Catalyst for concurrently removing CO, CH, NOx and PM, and preparation method thereof

A technology of catalysts and composite oxides, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve the problem of ineffective removal of HC and CO in automobiles, which needs to be further explored , general catalytic activity, etc., to achieve the effect of facilitating large-scale production, breaking through technical bottlenecks, and reducing costs

Active Publication Date: 2013-02-27
SHANDONG GEMSKY ENVIRONMENTAL PROTECTION TECH CO LTD
View PDF4 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN1628904A discloses an automobile exhaust catalyst with high catalytic activity and good thermal stability in the presence of excess oxygen. Emissions of HC and CO
[0006] Patent CN1355066A discloses a method for preparing an automobile exhaust gas purification catalyst. The catalyst uses a cordierite honeycomb body as a carrier, the inner coati

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 concurrently removing CO, CH, NOx and PM, and preparation method thereof
  • Catalyst for concurrently removing CO, CH, NOx and PM, and preparation method thereof
  • Catalyst for concurrently removing CO, CH, NOx and PM, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example illustrates the simultaneous removal of CO, CH, and NO provided by the present invention x , PM catalyst preparation.

[0027] (1) Preparation of self-made carrier:

[0028] Take 30g of silica, 40g of alumina and 30g of magnesia and mix them evenly, extrude them into a muffle furnace, roast at 1300°C for 6h, then boil with oxalic acid with a mass concentration of 5% for 2h, then pass through 80°C, Dry for 2 hours, and bake at 400°C for 6 hours to obtain a self-made honeycomb ceramic carrier;

[0029] (2) Preparation of active component impregnation solution

[0030] Impregnation solution 1: first prepare an aqueous solution of lanthanum nitrate, cerium nitrate, copper nitrate, and zirconium nitrate, add an appropriate amount of complexing agent ammonium citrate solution, and place it in a constant temperature water bath at 90°C until it is in the form of a sol; prepare the obtained Ce 0.1 Zr 0.9 LaCuO xIn the active formula, the molar ratio of Ce and Z...

Embodiment 2

[0035] This example illustrates a simultaneous removal of CO, CH, and NO provided by the present invention x , PM catalyst preparation.

[0036] (1) Preparation of self-made carrier:

[0037] Take 40g of silica, 30g of alumina and 30g of magnesia, mix them evenly, extrude them into a muffle furnace, roast them at 1400°C for 6 hours, boil them in nitric acid with a mass concentration of 10% for 2 hours, and heat them at 80°C. Dry for 2 hours, and bake at 400°C for 6 hours to obtain a self-made honeycomb ceramic carrier;

[0038] (2) Preparation of active component impregnation solution

[0039] Impregnation solution 1: first prepare an aqueous solution of lanthanum acetate, cerium acetate, cobalt acetate, and zirconium acetate, and add an appropriate amount of complexing agent ammonium citrate solution, and place it in a constant temperature water bath at 90°C until it is in the form of a sol; prepare the obtained La 0.3 Zr 0.7 CaCO x The molar ratio of La and Zr in the ac...

Embodiment 3

[0044] This example illustrates a simultaneous removal of CO, CH, and NO provided by the present invention x , PM catalyst preparation.

[0045] (1) Preparation of self-made carrier:

[0046] Take 55g of silica, 20g of alumina and 25g of magnesia, mix them evenly, extrude them into a muffle furnace, roast them at 1400°C for 4 hours, then boil them with 20% acetic acid for 3 hours, then heat them at 120°C for 1 hour Drying and firing at 600°C for 4 hours to obtain a self-made honeycomb ceramic carrier;

[0047] (2) Preparation of active component impregnation solution

[0048] Impregnation solution 1: first prepare the aqueous solution of neodymium oxalate, praseodymium oxalate, manganese oxalate, and zirconium oxalate, add an appropriate amount of complexing agent urea solution, and place it in a constant temperature water bath at 90°C until it is in the form of a sol; prepare the obtained Nd 0.5 Zr 0.5 PrMnO x The molar ratio of Nd and Zr in the active formula is 0.5:0.5...

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 present invention relates to a catalyst for concurrently removing CO, CH, NOx and PM, and a preparation method thereof, and belongs to the field of an atmosphere pollution treatment technology and environment protection catalysis materials. According to the catalyst, a solid solution of rare earth and a rare metal zirconium, a perovskite-type composite oxide and a small amount of a noble metal are adopted as active components, a self-made honeycomb ceramic is adopted as a carrier, the total loading amount of the solid solution of the rare earth and the rare metal zirconium, and the perovskite-type composite oxide in the active components is 5-20% of the mass of the catalyst, the loading amount of the noble metal is 0.01-1% of the mass of the catalyst, a general formula of the active components is AgqE1-qAyZr1-yBCOx, E is a noble metal, A and B are rare earth, C is a transition metal, y is more than 0 and less than 1, q is more than 0 and less than 1, E is one or two selected from noble metals such as platinum (Pt), palladium (Pd) and rhodium (Rh), A and B are two selected from rare earth such as lanthanum (La), cerium (Ce), praseodymium (Pr) and neodymium (Nd), and C is one selected from transition metals such as copper (Cu), cobalt (Co), manganese (Mn), iron (Fe) and nickel (Ni).

Description

technical field [0001] The invention relates to a method for simultaneously removing carbon monoxide (CO), hydrocarbons (CH), nitrogen oxides (NO x ), a particulate matter (PM) catalyst and a preparation method thereof, belonging to the fields of air pollution control technology and environmental protection catalytic materials. Background technique [0002] With the rapid development of the national economy and the continuous improvement of people's living standards, my country's existing car ownership has exceeded the 100 million mark, and is still increasing at a rate of 10% per year. While improving production efficiency and providing convenient life, the tail gas emitted by automobiles has become the main source of air pollution in large and medium-sized cities in my country, including a large amount of carbon monoxide (CO), hydrocarbons (CH), nitrogen oxides (NO x ), sulfide, particulate matter (PM), formaldehyde, acrolein, etc., seriously threaten the growth of animal...

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): B01J23/50B01J23/89B01D53/94B01D53/62B01D53/72B01D53/56
CPCY02A50/20
Inventor 沈树宝严小康祝社民陈英文黄琼李兵
Owner SHANDONG GEMSKY ENVIRONMENTAL PROTECTION TECH CO LTD
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