SCR (Selective Catalytic Reduction) catalyst and preparation method thereof

A SCR catalyst, RP-CHOP technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as low compressive strength, poor mechanical properties of catalysts, energy waste, etc., and achieve excellent low-temperature catalysis active effect

Inactive Publication Date: 2014-12-24
江苏宇达环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalysts widely used in this area are vanadium-titanium catalysts (V 2 o 5 / TiO 2 , V 2 o 5 -WO 3 / TiO 2 ), the activation temperature is 250-450°C, but there are many problems in the application of this type of catalyst, mainly in the poor mechanical properties of the catalyst, low compressive strength, and unnecessary waste of energy due to high activation temperature

Method used

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  • SCR (Selective Catalytic Reduction) catalyst and preparation method thereof
  • SCR (Selective Catalytic Reduction) catalyst and preparation method thereof
  • SCR (Selective Catalytic Reduction) catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of SCR catalyst, by weight, it is prepared from following raw material: 90 parts of TiO 2 , 4 copies of WO 3 , 2 copies of V 2 o 5 , 6 parts of glass fiber, 8 parts of ammonia water, 8 parts of CMC, 50 parts of ionized water and 6 parts of RP-CHOP functional fiber.

[0021] The specific preparation method is as follows:

[0022] 1) The raw materials are mixed according to the stated ratio, and then stored for 40 hours;

[0023] 2) Pre-extrude the rotted material in step 1), and then enter the molding machine for molding;

[0024] 3) The formed product is dried once and twice until the moisture content reaches 5%, and then enters the kiln and is calcined at 620°C for 12 hours;

[0025] 4) Cutting, grading and packing the products burnt in step 3) and putting them into storage.

[0026] The honeycomb-type catalyst unit body prepared in this embodiment is measured and calculated: length 801mm, inner wall thickness 1.05mm, outer wall thickness 2.24mm, pore diam...

Embodiment 2

[0028] A kind of SCR catalyst, by weight, it is prepared from following raw material: 85 parts of TiO 2 , 5 copies of WO 3 , 1 copy of V 2 o 5 , 8 parts of glass fiber, 5 parts of ammonia water, 8 parts of CMC, 50 parts of ionized water and 6 parts of RP-CHOP functional fiber.

[0029] The specific preparation method is as follows:

[0030] 1) The raw materials are mixed according to the stated ratio, and then stored for 50 hours;

[0031] 2) Pre-extrude the rotted material in step 1), and then enter the molding machine for molding;

[0032] 3) The formed product is dried once and twice until the moisture content reaches 5%, and then enters the kiln and is calcined at 620°C for 12 hours;

[0033] 4) Cutting, grading and packing the products burnt in step 3) and putting them into storage.

Embodiment 3

[0035] A kind of SCR catalyst, by weight, it is prepared from following raw material: 95 parts of TiO 2 , 3 copies of WO 3 , 3 copies of V 2 o 5 , 5 parts of glass fiber, 10 parts of ammonia water, 8 parts of CMC, 50 parts of ionized water and 6 parts of RP-CHOP functional fiber.

[0036] The specific preparation method is as follows:

[0037] 1) The raw materials are mixed according to the stated ratio, and then stored for 50 hours;

[0038] 2) Pre-extrude the rotted material in step 1), and then enter the molding machine for molding;

[0039] 3) The formed product is dried once and twice until the moisture content reaches 5%, and then enters the kiln and is calcined at 620°C for 12 hours;

[0040] 4) Cutting, grading and packing the products burnt in step 3) and putting them into storage.

[0041] Effect experiment example

[0042] Carry out activity, SO with the catalyst prepared by the embodiment of the present invention as test sample 2 / SO 3 The detection of con...

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Abstract

The invention provides an SCR (Selective Catalytic Reduction) catalyst which is prepared from the following raw materials in parts by weight: 85-95 parts of TiO2, 3-5 parts of WO3, 1-3 parts of V2O5, 5-8 parts of glass fibers, 5-10 parts of ammonia water, 8 parts of CMC, 50 parts of ionized water and 6 parts of RP-CHOP functional fibers. The catalyst provided by the invention has the characteristics of high low-temperature activity and high denitration efficiency and also has excellent compressive property and wear resistance. The invention also provides a method for preparing the catalyst.

Description

technical field [0001] The invention relates to an industrial catalyst, in particular to a denitration catalyst in SCR, especially a vanadium-titanium catalyst, and a preparation method thereof. Background technique [0002] Nitrogen oxides are one of the main air pollutants and the main cause of acid rain and photochemical smog. They also play an important role in the aggravation of the greenhouse effect and the destruction of the ozone layer. The current flue gas purification technology, that is, the technology for removing nitrogen oxides in flue gas, mainly includes wet denitrification, catalytic decomposition method, solid adsorption method, liquid absorption method, plasma activation method, microbial method, selective non-catalytic Reduction and Selective Catalytic Reduction (SCR), etc. Among them, SCR is considered to be the best flue gas denitrification technology, and its application is the most widely. This technology mainly uses ammonia and other reducing agents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01D53/86B01D53/56
Inventor 唐虎戴寅戴宇
Owner 江苏宇达环保科技股份有限公司
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