Oxidation catalyst for diesel engine exhaust

An oxidation catalyst and diesel engine technology, applied in physical/chemical process catalysts, molecular sieve catalysts, catalyst activation/preparation, etc., can solve the problems of increasing the cost of diesel engine exhaust treatment, cumbersome catalyst devices, catalyst pressure drop, etc., and achieve post-treatment exhaust gas treatment. , The effect of improving sulfur resistance and reducing combustion temperature

Inactive Publication Date: 2014-06-18
SHANGHAI LANGT AUTOCATALYST
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst device is cumbersome and costly, which increases the exhaust gas treatment cost of the diesel engine
Moreover,...

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
  • Oxidation catalyst for diesel engine exhaust
  • Oxidation catalyst for diesel engine exhaust

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 prepares catalyst carrier

[0037] Put the cordierite honeycomb ceramics in an ultrasonic instrument for cleaning, add hydrofluoric acid during the cleaning process and adjust the pH to 2, the frequency is 50HZ, the power is 100W, and the ultrasonic cleaning time is 200min to obtain a catalyst carrier with a cleaner pore wall .

Embodiment 2

[0038] Embodiment 2 prepares catalyst carrier

[0039] Put the cordierite honeycomb ceramics in an ultrasonic instrument for cleaning, add hydrofluoric acid during the cleaning process and adjust the pH to 1, the frequency is 50HZ, the power is 100W, and the ultrasonic cleaning time is 400min to obtain a catalyst carrier with a cleaner pore wall .

Embodiment 3

[0040] Embodiment 3 Preparation of Diesel Engine Exhaust Oxidation Catalyst

[0041] Preparation of modified powder: Simultaneously modify γ-alumina with silica, titania precursor silica sol, and n-butyl titanate at a temperature of 150°C and a pressure of 10 MPa, in which silica, titania and The mass ratio of γ-alumina is 28:26:46;

[0042] Preparation of modified molecular sieves: modifying molecular sieves with a platinum nitrate solution with a mass concentration of 10%; wherein the weight ratio of platinum simple substance to molecular sieves in the platinum nitrate solution is 1:30; the silicon-aluminum molar ratio of the molecular sieves is 150;

[0043] Mix the modified powder, modified molecular sieve, polyvinyl alcohol and water according to the mass ratio of 45:30:1:80, carry out high-speed shear emulsification, and the shear speed is 150r / min, so as to obtain the coating colloid;

[0044] The coating colloid is added in the ammonium humate to age, the addition of ...

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
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses an oxidation catalyst for diesel engine exhaust. The catalyst adopts ceramic honeycomb cleaned by ultrasonic as a carrier. The catalyst is prepared by adding the ceramic honeycomb cleaned by ultrasonic into aged coating colloid, dipping and loading, drying the loaded ceramic honeycomb and calcinating. The catalyst can comprehensively treat discharge of carbon cigarette pellets and gaseous pollutants.

Description

technical field [0001] The invention belongs to the field of diesel engine tail gas treatment, in particular to a diesel engine tail gas oxidation catalyst. Background technique [0002] In the past 20 years, in the face of the pressure brought by the depletion of the world's oil resources to social development and the impact of the rapid increase in car ownership on the environment, the world's automobiles have been constantly looking for solutions to achieve sustainable development of the automobile industry. In the development of advanced technology, people have a newer and deeper understanding of diesel engines and diesel vehicles. Compared with gasoline engines, diesel engines are economical and powerful, but they have brought certain negative effects on environmental pollution. Compared with gasoline engines, the CO and HC emitted by diesel engines are only one-tenth of those emitted by gasoline engines, and the NO X Basically the same, but PM (carbon particulate matt...

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): B01J37/34B01J29/068B01D53/94
Inventor 张现龙姜瑞霞陈令伍管嘉林张蓓周坚刚
Owner SHANGHAI LANGT AUTOCATALYST
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