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

Preparation method of high-activity diesel particulate filter (DPF) coating capable of simultaneously removing NOx and PM

A DPF, high-activity technology, applied in the field of preparation of high-activity DPF coatings, can solve the problems of damage to the carrier, increase economic costs, etc., and achieve the effects of low preparation costs, reduced economic costs, and easy mass production

Inactive Publication Date: 2019-09-13
FAW JIEFANG AUTOMOTIVE CO
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for frequent oil injection in active regeneration, on the one hand frequent high temperature will damage the carrier, on the other hand it will greatly increase the economic cost

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
  • Preparation method of high-activity diesel particulate filter (DPF) coating capable of simultaneously removing NOx and PM
  • Preparation method of high-activity diesel particulate filter (DPF) coating capable of simultaneously removing NOx and PM

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Dissolve 51g of cerium acetate weighed in 2500g of deionized water, add 2000g of small-pore molecular sieve powder SSZ-13, reflux at 45°C, and stir for 8h;

[0021] (2) After press filtration, washing twice, and 1000HZ microwave radiation drying;

[0022] (3) Weigh 17g of copper acetate and 1g of ammonium bicarbonate to make a solution, then add the powder obtained in (2), reflux at 45°C, and stir for 8h;

[0023] (4) After pressure filtration, washing, drying at 105°C, and high-temperature calcination for 5 hours, a non-precious metal coating that simultaneously removes NOx and PM is obtained.

Embodiment 2

[0025] (1) Dissolve 48g of cobalt acetate weighed in 2600g of deionized water, add small-pore molecular sieve powder 1800g Sapo-34, reflux at 65°C, and stir for 4h;

[0026] (2) After press filtration, washing twice, and 1200HZ microwave radiation drying;

[0027] (3) Weigh 20g of copper nitrate and 0.8g of ammonium bicarbonate to form a solution, then add the powder obtained in (2), reflux at 60°C, and stir for 4h;

[0028] (4) After pressure filtration, washing, drying at 105°C, and high-temperature calcination for 8 hours, a non-precious metal coating that simultaneously removes NOx and PM is obtained.

Embodiment 3

[0030] (1) Dissolve 56g of lanthanum acetate in 2800g of deionized water, add small-pore molecular sieve powder 800g Sapo-34 and 800g SSZ-13, reflux at 60°C, and stir for 4 hours;

[0031] (2) After press filtration, washing twice, and 1200HZ microwave radiation drying;

[0032] (3) Weigh 22g of copper acetate and 1.3g of ammonium bicarbonate to make a solution, then add the powder obtained in (2), reflux at 60°C, and stir for 4h;

[0033] (4) After pressure filtration, rinsing, drying at 105°C, and high-temperature calcination for 6 hours, a non-precious metal coating that simultaneously removes NOx and PM is obtained.

[0034] It should be noted that, in other embodiments,

[0035] It is also feasible to adopt certain two combinations in cerium acetate, cobalt acetate and lanthanum acetate in step (1);

[0036] It is also feasible to adopt the combination of copper acetate and copper nitrate in step (3).

[0037] Table 1

[0038] Example Specific surface area / ...

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
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a high-activity diesel particulate filter (DPF) coating capable of simultaneously removing NOx and particulate matter (PM). The preparation method comprises the following steps: (1) dissolving a certain mass of transition metal acetate into deionized water, adding small-pore molecular sieve powder, carrying out refluxing at 45-65 DEG C, and carrying out stirring for 4-8 hours; (2) carrying out pressure filtration, washing and microwave radiation drying; (3) adding a certain mass of copper salt and ammonium bicarbonate to prepare a solution, and then adding the powder obtained in the step (2), carrying out refluxing at 45-60 DEG C, and carrying out stirring for 4-8 hours; and (4) carrying out pressure filtration, washing and drying, and carrying out high-temperature calcination for 5-8 hours to obtain a non-noble metal coating capable of simultaneously removing NOx and PM. The catalyst prepared by the method disclosed by the invention has arelatively low PM ignition temperature, meanwhile, PM removal efficiency is up to 92% or above, NOx removal efficiency is up to 95% or above, and requirements of ''Limits and measurement methods foremissions from diesel fuelled heavy-duty vehicles (CHINA VI)'' can be met.

Description

technical field [0001] The invention relates to the technical field of post-treatment emission of diesel vehicles, in particular to a preparation method of a highly active DPF coating for simultaneous removal of NOx and PM. Background technique [0002] With the gradual upgrading of environmental protection regulations, the NOx and PM limits for diesel vehicle emissions are becoming more and more stringent. With the promulgation of the National VI emission regulations, the emission limits will be further tightened in the future. The emission of nitrogen oxides and NOx in the National VI stage will be significantly reduced by about 77% on the basis of the existing National V. At the same time, the durability of the SCR catalytic converter is required. Reached 700,000 kilometers. This is an unprecedented challenge for the scientific and technological circles and industrial circles engaged in the research and development of diesel engine emission pollution control technology. ...

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): B01J29/72B01J29/85B01J35/10B01J37/02B01D49/00B01D53/86B01D53/56
CPCB01J29/723B01J29/85B01J37/0215B01D53/8628B01D49/00B01J35/617
Inventor 于力娜张克金崔龙韩建李军泽
Owner FAW JIEFANG AUTOMOTIVE CO
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