Supported manganese-based medium-and-low-temperature denitration catalyst and preparation method and application thereof

A supported manganese-based, low-temperature denitrification technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor low-temperature activity in manganese-based denitrification catalysts

Active Publication Date: 2020-02-11
SICHUAN UNIV +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a supported manganese-based medium-low temperature denitrification catalyst, preparation method and application thereof, which has excellent low-temperature catalytic denitrification and medium-low temperature reaction performance, and a wide operating temperature window; it can be applied to flue gas denitrification, To solve the problem of poor activity of manganese-based denitration catalysts at medium and low temperatures in the existing flue gas SCR denitration catalyst technology

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
  • Supported manganese-based medium-and-low-temperature denitration catalyst and preparation method and application thereof
  • Supported manganese-based medium-and-low-temperature denitration catalyst and preparation method and application thereof
  • Supported manganese-based medium-and-low-temperature denitration catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The sample of supported manganese-based low-temperature denitration catalyst in this embodiment was prepared by the following steps:

[0053] (1) Impregnation: Weigh 1.01g of manganese acetate and dissolve it in 8mL of deionized water, add 2.4g of carrier titanium dioxide, stir at room temperature for 6h, mix evenly, transfer to an oven at 80°C for 12h, grind to powder, and obtain bivalent The initial sample of manganese salt;

[0054] (2) Grinding and mixing and solid-phase interface reaction: add potassium permanganate solid to the initial sample of divalent manganese salt, and carry out sufficient grinding and mixing and solid-phase interface reaction for 20 minutes to obtain a manganese-containing precursor; wherein, potassium permanganate The molar ratio of Mn to the divalent manganese salt is 1:5, and the total mass of the divalent manganese salt and potassium permanganate is 27% of the mass of the carrier.

[0055] (3) Aging: Aging the manganese-containing precu...

Embodiment 2

[0060] The sample of supported manganese-based low-temperature denitration catalyst in this embodiment was prepared by the following steps:

[0061] (1) Impregnation: Weigh 0.51g of manganese acetate and dissolve it in 8mL of deionized water, add 2.7g of carrier titanium dioxide, stir at room temperature for 6h, mix evenly, transfer to an oven at 80°C for 12h, grind to powder, and obtain divalent The initial sample of manganese salt;

[0062] (2) Grinding and mixing and solid-phase interface reaction: add potassium permanganate solid to the initial sample of divalent manganese salt, and carry out sufficient grinding and mixing and solid-phase interface reaction for 20 minutes to obtain a manganese-containing precursor; wherein, potassium permanganate The molar ratio of Mn to the divalent manganese salt is 2:3, and the total mass of the divalent manganese salt and potassium permanganate is 60% of the mass of the carrier.

[0063] (3) Aging: aging the manganese-containing precu...

Embodiment 3

[0069] The sample of supported manganese-based medium-low temperature denitration catalyst in this example was prepared by the following steps:

[0070] (1) Impregnation: Weigh 0.05g of manganese acetate and dissolve it in 8mL of deionized water, and add carrier γ-Al 2 o 3 2.97 g was stirred at room temperature for 6 hours to mix evenly, then transferred to an oven at 80°C to dry for 12 hours, and then ground to powder to obtain the initial sample of divalent manganese salt;

[0071] (2) Grinding and mixing and solid-phase interface reaction: add potassium permanganate solid to the initial sample of divalent manganese salt, and carry out sufficient grinding and mixing and solid-phase interface reaction for 20 minutes to obtain a manganese-containing precursor; wherein, potassium permanganate The molar ratio of Mn to the divalent manganese salt is 2:3, and the total mass of the divalent manganese salt and potassium permanganate is 2% of the mass of the carrier.

[0072] (3) ...

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
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a supported manganese-based medium-and-low-temperature denitration catalyst, and preparation and application thereof, belonging to the technical field of environment-friendly catalytic materials. The catalyst is prepared by adding a carrier titanium dioxide or aluminum oxide into a divalent manganese salt solution, then carrying out stirring, mixing and drying, adding potassium permanganate, and carrying out a solid-phase interface reaction. The denitration catalyst provided by the invention is used for a selective catalytic reduction denitration reaction; the catalysthas obviously-enhanced low-temperature (100-200 DEG C) or medium-and-low-temperature (200-300 DEG C) catalytic activity; the catalyst has excellent low-temperature denitration performance in the caseof a high loading amount, and a typical sample allows the conversion rate of NO in mixed gas to reach 98.7% at 100 DEG C and to reach 98.9% at 200 DEG C under the condition of an air speed of 30,000 ml/g.h; and the catalyst has excellent medium-temperature denitration performance in the case of a low loading amount, and a typical sample allows the conversion rate of NO in mixed gas to reach 99.0%at 200 DEG C and to reach 99.6% at 300 DEG C under the condition of an air speed of 60,000 ml/g.h. The denitration catalyst provided by the invention has a potential application value.

Description

technical field [0001] The invention relates to the technical field of environment-friendly catalytic materials, in particular to a supported manganese-based medium-low temperature denitrification catalyst, a preparation method and an application thereof. Background technique [0002] In recent years, the state has paid more and more attention to environmental protection and environmental governance, and has achieved stricter control over the discharge of pollutants. Among them, NOx is a kind of air pollutant that produces great pollution. The main source is boiler exhaust gas, nitrification plant exhaust gas, etc. In particular, coal-fired power generation still occupies an absolute dominant position in my country, producing a large amount of exhaust gas containing NOx. Selective Catalytic Reduction (SCR), the most widely used denitrification method at present, uses a reducing agent to reduce NOx to N that is harmless to the atmosphere. 2 . Common reducing agents are hydr...

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): B01J23/34B01J37/08B01D53/86B01D53/56
CPCB01J23/34B01J23/002B01J37/088B01D53/8628B01D2258/0283B01D2257/404B01D2258/02
Inventor 储伟康辉叶简
Owner SICHUAN UNIV
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap