Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
VEHICLE EMISSION CONTROLE BY CATLYTIC
CONVERTER
Presented by:
Jeevan B M
4JC15MEE11
2nd SEM Automotive electronics
SJCE, M...
CONTENTS
• Introduction
• History
• Construction of catalytic converter
• Working of catalytic converter
• Types of cataly...
INTRODUCTION
• Electronic emission is a substance discharged into air,
especially by an internal combustion engine.
• Vehi...
•There are mainly three types of vehicle emission
control they are
oAir injection
oExhaust gas recirculation
oCatalytic co...
5
Figure: location of the catalytic converter
6
HISTORY
• The catalytic converter was invented by Eugene Houdry, a
French mechanical engineer and expert in catalytic oi...
7
• 1975 onwards started use these catalytic converters in fuel
engines vehicles
• Three-way catalyst technology, introduc...
CONSTRUCTION OF CATALYTIC CONVERTER:
8
9
Figure: internal structure of catalytic converter
Träger-Core
Zwischenschicht-Washcoat
Katalysatorkontakt- Catalyst
•The core is often a ceramic honeycomb in modern catalytic
converters.
•The washcoat, when added to the core, forms a roug...
Working of Catalytic Converter
•In chemistry, a catalyst is a substance that causes or accelerates
a chemical reaction wit...
12
Figure: simple catalytic converter
Types of Catalytic converter
•Catalytic converters are classified into 2 types based on the
capability of eliminating the ...
14
• The two-way oxidation catalytic converter performs two
simultaneous tasks of oxidation of carbon monoxide to carbon
d...
15
Three-way Catalytic converter
• It converts harmful gases(Nox, co, HC) in the engine
exhaust to relatively harmless gas...
16
Stage 2:in this stage oxidation occurs as in two way
catalytic converter
• 3-way catalytic converters are so named beca...
17
Pollutantsingramperkilometres
1818
Advantages and Disadvantages
• Advantages
o Reduce the amount of harmful pollution produced by the
vehicles
o Faster ...
CONCLUSION
•Vehicular emissions produces the CO, HC and NOx these
emission are reduced by using catalytic converters.
•The...
REFERENCES
 Air injection and Catalytic converters by Matthew Whitten
Brookhaven College
 Catalystor.pdf that gives comp...
21
Upcoming SlideShare
Loading in …5
×

Emission Control by Catalytic Converter, Jeevan B M

4,512 views

Published on

A catalytic converter is an emissions control device that converts toxic gases and pollutants in exhaust gas to less toxic pollutants. The catalytic converter was invented by Eugene Houdry, a French mechanical engineer and expert in catalytic oil refining. In the catalytic converter, there are two different types of catalyst at work, a reduction catalyst and an oxidation catalyst.

