Catalyst for removing nitrogen oxide through selective catalytic reduction for Ce2O3 and V2O5 double active composition diesel truck

A nitrogen oxide, V2O5 technology, applied in metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst activation/preparation, etc., can solve the problem of low exhaust temperature of diesel vehicles and great harm to human health and other problems, to achieve the effect of high activity temperature window, good low temperature activity and high temperature selectivity, and wide activity temperature window

Inactive Publication Date: 2009-10-21
TIANJIN UNIV
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, my country's urban roads are crowded, vehicles stop and go, and the exhaust temperature of diesel vehicles is low. The above-mentioned vanadium-type SCR catalysts cannot meet the actual requirements of low-temperature (<300°C) activity of SCR catalysts for diesel vehicles in my country.
At the same time V 2 o 5 It is a highly toxic substance that is harmful to human health

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
  • Catalyst for removing nitrogen oxide through selective catalytic reduction for Ce2O3 and V2O5 double active composition diesel truck
  • Catalyst for removing nitrogen oxide through selective catalytic reduction for Ce2O3 and V2O5 double active composition diesel truck
  • Catalyst for removing nitrogen oxide through selective catalytic reduction for Ce2O3 and V2O5 double active composition diesel truck

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) TiO 2 Precursor preparation:

[0029] It is determined to load the coating material TiO on the 1kg cordierite honeycomb ceramic carrier 2 .

[0030] Weigh 750ml of butyl titanate, add it to 1500ml of absolute ethanol, add dropwise 375ml of 10% (weight ratio) hydrochloric acid while stirring, and continue stirring until the mixture becomes a transparent and clear liquid.

[0031] (2)TiO 2 Coating application:

[0032] Put the cleaned and dried 1kg cordierite honeycomb ceramic carrier into the TiO prepared in step (1) 2 Immerse in the precursor solution at 60°C for 1h, blow off the residual liquid in the channel after taking it out, dry at 105°C for 12h, and then calcinate at 600°C for 2h. Repeat the above impregnation, drying and calcination process until the TiO prepared in step (1) 2 The precursor solution is used up.

[0033] (3) Determination of the loading amount of oxide active components

[0034] According to Ce 2 o 3 :V 2 o 5 : WO 3 :TiO 2 (coat...

Embodiment 2

[0041] (1) TiO 2 Precursor preparation:

[0042] It is determined to load the coating material TiO on the 1kg cordierite honeycomb ceramic carrier 2 .

[0043] Weigh 750ml of butyl titanate, add it to 1500ml of absolute ethanol, add dropwise 375ml of 10% (weight ratio) hydrochloric acid while stirring, and continue stirring until the mixture becomes a transparent and clear liquid.

[0044] (2)TiO 2 Coating application:

[0045] Put the 1kg cordierite honeycomb ceramic carrier after cleaning and drying into the TiO prepared in step (1) 2 Immerse in the precursor solution at 60°C for 1h, blow off the residual liquid in the channel after taking it out, dry at 105°C for 12h, and then calcinate at 600°C for 2h. Repeat the above impregnation, drying and calcination process until the TiO prepared in step (1) 2 The precursor solution is used up.

[0046] (3) Determination of the loading amount of oxide active components

[0047] According to Ce 2 o 3 :V 2 o 5 : WO 3 :TiO ...

Embodiment 3

[0054] (1) TiO 2 Precursor preparation:

[0055] It is determined to load the coating material TiO on the 1kg cordierite honeycomb ceramic carrier 2 .

[0056] Weigh 750ml of butyl titanate, add it to 1500ml of absolute ethanol, add dropwise 375ml of 10% (weight ratio) hydrochloric acid while stirring, and continue stirring until the mixture becomes a transparent and clear liquid.

[0057] (2)TiO 2 Coating application:

[0058] Put the cleaned and dried 1kg cordierite honeycomb ceramic carrier into the TiO prepared in step (1) 2 Immerse in the precursor solution at 60°C for 1h, blow off the residual liquid in the channel after taking it out, dry at 105°C for 12h, and then calcinate at 600°C for 2h. Repeat the above impregnation, drying and calcination process until the TiO prepared in step (1) 2 The precursor solution is used up.

[0059] (3) Determination of the loading amount of oxide active components

[0060] According to Ce 2 o 3 :V 2 o 5 : WO 3 :TiO2 (coatin...

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 relates to a catalyst for removing nitrogen oxide through selective catalytic reduction for an automobile diesel engine adopting Ce2O3 and V2O5 double active compositions. The catalyst adopts scordierite honeycomb ceramics as a framework material, the Ce2O3 and the V2O5 as main active compositions, WO3 or MoO3 as an auxiliary catalyst composition, and TiO2 as a coating substrate, wherein the mass fraction of the main active compositions, namely the Ce2O3 and the V2O5, to the auxiliary catalyst composition WO3 or MoO3 to the coating substrate TiO2 is 1-3:6:12:85-93. The specific process comprises the following steps: preparing a TiO2 precursor solution; coating a TiO2 coating; coating an auxiliary catalyst; determining the loading of active compositions of oxides; and coating the main active compositions, namely the Ce2O3 and the V2O5. The catalyst replaces the V2O5 with high toxicity with the Ce2O3 with low toxicity, and reduces the environmental hazards of the catalyst, and the replaced catalyst has wider active temperature range, particularly greatly improves the low-temperature activity, and is particularly suitable for the traffic conditions of urban highways of China.

Description

technical field [0001] The invention belongs to a catalyst for diesel vehicles, in particular to a catalyst with Ce 2 o 3 and V 2 o 5 A catalyst for removing nitrogen oxides by selective catalytic reduction for diesel vehicles with dual active components and a preparation method thereof. Background technique [0002] Diesel has a large vehicle weight and low specific fuel consumption, and occupies a dominant position in my country's large and medium-sized passenger and truck vehicles. However, due to its high nitrogen oxide (NOx) emissions, it seriously pollutes the atmospheric environment and poses a potential threat to human health. As a result, many countries have enacted increasingly stringent emission regulations to limit NOx emissions from diesel vehicles. while NH 3 Or urea-Selective Catalytic Reduction (Selective Catalytic Reduction-SCR) technology has a very high NOx purification capacity, and at the same time, it can also reduce the fuel consumption of diesel v...

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): B01J23/30B01J23/28B01J23/22B01J23/10B01J37/02B01J37/08B01D53/94B01D53/56
CPCY02T10/24Y02A50/20Y02T10/12
Inventor 宋崇林吕刚裴毅强宾峰张清茂
Owner TIANJIN 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