Moles of carbon dioxide admitted per mole of hydrocarbon when 100 grams is burned.
Gasoline (C8H18)
2 C8H18 + 25 O2 → 16 CO2 + 18 H2O
100g __ __ = .8772 moles of gasoline
(8*12) + (18*1)
Moles of carbon dioxide produced per mole of gasoline
.8772 moles of gasoline * __8 moles of CO2_ = 7.018 moles of CO2
1 mole of gasoline
Grams of CO2 produced per mole of gasoline burned:
7.018 moles of CO2 * __44 grams__ = 308.8 grams of CO2
1 mole of CO2
Diesel (used the formula for hexane (C16H34) in this calculation)
2 C16H34 + 49 O2 → 32 CO2 + 34 H2O
100g __ __ = .4425 moles of diesel
(16*12) + (34*1)
Moles of carbon dioxide produced per mole of diesel
.4425 moles of diesel * _16 moles of CO2_ = 7.080 moles of CO2
1 mole of diesel
Grams of CO2 produced per mole of diesel burned:
7.080 moles of CO2 * __44 grams__ = 311.5 grams of CO2
1 mole of CO2
Bio-diesel (C19 H36 O2)1
C19 H36 O2 + 27 O2 → 19 CO2 + 18 H2O
100g __ __ __ = .3378 moles of bio-diesel
(19*12) + (36*1) + (2*16)
Moles of carbon dioxide produced per mole of bio-diesel
.3378 moles of bio-diesel * _19 moles of CO2_ = 6.418 moles of CO2
1 mole of bio-diesel
Grams of CO2 produced per mole of bio-diesel burned:
6.418 moles of CO2 * __44 grams__ = 282.4 grams of CO2
1 mole of CO2
1
2
http://www.bio-power.co.uk/about.htm
http://tonto.eia.doe.gov/oog/info/gdu/gasdiesel.asp
http://www.eia.doe.gov/oil_gas/petroleum/data_publications/wrgp/mogas_chart.gif
According to Energy Information Administration, the gasoline price has risen about 12%
in the past week from $3.389 to $3.508 per gallon. Diesel prices have been raised to
$4.143 per gallon with an 8% increase. 2
Cost
Gasoline
Cost/gallon: $3.508/gallon
Cost/barrel: _$3.508_ * 42 gallons = $147.34/barrel
1 gallon
1 barrel
Cost/kilo joule:
_$3.508_ * _1 gallon__ * 1 Btu__ = $2.682 * 10-5 / kJ
1 gallon
124000 Btu 1.055kJ
1 gallon of gasoline = 124,000 Btu
Diesel
Cost/gallon: $4.143/gallon
Cost/barrel: _$4.143_ * 42 gallons = $174.01/barrel
1 gallon
1 barrel
Cost/kilo joule:
_$4.143_ * _1 gallon__ * 1 Btu__ = $2.825 * 10-5 / kJ
1 gallon
139000 Btu 1.055kJ
Energy Produced by fuels
Gasoline
Amount of energy from a gallon of gasoline produces:
34.2 MJ * _3.78 L_ * 1000 KJ = 1.29 * 105 KJ/gallon
1L
1 gallon
1 MJ
Diesel
Amount of energy a gallon of diesel fuel produces:
38.6 MJ * _3.78 L_ * 1000 KJ = 1.46 * 105 KJ/gallon
1L
1 gallon
1 MJ
Byproducts
Major products of burning fuels include water and carbon dioxide. Some byproducts that
form include nitrogen oxides, carbon monoxide, unburned hydrocarbons, hydrogen,
radon, and benzopyrene (can cause cancer).
Diesel
Sulfur, manganese,
Bio-diesel
Glycerol,
http://www.epa.gov/iaq/combust.html
Chemistry
Gasoline
Gasoline is a hydrocarbon that is composed of only hydrogen and carbon molecules. The
chemical formula for gasoline is C8H18. When gasoline is burned with the help of oxygen
molecules, carbon dioxide and water are produced. The burning of gasoline called a
combustion reaction. Gasoline is formed from crude oil in which gasoline occupies about
half of its composition in a barrel. The negative aspects of gasoline are that it produces
too much carbon particles and contribute to global warming. A complete combustion
reaction is supposed to produce only carbon dioxide and water as its product; however,
there are many byproducts released from the combustion of gasoline.
Diesel
http://static.howstuffworks.com/gif/diesel-2.jpg
When crude oil is refined, it can be separated into different fuels including diesel fuel. It
takes more time for diesel fuel to evaporate than for gasoline. Diesel produces more
energy comparing to gasoline. This is why diesel powered vehicles get more mileage. It
produces less amount of carbon monoxide. However, some components from burning
diesel fuel can cause acid rain.
http://hypertextbook.com/facts/2006/TatyanaNektalova.shtml
Bio-diesel can be combined with diesel or it can be burned in vehicles by itself. It is
mainly made from vegetable oils or animal fats.
1 barrel of residual fuel oil = 6,287,000 Btu