Post on 14-Dec-2015
Biofuel Jeopardy!
Waterford Union High School
Rules
• Each team sends one person per turn. They cannot get help from their team
• First to “buzz” in gets 15 seconds to answer. • If the first person to buzz cannot get the answer, the
second team can buzz in. Once they buzz in, they too have 15 seconds. They also cannot get help.
• You either gain or lose points on each turn.• If no team buzzes within 10 seconds, the question
ends and the answer is given.
$100 $100 $100 $100 $100 $100
$200 $200 $200 $200 $200 $200
$300 $300 $300 $300 $300 $300
$400 $400 $400 $400 $400 $400
$500 $500 $500 $500 $500 $500
Fossil Fuel Facts
Combustion Concepts
CO2: Get a Clue
BiofuelBenefits
Transester-rification
EngineInterest
Fossil Fuel Facts
• Fossil fuels currently provide ___% of energy used in the United States
• 85%
Fossil Fuel Facts
• Fossil fuels formed from…• Dead plants and animals
Fossil Fuel Facts
• These are all of the elements found in a hydrocarbon
• Hydrogen and Carbon
Fossil Fuel Facts
• Petroleum products are separated from each other by ___ the crude petroleum.
• Heating (or boiling)
Fossil Fuel Facts
• In order for a hydrocarbon to form, organic matter had to be exposed to intense ______ and ______
• Heat and pressure
Combustion Concepts
• These are the two byproducts of combustion of fuel
• Carbon dioxide and water
Combustion Concepts
• Combustion is an ____________ reaction• Exothermic
Combustion Concepts
• Soot and carbon monoxide occur when a combustion reaction ____________
• Does not occur completely
Combustion Concepts
• For something to burn more cleanly, it has to burn more_______
• Completely
Combustion Concepts
• A reaction that absorbs energy would be called an ________ reaction
• Endothermic
CO2: Get a Clue
• CO2 consists of the following molecules• One carbon and two oxygens
CO2: Get a Clue
• This process absorbs CO2 from the atmosphere
• Photosynthesis
CO2: Get a Clue
• How does CO2 change surface temperatures?• It absorbs and re-emits solar radiation,
slowing its release into space
CO2: Get a Clue
• CO2 levels are currently at _____ppm• 395 ppm
CO2: Get a Clue
• US Citizens contribute _____% of CO2 emissions
• 25% (5x their proportion of the world’s population)
Biofuel Benefits
• What does it mean that ethanol and biodiesel are “carbon neutral”?
• There are no net emissions of carbon dioxide
Biofuel Benefits
• If ethanol produces carbon dioxide when it is burned, how can it be “carbon neutral”?
• The crops that are used to produce ethanol absorb the CO2 that is released when it is burned
Biofuel Benefits
• When combusted, ethanol releases ________ energy than it requires to be produced
• More
Biofuel Benefits
• Ethanol will have a ____ gas mileage compared to gasoline
• Lower
Biofuel Benefits
• Ethanol burns more completely because of what element found in its molecular structure?
• Oxygen
Transesterification
• Transesterification is a chemical reaction in which the branched chains of an oil molecule are….
• Straightened out
Transesterification
• Besides oil, transesterification involves what other two ingredients?
• Methanol and a catalyst (such as KOH)
Transesterification
• To what temperature must the oil be heated to in order for transesterification to occur?
• 55-57o
Transesterification
• To wash biodiesel, we must use….• Filtered water
Transesterification
• Drying biodiesel means to ….• Remove all water after washing
Engine Interest
• The energy in fuel is converted into motion how?
• The fuel explodes, pushing down a piston that turns a crankshaft
Engine Interest
• In order for combustion to occur in a gasoline engine, you need a ________ _______
• Spark Plug.
Engine Interest
• Combustion in a diesel engine is created by …• Compressing diesel fuel until it heats to the
point of combustion
Engine Interest
• Diesel engines are more efficient because why?
• The compressed air has a higher concentration of oxygen
Engine Interest
• The first diesel engine ran on …• Peanut Oil
FINAL JEOPARDY
• Make your wagers!
• Combustion of octane produces ___ times more CO2 than the combustion of ethanol
• Four times (8 CO2 vs. 2 CO2)