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Gas-phase cerium titanium sulfide supported tin oxide catalyst and preparation method and application thereof

A tin oxide and catalyst technology, which is applied in the field of gas-phase cerium sulfide titanium-supported tin oxide catalyst and its preparation, can solve the problems of poor mechanical strength and small specific surface area, and achieve good thermal stability, large specific surface area, and simple and quick operation Effect

Pending Publication Date: 2021-10-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above-mentioned problems existing in the prior art, the object of the present invention is to provide a kind of gas-phase cerium sulfide-titanium supported tin oxide catalyst and its preparation method and application, effectively solve the mechanical strength difference that existing catalyst exists, specific surface area is less, Easy to crystallize into rutile TiO at high temperature 2 And other issues

Method used

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  • Gas-phase cerium titanium sulfide supported tin oxide catalyst and preparation method and application thereof
  • Gas-phase cerium titanium sulfide supported tin oxide catalyst and preparation method and application thereof
  • Gas-phase cerium titanium sulfide supported tin oxide catalyst and preparation method and application thereof

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Effect test

Embodiment 1

[0033] Preparation of Ce-Ti Solid Solution Support

[0034] Dissolve 9.02g of titanium sulfate and 0.82g of cerium nitrate in 200mL of ultrapure water, stir magnetically at room temperature for 30min to mix evenly, then add 25wt.% ammonia water drop by drop, adjust to pH = 10, stir and age in a constant temperature oil bath at 90°C for 3h , filter the obtained precipitate with suction, fully wash with ultrapure water until pH = 7, dry in an electric blast drying oven at 80°C for 12 hours, cool, grind, and heat up to 550°C in an air atmosphere at a heating rate of 2°C / min Calcined for 5h to obtain Ce-Ti solid solution carrier.

[0035] Preparation of Sn / Ce-Ti Catalyst

[0036] Add 1g Ce-Ti solid solution support to 28.25mL 0.02mol L -1 In the tin chloride solution, stir magnetically for 30 minutes to make it fully mixed, stir in a constant temperature oil bath at 90°C until the solution is evaporated to dryness, dry in an electric blast drying oven at 80°C for 12 hours, cool,...

Embodiment 2

[0040] Preparation of Sn / Ce-Ti-50S Catalyst

[0041] The method of implementation 1 was used to prepare Ce-Ti solid solution carrier and Sn / Ce-Ti catalyst in sequence.

[0042] The prepared Sn / Ce-Ti catalyst was immobilized in the quartz tube in the heating furnace area of ​​the SCR catalytic reaction platform, under N 2 Under the atmosphere, the temperature was raised from room temperature to 200 °C at a rate of 10 °C / min, and kept for 30 min, and the N 2 . Feed 50ppm SO 2 30min, close SO 2 , into N 2 1h, down to room temperature, the Sn / Ce-Ti-50S catalyst is obtained.

Embodiment 3

[0044] Preparation of Sn / Ce-Ti-100S Catalyst

[0045] The method of implementation 1 was used to prepare Ce-Ti solid solution carrier and Sn / Ce-Ti catalyst in sequence.

[0046] The Sn / Ce-Ti catalyst was immobilized in the quartz tube in the heating furnace area of ​​the SCR catalytic reaction platform, under N 2 Under the atmosphere, the temperature was raised from room temperature to 200 °C at a rate of 10 °C / min, and kept for 30 min, and the N 2 . Feed 100ppm SO 2 30min, close SO 2 , into N 2 1h, down to room temperature, the Sn / Ce-Ti-100S catalyst is obtained.

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Abstract

The invention belongs to the field of flue gas denitration catalysts, and particularly relates to a gas-phase cerium titanium sulfide supported tin oxide catalyst and a preparation method and application thereof. The invention discloses a preparation method of a gas-phase cerium-titanium sulfide supported tin oxide catalyst. The preparation method comprises the following steps: (1) preparing a cerium-titanium solid solution carrier; (2) preparing a cerium-titanium supported tin oxide catalyst; and (3) preparing the gas-phase cerium titanium sulfide supported tin oxide catalyst. The prepared catalyst is large in specific surface area and good in thermal stability, and shows excellent catalytic performance, water resistance and sulfur resistance in NH3-SCR catalysis.

Description

technical field [0001] The invention relates to the field of flue gas denitrification catalysts, in particular to a gas phase cerium sulfide titanium supported tin oxide catalyst and its preparation method and application. Background technique [0002] The burning of a large amount of fossil fuels in production and life has caused increasingly serious nitrogen oxide pollution, and nitrogen oxides will cause serious harm to the living environment and human health. Therefore, the control of nitrogen oxides is urgent. [0003] The most widely used nitrogen oxide treatment technology is NH 3 Selective Catalytic Reduction of NO as Reductant x technology (i.e. NH 3 -SCR technology). NH for industrial applications 3 -SCR catalyst is mainly V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 catalyst, but the anatase TiO 2 There are also some problems in the use of the carrier, such as poor mechanical strength, small specific surface area, and easy crystallization into rutile TiO at high tempera...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/02B01J35/10B01D53/86B01D53/56
CPCB01J27/04B01D53/8628B01D2258/0283B01J35/50B01J35/40B01J35/613B01J35/615B01J35/647
Inventor 齐蕾孙振国杨涛黄太仲
Owner UNIV OF JINAN
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