Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Denitration catalyst

A denitration catalyst and catalyst technology, applied in the field of denitration catalysts, can solve the problems of low N2 selectivity and poor tolerance at high temperature, and achieve the effects of high NOx conversion rate, good denitration effect, and strong water resistance and SO2 resistance.

Pending Publication Date: 2021-06-15
江苏美玛技术有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it also faces some obstacles: poor tolerance to H2O and SO2 toxicity and low N2 selectivity at high temperature, etc.
These problems have brought challenges to the industrial application of Mn-based catalysts.

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
  • Denitration catalyst
  • Denitration catalyst
  • Denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A denitration catalyst prepared by the following steps:

[0056] (1) Surface cleaning pretreatment with titanium foam as the base material: Surface cleaning treatment includes the following steps:

[0057] (a) Degreasing: 25wt.% sodium silicate, 20wt.% sodium hydroxide, 5wt.% sodium carbonate, temperature 65 o C, stir and wash for 7 minutes. (b) Pickling: 30wt.% nitric acid, 3% hydrofluoric acid, room temperature, 1min.

[0058] (c) Wash with water, rinse with deionized water.

[0059] (2) Put the pretreated foamed titanium in a hydrothermal reaction kettle, use nitrogen to evacuate the oxygen in the reaction kettle, the hydrothermal reaction solution is a mixture of hydrofluoric acid and malic acid, cool naturally, wash with water, Vacuum dry.

[0060] The hydrothermal parameters: at 180 o C for 12 hours, the hydrothermal reaction solution is 1wt.% HF and 0.3wt.% malic acid aqueous solution, and the hydrothermal solution accounts for 60% of the volume of the react...

Embodiment 2

[0071] A denitration catalyst prepared by the following steps:

[0072] (1) Surface cleaning pretreatment with titanium foam as the base material: Surface cleaning treatment includes the following steps:

[0073] (a) Degreasing: 25wt.% sodium silicate, 20wt.% sodium hydroxide, 5 wt.% sodium carbonate, temperature 65 o C, stir and wash for 7 minutes. (b) Pickling: 30wt.% nitric acid, 3% hydrofluoric acid, room temperature, 2min.

[0074] (c) Wash with water, rinse with deionized water.

[0075] (2) Put the pretreated foamed titanium in a hydrothermal reaction kettle, use nitrogen to evacuate the oxygen in the reaction kettle, the hydrothermal reaction solution is a mixture of hydrofluoric acid and malic acid, cool naturally, wash with water, Vacuum dry.

[0076] The hydrothermal parameters: at 200 o C for 18 hours, the hydrothermal reaction solution was 1.25wt.% HF and 0.4wt.% malic acid aqueous solution, and the hydrothermal solution accounted for 65% of the volume of the...

Embodiment 3

[0087] A denitration catalyst prepared by the following steps:

[0088] (1) Surface cleaning pretreatment with titanium foam as the base material: Surface cleaning treatment includes the following steps:

[0089] (a) Degreasing: 25wt.% sodium silicate, 20wt.% sodium hydroxide, 5 wt.% sodium carbonate, temperature 65 o C, stir and wash for 7 minutes. (b) Pickling: 30wt.% nitric acid, 3% hydrofluoric acid, room temperature, 2min.

[0090] (c) Wash with water, rinse with deionized water.

[0091] (2) Put the pretreated foamed titanium in a hydrothermal reaction kettle, use nitrogen to evacuate the oxygen in the reaction kettle, the hydrothermal reaction solution is a mixture of hydrofluoric acid and malic acid, cool naturally, wash with water, Vacuum dry.

[0092] The hydrothermal parameters: at 200 o C for 18 hours, the hydrothermal reaction solution was 1.25wt.% HF and 0.4wt.% malic acid aqueous solution, and the hydrothermal solution accounted for 65% of the volume of the...

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
Apertureaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides a denitration catalyst. The denitration catalyst takes three-dimensional macroporous titanium metal with the pore size of 50-100 [mu]m as a carrier skeleton, hydrothermal in-situ corrosion is conducted on the surface of the skeleton to obtain corrosion pores with the pore size of 5-10 [mu]m, then anodic oxidation is conducted to obtain a nano-array oxide film on the surface of the skeleton, and then (MnCe)OX denitration active components are loaded on the surface of the skeleton, and thus the efficient three-dimensional porous (MnCe) OX / TiO2 / foam Ti denitration catalyst is obtained.

Description

technical field [0001] The invention relates to a denitration catalyst and belongs to the field of denitration catalysts. [0002] technical background [0003] SCR denitrification technology is currently the most widely used denitrification technology. Under the action of a specific catalyst, the reducing agent selectively reduces NOx to non-toxic and harmless nitrogen. According to the reducing agent, SCR technology can be divided into NH3-SCR, CHx-SCR, H2-SCR, CO-SCR. [0004] Active components: MnOx has excellent denitrification activity at low temperature, and Mn-based oxide catalysts have attracted much attention due to their extremely high low temperature denitrification performance. The main reason may be that the Mn species has abundant variable valence states, which can provide free electrons as active components. MnO X The electrons on the d orbitals of Mn in different valence states are in a half-filled state, the electronic orbitals of tetravalent Mn are...

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): B01J21/06B01J23/34B01J35/10B01J37/00B01J37/02B01J37/10B01J37/34B01D53/86B01D53/56
CPCB01J37/0018B01J37/10B01J37/348B01J37/0207B01J23/34B01J21/063B01D53/8628B01J35/60B01J35/615
Inventor 白洋洋
Owner 江苏美玛技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com