Claim 5 “Biodiesel produces as much or more emissions of carbon dioxide, compared to petroleum...
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Claim 5 “Biodiesel produces as much or more emissions of carbon dioxide, compared to petroleum diesel, and therefore is not any ‘greener’ than petroleum diesel.” Jason Salazar, Andrew Peabody, Tram Nguyen, Samantha Tanner
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Transcript of Claim 5 “Biodiesel produces as much or more emissions of carbon dioxide, compared to petroleum...
Claim 5
“Biodiesel produces as much or more emissions of carbon dioxide, compared topetroleum diesel, and therefore is not any ‘greener’ than petroleum diesel.”
Jason Salazar, Andrew Peabody, Tram Nguyen, Samantha Tanner
Overview
Compare the emission of carbon dioxide in combustion of petrodiesel and biodiesel.
Decide whether biodiesel is in fact ‘greener’ than petrodiesel.
Compare the lifecycle of carbon dioxide emissions in petrodiesel and biodiesel.
Definitions of ‘greener’
Beneficial to the environment: green recycling policies.
Favoring or supporting environmentalism: green legislators who strengthened pollution controls.
The American Heritage® Dictionary of the English Language, Fourth Edition.
Petrodiesel Combustion
2C12H26 + 37O2 → 24CO2 + 26H2O + E
340g petrodiesel → 1060g carbon dioxide
1g petrodiesel → 3g carbon dioxide
Petrodiesel Combustion
2C12H26 + 37O2 → 24CO2 + 26H2O + E
340g petrodiesel → 1060g carbon dioxide
1g petrodiesel → 3g carbon dioxide
Biodiesel Combustion
C20H36O2 + 29O2 → 20CO2 + 18H2O + E
310g Biodiesel → 880g Carbon Dioxide
1g Biodiesel → 3g Carbon Dioxide
Biodiesel Combustion
C20H36O2 + 29O2 → 20CO2 + 18H2O + E
310g Biodiesel → 880g Carbon Dioxide
1g Biodiesel → 3g Carbon Dioxide
Petrodiesel vs. Biodiesel
1g of either petrodiesel or biodiesel both create about the same amount of carbon dioxide at 3grams.
Carbon dioxide is among the least effective (at heat trapping) of the greenhouse gases.
0
0.5
1
1.5
2
2.5
3
Carbon Dioxide (g)
Petrodiesel
Biodiesel
Global Atmospheric Concentration of Greenhouse Gases (1992)
0
50
100
150
200
250
300
350
400
Carbon Dioxide (ppm) Methane (ppm) Nitrous Oxide (ppm) CFC-11 (ppm) CFC12 (ppm)
Intergovernmental Panel on Climate Change, 1996.
Photosynthesis
Photosynthesis
6CO2 + 12H2O + light → C6H12O6 + 6O2 + 6H2OCarbon Dioxide + Water + Light energy → Glucose + Oxygen + Water
Net CO2 Life Cycle Emissions
NREL, 1998.
References
The American Heritage® Dictionary of the English Language, Fourth Edition. An Overview of Biodiesel and Petroleum Diesel Life Cycles. National Renewable Energy Laboratory, 1998. Wikipedia: The Free Encyclopedia. 23 Oct. 2005. Wikimedia Foundation. 23 Oct. 2005 <http://en.wikipedia.org>. Intergovernmental Panel on Climate Change, Climate Change 1995: The Science of Climate Change Cambridge, UK:
Cambridge University Press, 1996. Campbell, Biology 7th Ed. New York: Benjamin Cummings, 2004. 18 Nov. 2006 http://www.wiseenergy.ca/index_files/biodiesel.htm 27 Nov. 2006 http://chemfinder.cambridgesoft.com
Which do you want next to your home?
