Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
|
The percentage of nitrogen in dry air
|
78%
|
|
|
The main source of carbon monoxide
|
Atmospheric oxidation of methane gas
|
|
|
Pollutants that decrease when the air to fuel ratio increases
|
CO & VOCs
|
|
|
State of C₅ to C₁₈ hydrocarbons
|
Liquid
|
|
|
Natural sources of particulates
|
sandstroms, volcanoes,forest fires
|
|
|
The main source of nitrogen dioxide
|
Atmospheric oxidation of nitrous oxide and nitric oxide
|
|
|
Methods of controlling carbon monoxide
|
Catalytic converter, Lean burn engine, Thermal exhaust reactor
|
|
|
Effect of lean burn engines
|
Less CO and VOCs, but more nitrogen oxides
|
|
|
Conversion of Sodium Oxide from primary to secondary pollutant in the atmosphere
|
2SO2(g) + O2(g) -> 2SO3(g)
|
|
|
Human sources of VOCs
|
Petroleum extracting, refining, transporting, incomplete combustion of gasoline, coal and wood
|
|
|
Known Oxides of Nitrogen
|
Nitrous Oxide (N2O), Nitrogen Monoxide (NO) Nitrogen Dioxide (NO2)
|
|
|
5 Major Pollutants
|
Carbon Monoxide, Nitrogen Oxides, Sulfur Oxides, Volitle Organic Compounds and Particulates
|
|
|
Conversion of Nitrogen monoxide to nitrogen gas
|
2CO + 2NO -> 2CO2 + N2
|
|
|
Combustion of coal creates
|
SO2
|
|
|
Define a wet alkaline scrubber
|
Cleaning device that uses a liquid, usually water-based, to remove contaminants
|
|
|
Major pollutant groups that are primarily man-made, not natural
|
sulfur oxides, particulates, VOCs
|
|
|
Most effective method of reducing pollutants from an automobile
|
Catalytic converter
|
|
|
Primary method of reducing particulates
|
Electrostatic precipitation; ionizes particulates and attracts ions to collector plates
|
|
|
Define primary pollutant
|
Primary pollutants are added directly from pollutant sources
|
|
|
Define secondary pollutant
|
Secondary pollutants are formed from reactions in the atmosphere
|
|
|
Five major primary pollutants
|
Carbon monoxide, oxides of nitrogen, oxides of sulfur, particulates & volatile organic compounds
|
|
|
Carbon monoxide
|
colorless, odorless, tasteless, insoluble, toxic compound
|
|
|
How is carbon monoxide formed?
|
incomplete oxidation of carbon and carbon-containing compounds i.e. fossil fuels
|
|
|
How is methane formed?
|
decomposition of organic matter in swamps and tropical regions under anaerobic conditions
|
|
|
Percentage of CO production from natural sources
|
90%
|
|
|
Percentage of CO production from manmade sources
|
10%
|
|
|
Type of reaction between nitrogen and oxygen gas
|
endothermic reaction
|
