Vehicle Emissions Flashcards
Which gas runs leaner?
Diesels
What does Diesels produce?
Particles (smoke)
What does 3-way catalytic converter do?
Decreases HCs, CO and NOx
Disadvantage of Diesels?
More SOx
Country where Photochemical Smog is first recognised?
LA and Japan
What does photochemical smog need?
NOx, HCs and sunlight
How does photochemical smog occur?
HC free radicals oxidise NO to NO2 without ozone which accumulates
Disadvantages of ozone?
Case coughing, wheezing in healthy individuals, damage crops
Hazard of aldehydes and peroxy acetyl nitrate?
aldehyde - eye irritation, peroxy acetyl nitrate - very toxic
Problems of alternative fuels
gases - high molar volume - storage problem
Hydrogen as anlternative fuel
high heat of combustion
Advantage of renewable fuels
they dont add CO2
Electric vehicles
Have short range
