Unlock instant, AI-driven research and patent intelligence for your innovation.

Samarium-doped manganese low-temperature denitration catalyst and preparation method and application thereof

A denitration catalyst and low-temperature denitration technology, applied in the field of denitration, can solve the problems of poor low-temperature activity of the denitration catalyst and the like

Inactive Publication Date: 2021-01-15
SICHUAN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a samarium-doped manganese-based low-temperature denitrification catalyst and its preparation method and application, so as to solve the technical problem of poor low-temperature activity of denitrification catalysts in the prior art

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
  • Samarium-doped manganese low-temperature denitration catalyst and preparation method and application thereof
  • Samarium-doped manganese low-temperature denitration catalyst and preparation method and application thereof
  • Samarium-doped manganese low-temperature denitration catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation method of the samarium-doped manganese-based low-temperature denitration catalyst is as follows:

[0044] (1) The raw material is TiO 2 , Mn(CH 3 COO) 2 4H 2 O, Fe(NO 3 ) 3 9H 2 O and Sm(NO 3 ) 3 , the mass of the active ingredient according to Sm 2 o 3 , MnO 2 and Fe 2 o 3 Calculated, according to the mass of the active component for the denitration catalyst (i.e. TiO 2 and the total mass of the active components) and the molar ratio of Sm:Mn:Fe is 0.1:1:1 to weigh the raw materials.

[0045] (2) Precipitation is obtained by deposition and precipitation method, specifically: Mn(CH 3 COO) 2 4H 2 O, Fe(NO 3 ) 3 9H 2 O and Sm(NO 3 ) 3 Dissolve in 100mL distilled water, then add TiO 2 and stirred for 30 minutes, then dropwise added 1.5mol / L (NH 4 ) 2 CO 3 The solution was adjusted to a pH of 8.4, and then continued to stir for 2 hours, and then filtered, washed, and dried to obtain a precipitate.

[0046] (3) Calcinate the precipit...

Embodiment 2

[0048] The only difference from Example 1 is that the theoretically calculated molar ratio of Sm:Mn:Fe is 0.3:1:1. The raw materials are weighed, and the final denitration catalyst is named Sm-Mn-Fe / TiO 2 -0.3 or Sm-Mn-Fe / TiO 2 -450.

Embodiment 3

[0050] The only difference from Example 1 is that the molar ratio of Sm:Mn:Fe obtained according to the theoretical calculation is 0.5:1:1 and the raw materials are weighed, and the final denitration catalyst obtained is named Sm-Mn-Fe / TiO 2 -0.5.

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
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a samarium-doped manganese low-temperature denitration catalyst and a preparation method and application thereof. The samarium-doped manganese low-temperature denitration catalyst comprises a carrier and an active component, the carrier is TiO2, and the active component is oxides of Fe, Mn and Sm. The preparation method of the samarium-doped manganese low-temperature denitration catalyst comprises the following steps: (1) taking TiO2, soluble salt of Sm, soluble salt of Mn and soluble salt of Fe as raw materials, and obtaining precipitate by adopting a deposition-precipitation method; and (2) washing, drying and calcining the precipitate to obtain the samarium-doped manganese low-temperature denitration catalyst. According to the denitration method, the denitrationcatalyst is adopted, or the denitration catalyst is prepared by adopting the preparation method. According to the denitration catalyst disclosed by the invention, TiO2 is used as a carrier, and metal-doped oxides are uniformly distributed on the surface of TiO2, so that the denitration activity can be fully exerted, excellent low-temperature denitration activity is shown, and the denitration catalyst is very suitable for denitration treatment on NOx in low-temperature flue gas discharged by non-electric industries in China.

Description

technical field [0001] The invention relates to the technical field of denitrification, in particular to a samarium-doped manganese-based low-temperature denitrification catalyst and a preparation method and application thereof. Background technique [0002] Nitrogen oxides (NOx) are one of the main precursors of regional air pollution such as PM2.5, photochemical smog and acid rain. NH 3 -SCR denitrification is the mainstream technology for treating NOx in flue gas, and the core of this technology is the denitrification catalyst. The active temperature window of the vanadium-tungsten-titanium denitrification catalyst used in the flue gas denitrification system of coal-fired power plant boilers is generally 300-400 °C. However, the flue gas emission temperature of non-electric industries such as iron and steel, sintering, and cement is generally lower than 280°C, and it will be difficult to use vanadium-tungsten-titanium denitrification catalysts to exert the best activity...

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 Applications(China)
IPC IPC(8): B01J23/889B01J35/10B01J37/03B01D53/86B01D53/56
CPCB01J23/8892B01J23/002B01J37/031B01D53/8628B01J2523/00B01D2258/0283B01J35/613B01J35/615B01J35/633B01J35/647B01J2523/3737B01J2523/47B01J2523/72B01J2523/842
Inventor 刘勇军高杰郭家秀李建军楚英豪岑望来罗德明
Owner SICHUAN UNIV