High-performance vanadium, cerium and titanium composite oxide catalyst for flue gas denitration and preparation method thereof

A composite oxide and catalyst technology, which is applied in the direction of physical/chemical process catalysts, heterogeneous catalyst chemical elements, chemical instruments and methods, etc., can solve the problems of poor mechanical strength and small specific surface area, and achieve good thermal stability, The effects of high denitrification performance, excellent denitrification activity and water and sulfur resistance

Inactive Publication Date: 2016-06-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the anatase TiO in this catalyst 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 temperature. 2

Method used

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  • High-performance vanadium, cerium and titanium composite oxide catalyst for flue gas denitration and preparation method thereof
  • High-performance vanadium, cerium and titanium composite oxide catalyst for flue gas denitration and preparation method thereof
  • High-performance vanadium, cerium and titanium composite oxide catalyst for flue gas denitration and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1. Preparation of cerium-titanium solid solution carrier

[0023] Disperse 20mL of tetra-n-butyl titanate and 0.62g of cerium nitrate in 20mL of absolute ethanol, add 18.08g of urea, and after magnetically stirring for 30min, transfer the mixed solution to a polytetrafluoroethylene-lined high-pressure reactor. o C water heating for 10h, then the reaction kettle was cooled to room temperature, and the sample was centrifugally washed, 110 o C drying 12h, grinding, 550 under air atmosphere in a tube furnace o C is calcined for 6 hours to obtain a cerium-titanium solid solution carrier, which is marked as CeTi. Its specific surface area test results are shown in Table 1, and its XRD measurement results are shown in Table 1. figure 1 , the denitrification performance test results are shown in figure 2 .

[0024]

Embodiment 2

[0025] Example 2.V 1 Preparation of CeTi catalyst

[0026] Mix 1g of CeTi with 10mL of ultrapure water, stir for 30min, add 1.11mL of 0.1mol·L -1 Ammonium metavanadate solution, continue to stir for 30min, at 90 o Stir and evaporate to dryness in a C oil bath; put the sample at 120 o C drying 12h, grinding, 500 under air atmosphere in a tube furnace o C was calcined for 5h, and the obtained vanadium-cerium-titanium composite oxide catalyst was marked as V 1 CeTi. Its specific surface area test results are shown in Table 1, and its XRD measurement results are shown in Table 1. figure 1 , the denitrification performance test results are shown in figure 2 .

Embodiment 3

[0027] Example 3.V 3 Preparation of CeTi catalyst

[0028] Mix 1 g of CeTi with 10 mL of ultrapure water, stir for 30 min, add 3.40 mL of 0.1 mol L -1 Ammonium metavanadate solution, continue to stir for 30min, at 90 o Stir and evaporate to dryness in a C oil bath; put the sample at 120 o C drying 12h, grinding, 500 under air atmosphere in a tube furnace o C was calcined for 5h, and the obtained vanadium-cerium-titanium composite oxide catalyst was marked as V 3 CeTi. Its specific surface area test results are shown in Table 1, and its XRD measurement results are shown in Table 1. figure 1 , the denitrification performance test results are shown in figure 2 .

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Abstract

The invention discloses a vanadium, cerium and titanium composite oxide catalyst and a preparation method thereof.The main component of a carrier of the vanadium cerium and titanium composite oxide catalyst is a cerium and titanium solid solution, vanadium pentoxide is loaded to the surface of the cerium and titanium solution mainly in a high-dispersion mode, and the specific surface area is 10-105 m<2>.g<-1>.The vanadium, cerium and titanium composite oxide catalyst has the advantages of being large in specific surface area, high in thermal stability and the like.The vanadium, cerium and titanium composite oxide catalyst has high activity and selectivity in NH3 selective catalytic reduction NO reaction, is superior in water resisting and sulphur resisting performance, and has potential application value in the field of denitration.

Description

technical field [0001] The invention relates to a vanadium-cerium-titanium composite oxide catalyst for flue gas denitrification and a preparation method thereof. Background technique [0002] The rapid development of industry requires huge energy consumption. Under the energy structure dominated by coal in my country, the smoke emitted by coal combustion has caused serious pollution to the environment, and the environmental pollution caused by nitrogen oxides (NOx) is particularly serious. , its governance is urgent. In NOx emission control technology, NH 3 Selective catalytic reduction of NOx (i.e. NH 3 -SCR technology), is the most effective method for flue gas denitrification in coal-fired power plants. [0003] Currently, NH for industrial applications 3 -SCR catalyst is mainly V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 Catalyst, the catalyst is characterized in that the NOx removal efficiency in coal-fired boiler power plants is above 80%, and it has good sulfur resistance p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01D53/90B01D53/56
CPCB01J23/002B01D53/8628B01D53/90B01J23/22B01J35/1014B01J35/1019B01J2523/00
Inventor 齐蕾汤琦武笑颖
Owner UNIV OF JINAN
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