Vanadium-free denitration catalyst and preparation method thereof

A denitration catalyst, a technology of chemical composition, applied in chemical instruments and methods, chemical elements of heterogeneous catalysts, catalysts for physical/chemical processes, etc., to achieve the effects of simple production process, high catalytic performance and low cost

Inactive Publication Date: 2018-11-06
杭州同久净颢科技有限责任公司
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the doped active component CeO 2 The formation of composite oxides improves the catalytic performance of the denitration catalyst, but its mai...

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
  • Vanadium-free denitration catalyst and preparation method thereof
  • Vanadium-free denitration catalyst and preparation method thereof
  • Vanadium-free denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Dissolve cerium nitrate (0.3907g), manganese nitrate (12.55mg) and cobalt nitrate (14.55mg) in (20mL) water, where Ce 3+ with Co 2+ , Mn 2+ The molar ratio of the mixture was 18:1:1, stirred at 800rpm at room temperature for 30min to make it evenly mixed. Dissolve biphenyldicarboxylic acid (0.242g) in (10mL) ethanol, mix the two solutions, heat in an oil bath at 70°C, use sodium hydroxide as a regulator, adjust the pH of the solution to 4, and keep the temperature constant for 2h. The chelation reaction product was centrifuged and dried, and dried in an oven at 60°C. The dried sample was placed in a muffle furnace and sintered at 600°C for 2 hours. The obtained vanadium-free denitration catalyst was a Co and Mn-doped CeO 2 Composite oxide catalyst, its SEM such as figure 1 As shown, the XRD pattern is as figure 2 As shown, the yield was 83%.

[0036] Depend on Figure 1-2 It can be seen that the impurity elements in the obtained doped oxide are uniformly doped in...

Embodiment 2

[0040] Dissolve cerium nitrate (0.3038g) and manganese nitrate (75mg) in 10ml of water, where Ce 3+ with Mn 2+ The molar ratio of the mixture was 7:3, stirred at 500rpm at room temperature for 30min to make it evenly mixed. Dissolve 0.166g of phthalic acid in (30ml) ethanol, mix the two solutions, heat in an oil bath at 50°C, use sodium hydroxide as a pH regulator, adjust the pH of the solution to 3, and keep the temperature constant for 2h. The chelation reaction product was centrifuged and dried in an oven at 60°C, and the dried sample was placed in a muffle furnace and sintered at 400°C for 4h to obtain Mn / CeO 2 Composite vanadium-free denitration catalyst with a yield of 70%. The denitration efficiency of the denitration catalyst prepared in the embodiment of the present invention is 90%.

Embodiment 3

[0042] Dissolve cerium nitrate (0.3472g) and cobalt nitrate (58.2mg) in 10ml of water, where Ce 3+ with Co 2+ The molar ratio of the mixture was 8:2, stirred at 800rpm at room temperature for 30min to make it evenly mixed. Dissolve 0.166g of phthalic acid in 40ml of ethanol, mix the two solutions, heat in an oil bath at 50°C, use sodium hydroxide as a regulator, adjust the pH of the solution to 4, and keep the temperature constant for 2h. The reactant was centrifuged and dried in an oven at 60°C, and the dried sample was placed in a muffle furnace and sintered at 500°C for 3 hours to obtain Co / CeO 2 Composite vanadium-free denitration catalyst with a yield of 80%. The denitration efficiency of the denitration catalyst prepared in the embodiment of the present invention is 80%.

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

No PUM Login to view more

Abstract

The invention discloses a vanadium-free denitration catalyst, wherein a CeO2 nanosheet is used as a matrix, and transition metal elements are uniformly incorporated into a CeO2 lattice. A preparationmethod of the vanadium-free denitration catalyst is further disclosed. The method includes: conducting chelation reaction in a water and ethanol mixed solution with cerium oxide as a main body, the transition metal elements as a dopant, a common alkali metal solution as a regulator and phthalic acid, biphenyldicarbox ylic acid, trimesic acid, pyromellitic acid or the like as a ligand; drying a product of the chelation reaction, calcining the product for 2-5h at the temperature of 400-700DEG C to obtain the vanadium-free denitration catalyst. The method has the advantages of being simple in production process, capable of obtaining raw materials easily and easy to industrialize, adopting non-toxic harmless components and being harmless to the environment and human health. The vanadium-free denitration catalyst prepared by the method has wide catalytic activity temperature window and high catalytic efficiency, and can be used for denitration of both fixed source industry and mobile sourceexhaust gas.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a vanadium-free denitration catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxide NO x It is one of the important pollutants of air pollution, and its existence will cause major problems such as photochemical smog, acid rain, and greenhouse effect. NO x The main source is the combustion of chemical fuels, including coal-fired power plants, industrial boilers, motor vehicle exhaust, steel and cement plants, etc., of which coal-fired power plants NO x Emissions accounted for my country's NO x more than half of the total emissions. [0003] Current denitrification technologies include selective catalytic reduction (SCR), selective non-catalytic reduction (SNCR), and low-nitrogen combustion. Among them, selective catalytic reduction (SCR) denitrification technology is the most efficient, mature and widely used exhaust g...

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
IPC IPC(8): B01J23/34B01J23/83B01J23/889B01J35/02B01D53/56B01D53/90B01D53/94
CPCB01D53/8628B01D53/90B01D53/9418B01J23/002B01J23/34B01J23/83B01J23/8892B01J35/023B01J2523/00B01J2523/845B01J2523/72B01J2523/3712B01J2523/847B01J2523/17Y02P20/30
Inventor 孙维林岳艳孙启杭凌君
Owner 杭州同久净颢科技有限责任公司
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