Published in: Automotive
  • Login to see the comments

Emission Control by Catalytic Converter, Jeevan B M

  1. 1. VEHICLE EMISSION CONTROLE BY CATLYTIC CONVERTER Presented by: Jeevan B M 4JC15MEE11 2nd SEM Automotive electronics SJCE, Mysore 1
  2. 2. CONTENTS • Introduction • History • Construction of catalytic converter • Working of catalytic converter • Types of catalytic converter • Advantages and disadvantages • Conclusions • References 2
  3. 3. INTRODUCTION • Electronic emission is a substance discharged into air, especially by an internal combustion engine. • Vehicular emissions include a number of biologically active substances such as CO, HC and NOx. • These air pollutants are responsible for a number of adverse environmental effects such as photochemical smog, rising mercury, acid rain, death of rain forests, health hazards and reduced atmospheric visibility • Vehicle emissions control is the study of reducing the motor vehicle emissions 3
  4. 4. •There are mainly three types of vehicle emission control they are oAir injection oExhaust gas recirculation oCatalytic converter •A catalytic converter is an emissions control device that converts toxic gases and pollutants in exhaust gas to less toxic pollutants. •A catalytic converter provides an environment for a chemical reaction wherein toxic combustion by products are converted to less-toxic substances 4 Continue..
  5. 5. 5 Figure: location of the catalytic converter
  6. 6. 6 HISTORY • The catalytic converter was invented by Eugene Houdry, a French mechanical engineer and expert in catalytic oil refining. • Houdry first developed catalytic converters for smoke stacks called “cats” for short,. • In the mid-1950s, he began research to develop catalytic converters for gasoline engines used on cars • Catalytic converters were further developed by a series of engineers including John J. Mooney and Carl D. Keith at the Engelhard Corporation, creating the first production catalytic converter in 1973
  7. 7. 7 • 1975 onwards started use these catalytic converters in fuel engines vehicles • Three-way catalyst technology, introduced in the 1980s, made it also possible to control NOx emissions from SI engines Continue..
  8. 8. CONSTRUCTION OF CATALYTIC CONVERTER: 8
  9. 9. 9 Figure: internal structure of catalytic converter Träger-Core Zwischenschicht-Washcoat Katalysatorkontakt- Catalyst
  10. 10. •The core is often a ceramic honeycomb in modern catalytic converters. •The washcoat, when added to the core, forms a rough, irregular surface, that surface area is utilized for catalyst reaction. •The catalyst(Platinum) itself is most often a mix of precious metals. •Palladium(oxidation catalyst) and rhodium(reduction catalyst) are two other precious metals used. 10
  11. 11. Working of Catalytic Converter •In chemistry, a catalyst is a substance that causes or accelerates a chemical reaction without itself being affected. •In the catalytic converter, there are two different types of catalyst at work, a reduction catalyst and an oxidation catalyst. •Both types consist of a ceramic structure coated with a metal. •catalyst, usually platinum, rhodium and/or palladium. 11
  12. 12. 12 Figure: simple catalytic converter
  13. 13. Types of Catalytic converter •Catalytic converters are classified into 2 types based on the capability of eliminating the number of pollutants oTwo-way catalytic converter oThree-way catalytic converter. 13 Two-way Catalytic converter
  14. 14. 14 • The two-way oxidation catalytic converter performs two simultaneous tasks of oxidation of carbon monoxide to carbon dioxide and oxidation of hydrocarbons to carbon dioxide and water • Oxidation of carbon monoxide to carbon dioxide: CO + O2 → 2CO2 (carbon monoxide) (oxygen) (corban-di-oxide) • Oxidation of hydrocarbons (unburned and partially burned fuel) to carbon dioxide and water: CₓH₂ₓ₊₂ +[(3x+1)/2] O2 → xCO2 + (x+1) H2O Hydrocarbon (oxygen) (carbon-di-oxide) (water) (alkane) • Disadvantage: inability to control oxides of nitrogen
  15. 15. 15 Three-way Catalytic converter • It converts harmful gases(Nox, co, HC) in the engine exhaust to relatively harmless gases(N2, Co2, H2O). •A three-way catalytic converter makes use of two catalysts to convert harmful gases to harmless gases. They are oReduction Catalyst(platinum and rhodium) oOxidation Catalyst(platinum and palladium) • Stage 1 2NO → N2 + O2 (oxides of nitrogen) (nitrogen) (oxygen)
  16. 16. 16 Stage 2:in this stage oxidation occurs as in two way catalytic converter • 3-way catalytic converters are so named because they are capable of eliminating three pollutants – NOx, CO and HC
  17. 17. 17 Pollutantsingramperkilometres
  18. 18. 1818 Advantages and Disadvantages • Advantages o Reduce the amount of harmful pollution produced by the vehicles o Faster reactions o Easy replaceable • Disadvantages: o Decreased horsepower-engine uses more energy for the converter o Catalyst require some time to start its action o they are very expensive to get
  19. 19. CONCLUSION •Vehicular emissions produces the CO, HC and NOx these emission are reduced by using catalytic converters. •The two-way oxidation catalytic converter that are reduces the effect produced by CO,HC. •The three-way oxidation catalytic converter that are reduces the effect produced by CO,HC and Nox, •catalytic converters are play a major role in reduction of emission produced by the vehicles. 19
  20. 20. REFERENCES  Air injection and Catalytic converters by Matthew Whitten Brookhaven College  Catalystor.pdf that gives complete information.  https://www.dieselnet.com/tech/catalysts.php-gives introduction, baground  http://www.ecmaindia.in/emission-control-technology  http://www.carparts.com/classroom/emission.htm-gives the emissions control devices.  http://auto.howstuffworks.com/coal-rollers3.htm-gives a emission by vehicle  Mechteacher.com-gives information about the three way catalytic converter 20
  21. 21. 21

×