Rare earth-based SCR catalyst for diesel oil vehicle and preparation method of rare earth-based SCR catalyst

A kind of SCR catalyst, rare earth-based technology, applied in the field of rare earth-based SCR catalyst and preparation for diesel vehicles, can solve the problem of low conversion rate, achieve good low temperature performance, superior resistance to sulfur poisoning, and wide operating temperature window

Active Publication Date: 2017-06-06
BAOTOU RES INST OF RARE EARTHS +1
View PDF14 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is aimed at the existing diesel vehicle catalyst at about 200 ℃ NO x To solve the problem of low conversion rate, provide a rare earth-based SCR catalyst for diesel veh

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
  • Rare earth-based SCR catalyst for diesel oil vehicle and preparation method of rare earth-based SCR catalyst
  • Rare earth-based SCR catalyst for diesel oil vehicle and preparation method of rare earth-based SCR catalyst
  • Rare earth-based SCR catalyst for diesel oil vehicle and preparation method of rare earth-based SCR catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a rare earth-based SCR catalyst for diesel vehicles with good low-temperature performance and a wide operating temperature window. The specific synthesis steps are as follows:

[0029] (1) Slurry preparation: Weigh 48g of rare earth-based powder and add 20g of glutinous rice glue into 120mL of deionized water. For the rare earth-based powder, the cerium-niobium composite oxide contained is 10% of the total powder mass, the iron-copper composite oxide is 2% of the total powder mass, rhenium oxide is 0.28% of the total powder mass, and the rest is titanium Tungsten powder, the synthesis method is the traditional deposition precipitation method, and the precipitation agent is ammonia water.

[0030] (2) Slurry ball mill: The slurry is ground by a planetary ball mill with a speed of 400 rpm and a running time of 10 minutes. The final slurry particle size is D 50 is 721 nm.

[0031] (3) Add microcrystalline cellulose: add 0.068 g of microcrystalline ...

Embodiment 2

[0036] A method for preparing a rare earth-based SCR catalyst for diesel vehicles with good low-temperature performance and a wide operating temperature window. The specific synthesis steps are as follows:

[0037] (1) Slurry preparation: Weigh 48g of rare earth-based powder and add 24g of glutinous rice glue into 120mL of deionized water. For the rare earth-based powder, the cerium-lanthanum composite oxide contained is 13% of the total powder mass, the manganese-samarium composite oxide is 2.5% of the total powder mass, the rhenium oxide is 0.28% of the total powder mass, and the rest is titanium Tungsten powder, the synthesis method is the traditional deposition precipitation method, and the precipitation agent is ammonia water.

[0038] (2) Slurry ball mill: The slurry is ground by a planetary ball mill with a speed of 400 rpm and a running time of 10 minutes. The final slurry particle size is D 50 is 615 nm.

[0039] (3) Add microcrystalline cellulose: add 0.180 g of mi...

Embodiment 3

[0044] A method for preparing a rare earth-based SCR catalyst for diesel vehicles with good low-temperature performance and a wide operating temperature window. The specific synthesis steps are as follows:

[0045] (1) Slurry preparation: Weigh 48g of rare earth-based powder and add 28g of glutinous rice glue into 120mL of deionized water. For the rare earth-based powder, the cerium-tin composite oxide contained is 13.5% of the total powder mass, the copper-hafnium composite oxide is 3.1% of the total powder mass, rhenium oxide is 0.35% of the total powder mass, and the rest is titanium Tungsten powder, the synthesis method is the traditional deposition precipitation method, and the precipitation agent is ammonia water.

[0046] (2) Slurry ball mill: The slurry is ground by a planetary ball mill with a speed of 400 rpm and a running time of 10 minutes. The final slurry particle size is D 50 at 586 nm.

[0047] (3) Adding microcrystalline cellulose: adding 0.279 g of microcry...

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 rare earth-based SCR catalyst for a diesel oil vehicle and a preparation method of the rare earth-based SCR catalyst. According to the catalyst, cordierite honeycomb ceramic is taken as a carrier and is coated with coating layer slurry, and the coating layer slurry mainly contains rare earth-based powder, a binder, an additive and water; and the rare earth-based powder contains the following four active components: the first active component is one or more of cerium-niobium composite oxide, cerium-tin composite oxide, cerium-yttrium composite oxide and cerium-lanthanum composite oxide, the second active component is one or more of manganese-samarium composite oxide, zirconium-hafnium composite oxide, zinc-erbium composite oxide, iron-copper composite oxide, copper-hafnium composite oxide and zirconium-aluminum composite oxide, the third active component is rhenium oxide, and the fourth active component is titanium-tungsten powder. The rare earth-based SCR catalyst has the advantages that the low temperature performance is good, an operation temperature window is wide, and the conversion rate of NOx reaches above 70% at 150 DEG C, is more than 90% at 180 DEG C and is 100% at 200-500 DEG C.

Description

technical field [0001] The invention relates to a rare earth-based SCR catalyst for diesel vehicles and a preparation method thereof, and belongs to the technical field of catalytic reduction method for purifying motor vehicle exhaust emissions. Background technique [0002] Due to the incomparable advantages of gasoline engines in terms of power, economy and reliability, diesel engines, especially CO 2 With low emissions, its application is no longer limited to the power system of marine and large commercial passenger vehicles, but has been gradually extended to various types of vehicles. The share of diesel cars in the European and American markets has reached more than 40%. The Chinese government also strongly supports the development of diesel vehicles in the planning of the automobile industry. But at the same time, nitrogen oxides (NO x ) and other pollution discharge problems are becoming increasingly prominent, NO x It is one of the main culprits of acid rain, pho...

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): B01J23/889B01J23/36B01D53/94B01D53/56
CPCB01D53/9418B01D2258/012B01J23/002B01J23/36B01J23/8896B01J2523/00B01J2523/17B01J2523/3712B01J2523/47B01J2523/56B01J2523/69B01J2523/74B01J2523/842B01J2523/3706B01J2523/3737B01J2523/72B01J2523/43B01J2523/49Y02A50/20Y02T10/12
Inventor 李兆强王艳赵文怡张丞马志鸿张旭霞王荣宋静
Owner BAOTOU RES INST OF RARE EARTHS
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