 The mass of the carrier is 100%, V 2 o 5 The mass of active ingredient is 1%.

[0036] The preparation method of described vanadium titanium sulfide catalyst comprises the steps:

[0037] 1) Dissolve ammonium sulfate in water, add TiO to the ammonium sulfate solution 2 The carrier was stirred ultrasonically for 1h, wherein ammonium sulfate and TiO 2 The mass ratio of the carrier is 8%, evaporated to dryness by a rotary evaporator at 60°C, dried in an oven at 100°C, and roasted in a muffle furnace at 300°C for 3 hours in an air atmosphere to obtain sulfide TiO 2 carrier;

[0038] 2) In the presence of oxalic acid, the sulfurized TiO obtained in step 1) 2 The carrier was added into the ammonium metavanadate solution and stirred ultrasonically for 1 hour, evaporated to dryn...

Embodiment 2

[0040] The difference between this embodiment and embodiment 1 is that V 2 o 5 The quality of active component is 3%, and all the other are identical with embodiment 1.

Embodiment 3

[0042] The difference between this embodiment and embodiment 1 is that ammonium sulfate and TiO 2 The mass ratio of the carrier is 8%, and the rest are the same as in Example 1.

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Abstract

The invention provides a vanadium-titanium sulfide catalyst as well as its preparation method and application. Vanadium titanium sulfide catalyst of the present invention, the carrier of described catalyst is the TiO of sulfide 2 , the active component is V loaded on the carrier 2 o 5 , with the sulfurized TiO 2 The mass of the carrier is 100% in terms of the V 2 o 5 The mass of the active component is 1-3%. Vanadium titanium sulfide catalyst of the present invention is in 200000h ‑1 The space velocity and the temperature range of 300-450°C have a NOx purification efficiency higher than 90%, and the operating temperature window is wide. The preparation method of the vanadium-titanium sulfide catalyst of the present invention is simple, and the low-temperature activity is improved by controlling the polymerization state of vanadium on the catalyst surface, and the prepared vanadium-titanium sulfide catalyst can be used for NH 3 ‑SCR process catalytic purification of NO x .

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a vanadium-titanium sulfide catalyst and a preparation method and application thereof. Background technique [0002] Nitrogen oxides (NO x ) can cause major environmental problems such as haze, acid rain and photochemical smog, and control NO x Emissions are a major challenge in the field of environmental protection. Currently, in NH 3 Selective Catalytic Reduction of NO as Reductant x (NH 3 -SCR) used catalyst system is mostly V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 And the corresponding improved system, this kind of catalyst system is widely used in coal-fired power plants, industrial boilers and other stationary source flue gas denitrification purification processes, and has high NO x Purification efficiency and anti-SO 2 Toxic properties. [0003] CN104226296A discloses a vanadium-based supported medium-temperature SCR catalyst, which uses titanium-zirconium oxide as a carri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01D53/56B01D53/86B01D53/90
CPCB01D53/8628B01D53/90B01J27/04
Inventor 贺泓连志华单文坡余运波何广智杨阳刘阔石晓燕晏子頔朱娜
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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