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

Catalytic converter for purifying exhaust of natural gas automobile

A technology for catalytic converters and automobile exhaust, which is applied in the field of natural gas automobile exhaust gas purification catalytic converters, can solve the problems of high light-off temperature and poor catalytic effect, and achieves the advantages of improving stability, reducing back pressure and reducing the amount of precious metals. Effect

Inactive Publication Date: 2011-04-06
EAST CHINA UNIV OF SCI & TECH +1
View PDF12 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This catalyst can better remove HC, NO x and CO, but the light-off temperature for hydrocarbons is higher, and the catalytic effect is poor when the car is cold started

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
  • Catalytic converter for purifying exhaust of natural gas automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The cordierite honeycomb ceramic carrier with a diameter of 190mm, a height of 100mm (volume 2.84L), and a pore density of 300cpsi was placed in a 110°C drying oven to dry, and then purged. Weigh 9000g of deionized water, add 3720g of γ-Al to the aqueous solution 2 o 3 , 900g lanthanum-yttrium modified cerium-zirconium solid solution, 240g lanthanum oxide, 240g praseodymium oxide, 420g CoO with cobalt / tin molar ratio of 4:1 x -SnO xCobalt-tin transition metal composite oxide, 150g MnO with a manganese / cerium molar ratio of 1:4 x -CeO 2 Transition metal-rare earth composite oxide, 180g of aluminum glue, stirring at room temperature, while adjusting the pH value to 4 with acetic acid, to prepare coating slurry. Then it was uploaded on an automatic coating machine, the excess slurry was purged with air, dried at 110°C for 8 hours, and calcined at 650°C for 4 hours.

[0027] Weigh 5.462gPd (NO 3 ) 2 (measured as Pd), 0.546gPt (NO 3 ) 2 (measured in Pt), add deioniz...

Embodiment 2

[0029] The preparation method is the same as in Example 1, except that the active metal content of the front catalyst is Pd1.927g / L and Pt0.193g / L, and the active metal content of the rear catalyst is Pd1.377g / L and Pt0.035g / L. The gap between the rear catalysts is 20mm, and the encapsulation obtains the gas vehicle exhaust purification catalytic converter 2# of the present invention,

Embodiment 3

[0031] The preparation method is the same as in Example 1, except that the pre-catalyst active metal content is Pd2.319g / L, Pt0.155g / L, and the post-catalyst active metal content is Pd1.205g / L, Pt0.031g / L. The gap between the rear catalysts is 20mm, and the encapsulation obtains the gas vehicle exhaust purification catalytic converter 3# of the present invention,

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
Hole densityaaaaaaaaaa
Hole densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a catalytic converter for purifying exhaust of a natural gas automobile, which comprises a front catalyst and a rear catalyst. The exhaust of the natural gas automobile passes through the front catalyst and the rear catalyst at one time so as to meet the emission requirement of the natural gas automobile. By optimizing the combined mode of the front and rear catalysts, the purification efficiency of the catalytic converter can be effectively improved, the noble metal consumption and cost of the catalytic converter are reduced, and the back pressure of the catalytic converter can be effectively reduced by changing a gap between the front catalyst and the rear catalyst. In the front and rear catalysts, cordierite honeycomb ceramic is taken as a carrier, activated alumina, ceria-zirconia solid solution, rare earth oxides, alkaline-earth metal oxides, bonders, and transition metal composite oxides or transition metal rare earth composite oxides as active ingredients are taken as coatings, and platinum group metal active ingredients are impregnated on the coatings. The catalytic converter has high catalytic activity and stability on hydrocarbon compounds, can be used as a catalytic converter for purifying the exhaust of the natural gas engine, and also can be used as a catalytic converter for purifying the exhaust of a motor vehicle which takes gasoline and liquefied petroleum gas as fuel.

Description

technical field [0001] The invention relates to a catalytic converter for purifying exhaust gas of a natural gas vehicle. Background technique [0002] Oil shortage and ecological deterioration are the main problems faced by human beings in the 21st century. Energy shortage will directly affect the sustainable economic development of various countries, while environmental pollution directly threatens human health and survival. Natural gas is an important part of the world's energy, and it is listed as the three pillars of the world's energy alongside coal and oil. According to research data, the world's proven oil reserves can last for 40-70 years at the current consumption rate of automobiles. The proven reserves of natural gas are expected to last for 200 years. In this sense, natural gas vehicles are an important direction for the development of the automobile industry in the 21st century. [0003] Natural gas is a kind of clean energy, the main component is methane, a...

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): F01N3/28B01J23/89B01D53/94B01D53/72B01D53/56B01D53/62
CPCY02A50/20
Inventor 卢冠忠朱增赞周坚刚张蓓郭耘郭杨龙张志刚
Owner EAST CHINA UNIV OF SCI & TECH
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