A kind of preparation method of low-temperature anti-sulfur denitrification catalyst

A technology of denitrification catalyst and catalyst carrier, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., and can solve problems such as deactivation and catalyst denitrification activity reduction

Inactive Publication Date: 2021-04-09
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But on SO 2 In the presence of

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of low-temperature anti-sulfur denitrification catalyst
  • A kind of preparation method of low-temperature anti-sulfur denitrification catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 0.05Fe-doped TiO 2 Supported iron-manganese composite oxide denitration catalyst

[0016] 20ml of butyl titanate and 70ml of absolute ethanol are mixed to prepare liquid A; 1.19g of ferric nitrate (Fe(NO 3 ) 3 9H 2 O) The solutions are mixed to prepare liquid B. Slowly drop liquid A into liquid B, heat it in a water bath at 60°C, stir and reflux, remove the reflux device after adding all liquid A, continue stirring to evaporate water, and make iron-titanium composite organic gel. Put the iron-titanium composite organogel at room temperature for 16 hours, then put it in a drying oven, and dry it at 120°C for 12 hours to obtain a dry glue, and put the dry glue in H 2 The catalyst carrier was obtained by keeping the temperature at 500° C. for 4 hours in an atmosphere sintering furnace. use N 2 The BET specific surface area of ​​the carrier measured by the adsorption-desorption method is 105.27m 2 / g.

[0017] Weigh 5g carrier, 3.62g Fe(NO 3 ) 3 9H 2 O ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of chemical industry, and is a preparation method of a low-temperature anti-sulfur denitrification catalyst. 2 The denitrification problem of flue gas, the catalyst of the present invention is doped iron modified TiO 2 Supported iron-manganese composite oxide catalyst, doped with iron and TiO 2 The molar ratio is 0.01:1~0.5:1, mixed by sol-gel method, and roasted in a reducing atmosphere to obtain a carrier, and the impregnation method is used to load 10% (mass ratio to the carrier, the same below) of Fe and 10 % Mn, the prepared denitration catalyst has a large specific surface area, high thermal stability, high denitration efficiency and good sulfur resistance, and is suitable for the catalyst containing a certain amount of SO 2 The field of nitrogen oxide removal in flue gas. The evaluation of simulated flue gas in the laboratory shows that when the air velocity is 30,000h ‑1 , NO 1000ppm and SO 2 Under the condition of 100ppm, in the range of 160~250℃, the removal rate of NO can reach more than 75%, and there is no SO 2 When it exists, the removal rate of NO at 160-250°C can reach more than 92%.

Description

Technical field: [0001] The invention belongs to the technical field of chemical industry, and relates to a preparation method of a low-temperature sulfur-resistant denitrification catalyst, in particular to a preparation method of a sulfur-resistant denitrification catalyst with a high specific surface area and an adjustable active component valence state. [0002] technical background: [0003] Nitrogen oxide (NOx) is an important pollutant, and its emission into the atmosphere will cause a series of environmental problems such as acid rain, photochemical smog, ozone layer thinning and global warming. Therefore, the governments of various countries have proposed strict limit values ​​for NOx in exhaust emissions. In the pollutant emission standards of various industries promulgated by my country after 2011, the emission limit value of NOx has dropped to 500mg / m 3 , even reduced to 200mg / m in special areas 3 . Therefore, NOx removal has become the primary problem of pollu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J37/02B01J37/08B01D53/86B01D53/56
CPCB01D53/8628B01J23/8892B01J37/0201B01J37/08
Inventor 陈红萍梁英华齐雪杨旭郭红霞
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products