scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 1,720
Catalytic Converters What is a catalytic converter and how does it do what they do The term Catalytic Converter covers the stainless steel box mounted in the exhaust system Inside the cover is the catalyst a ceramic or metallic base with an active coating incorporating alumina ceria and other oxides and combinations of the precious metals platinum palladium and rhodium The base can be protected from vibration and shock by a resilient ceramic or metallic mat The main by-products of combustion are Nitrogen gas N2 Our atmosphere is 78 percent nitrogen gas and most of this passes right through the car engine Carbon Dioxide CO2 A harmless odorless gas composed of carbon and oxygen It is also a greenhouse gas that contributes to global warming Water vapor H2O Another by-product of combustion The hydrogen in the fuel bonds with the oxygen in the air These three emissions are mostly harmless although carbon dioxide emissions are believed to contribute to global warming However since the combustion process is never perfect other more harmful emissions are produced in the process Carbon monoxide CO A colorless odorless gas It is poisonous and extremely dangerous in confined areas building up slowly to toxic levels without warning if adequate ventilation is not available Hydrocarbons or volatile organic compounds VOCs Any chemical compound made up of hydrogen and carbon Oxides of nitrogen NOx Chemical compounds of nitrogen they combine with hydrocarbons to produce smog These are the three main regulated emissions and also the ones that catalytic converters are designed to reduce Catalytic converters can either be an oxidation or three-way type Oxidation catalysts convert carbon monoxide CO and hydrocarbons HC to carbon dioxide CO2 and water but have little effect on nitrogen oxides NOx and particulate matter Three-way catalysts operate in a closed-loop system together with a lambda or oxygen sensor to regulate the airfuel ratio on gasoline engines The catalyst can then at the same time oxidize CO
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA