Fossil-Fuel Based Carbon Dioxide Emissions METO658A: Carbon Cycle and Climate Jay Gregg 2/15/06
Dec 19, 2015
Fossil-Fuel Based Carbon Dioxide Emissions
METO658A: Carbon Cycle and Climate
Jay Gregg2/15/06
Outline
• Background: Fossil Energy and CO2
• Geological Formation
• Resource Extraction
• Fuel Chemistry, Refining and Combustion
• Current Emissions
• Your Carbon Footprint
• Future
Outline
• Background: Fossil Energy and CO2
• Geological Formation
• Resource Extraction
• Fuel Chemistry, Refining and Combustion
• Current Emissions
• Your Carbon Footprint
• Future
Background Fossil Fuels
http://www.pekerinsaat.com/pipe_line/pipe1.jpghttp://www.gulfstreamgas.com/images/flame.jpghttp://www.4to40.com/images/earth/science/petroleum/oil_extracting_machinery_derrick.jpg http://next.web-cars.com/monterey_img/74-8_s.jpg
http://tammi.tamu.edu/photos/Coal%20%20Stacks.JPGhttp://collections.ic.gc.ca/cnphoto/images/cn_today/45.jpg
http://www.sachsreport.com/electricity%20grid%20is%20one%20giant%20machine.jpg
Natural Gas
Petroleum(Oil)
Coal
Provide 85% of the energy used by humans on Earth
Produce CO2 when combusted
Background Global Carbon Cycle
http://earthobservatory.nasa.gov/Library/CarbonCycle/carbon_cycle4.html
2002 Anthropogenic Emissions= 6.995 GtC (CDIAC)
Background Atmospheric CO2 Reservoir
General increase likely due to anthropogenic sources
Atmospheric Carbon Dioxide
300
310
320
330
340
350
360
370
380
390
1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005
Year
Con
cen
trati
on
(p
pm
)
Antarctica
Mauna Loa
Seasonal pattern is due to Earth’s respiration
20% increase in CO2 in the last 50 years
BackgroundTemperature Record
Today's atmospheric CO2 concentrations are the highest in the last 420,000 years; maybe in the last 20 million years.
The rate of increase in atmospheric CO2 over last 100 years has not been seen in at least 20,000 years.
Global mean temperature has increased by 0.6 to 1o C in the last century
1990s the hottest decade on record, 1998 the hottest year
Sea rise of 10 to 20 cm last century; 40% decline in Arctic Sea ice
IPCC- Climate Change 2001: The Scientific Basis
Outline
• Background: Fossil Energy and CO2
• Geological Formation
• Resource Extraction
• Fuel Chemistry, Refining and Combustion
• Current Emissions
• Your Carbon Footprint
• Future
Coal
http://encyclopedia.farlex.com
vegetation accumulates, but is prevented from full decay, forming peat beds
peat is sandwiched between layers of sediment and is compressed to from lignite
bituminous coal forms after further compression and heat, removing water
anthracite coal forms after further heat and compression, removing methane
seam
Coal
Oil and Gas
http://encyclopedia.farlex.com
marine plants and animals die and are trapped beneath layers of sediment where they are broken down anaerobic bacteria
increasing heat and pressure transform the hydrocarbons into fatty acids, which are then changed into an asphaltic material, keragen
further increases in temperature and pressure cause oil to form
natural gas collects above the oil, and is also dissolved in the oil
gasoil
Oil
Source: EIA, Oil & Gas Journal, 12/23/02. Copyright: Pennwell Publications, 2002.
Gas
Outline
• Background: Fossil Energy and CO2
• Geological Formation
• Resource Extraction
• Fuel Chemistry, Refining and Combustion
• Current Emissions
• Your Carbon Footprint
• Future
CoalOpen Surface Mining
Mountain Top Removal Mining
Underground Mining
http://www.siahq.org/Images/lehighvalley/lmishkar/coalmine.gif
http://www.ohvec.org/galleries/mountaintop_removal/007/43.jpghttp://66.113.204.26/mining/coal/surf_min1.jpg
http://www.krunk.org/ns-nrv/vsalem/coal-train-at-salem-medium.jpg
Oil
http://www.novoenergytech.com/images/Tex-oil%20well%20005.jpghttp://shiftingbaselines.org/blog/images/offshore-oil-rig.jpg
http://www.maric.com.cn/images/ship/150000t-1.jpghttp://www.eas.purdue.edu/~braile/edumod/eqhazard/eqhazard2_files/image012.jpg
Gas
http://www.berkshiremoody.com/images/natural_gas_well.jpg
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10313http://www.shell-usgp.com/images/6_lng-tanker-at-sea-_web.jpg
http://www.marxists.org/history/ussr/art/photography/workers/russia/siberia/taiga/natural-gas.jpg
Gas Flaring
http://www.eia.doe.gov/emeu/cabs/images/subafricagasflare.gif
http://arcticgems.org/ps/downloads/gas_flaring_low.jpg
Prudhoe Bay, AK Flares
“Every year, roughly 108 billion cubic meters of natural gas are flared around the world and global carbon dioxide (CO2) emissions from flaring amount to nearly 10 percent of the emissions that countries have committed to reduce under the Kyoto Protocol for the target period 2008–2012”(World Bank)
Region Flared gas
(bcm)
Share of world total (%)
Africa 37 34
Asia-Oceania 11 10
Europe 3 3
FSU 19 18
Central and South America 10 9
Middle East 16 15
North America 12 11
WORLD 108 100%
Venting of natural gas also leads to climate forcing, as CH4 is a more potent greenhouse gas than CO2. Moreover, 3% of U.S. commercial gas is lost in distribution (EIA; Gregg).
Outline
• Background: Fossil Energy and CO2
• Geological Formation
• Resource Extraction
• Fuel Chemistry, Refining and Combustion
• Current Emissions
• Your Carbon Footprint
• Future
Saturated Hydrocarbons (Alkanes)
H
H
HH C MethaneCH4
PropaneC3H8
H
H
H
H
H
CH C
H
C H
H
H
H
H
H
H
CC
H
C …AlkanesCnH2n+2
Saturated Hydrocarbons (Constitutional Isomers)
PentaneC5H12
IsopentaneC5H12
CH3
CH3
CH3CH3 C NeopentaneC5H12
H
H
H
H
H
CH C
H
C H
H
H
C
H
H
C
H
H
C
H
H
CH C
H
C H
H
H H
H
H
C
Alkanes
Name
Molecular Melting Boiling State
Formula Point (oC) Point (oC) at 25oC
methane CH4 -182.5 -164 gas
ethane C2H6 -183.3 -88.6 gas
propane C3H8 -189.7 -42.1 gas
butane C4H10 -138.4 -0.5 gas
pentane C5H12 -129.7 36.1 liquid
hexane C6H14 -95 68.9 liquid
heptane C7H16 -90.6 98.4 liquid
octane C8H18 -56.8 124.7 liquid
nonane C9H20 -51 150.8 liquid
decane C10H22 -29.7 174.1 liquid
undecane C11H24 -24.6 195.9 liquid
dodecane C12H26 -9.6 216.3 liquid
eicosane C20H42 36.8 343 solid
triacontane C30H62 65.8 449.7 solid
Unsaturated Hydrocarbons (Alkenes and Alkynes)
EthaneC2H6
H
H
H C
H
H
C H
EthyleneC2H4
H
HC
HC
H
(Lewis Structure)
H C C H
AcetyleneC2H2
H
HC
HC
H+
H
H
Ni
H
H
H C
H
H
C HHeat & Pressure
Natural Gas Refining
Liquefied and sold as LPG (Liquid Petroleum Gas or Propane)
Sold as commercial natural gas Methane CH4 70-90%
Ethane C2H6 5-10%
Propane C3H8 5-10%
Butane C4H10 0-5%
Pentane C5H12 0-5%
Carbon Dioxide CO2 0-8%
Oxygen O2 0-0.2%
Nitrogen N2 0-5%
Hydrogen sulphide H2S 0-5%
Rare gases A, He, Ne, Xe trace
http://chemed.chem.purdue.edu/genchem/topicreview/bp/1organic/coal.html
http://www.naturalgas.org/overview/background.asp
Petroleum Refining
http://www.eia.doe.gov
Petroleum Refining
Fraction
Boiling Range (oC) Number of Carbon Atoms
natural gas < 20 C1 to C4
petroleum ether 20 - 60 C5 to C6
gasoline 40 - 200 C5 to C12, but mostly C6 to C8
kerosene 150 - 260 mostly C12 to C13
fuel oils > 260 C14 and higher
lubricants > 400 C20 and above
asphalt or coke residue polycyclic
http://chemed.chem.purdue.edu/genchem/topicreview/bp/1organic/coal.html
Crude oil is a complex mixture that is between 50 and 95% hydrocarbon by weight
Over 500 different hydrocarbons in gasoline!
Gasoline Refining Principles:Branched alkanes and cycloalkanes burn more evenly than straight-chain alkanes. Short alkanes (C4H10) burn more evenly than long alkanes (C7H16). Alkenes burn more evenly than alkanes. Aromatic hydrocarbons burn more evenly than cycloalkanes.
Coal Types
e.g. C137H97O9NS
e.g. C240H90O4NS
Lignite (Brown Coal)
Bituminous (Soft Coal)
Anthracite (Hard Coal)
86% and 98% carbon by weight
69% and 86% carbon by weight
up to 70% water by weight
Peat
not valuable as a commercial fuel
Coal Gasification and Liquefaction
C(s) + H2O(g) CO(g) + H2(g) Ho = 131.3 kJ/molrxn
Coal Gas (Town Gas)
Synthetic Natural Gas (SNG)
CO(g) + 3H2(g) CH4(g) + H2O(g)
2CO(g) + 2H2(g) CH4(g) + CO2(g) Captured and Sequestered?
Methanol
CO(g) + 2H2(g) CH3OH (l)
http://chemed.chem.purdue.edu/genchem/topicreview/bp/1organic/coal.html
Combustion
CxHy + (x + y/4)O2 → xCO2 + (y/2)H2O + heat
CH4 + 2 O2 → CO2 + 2 H2O + heat
Methane Combustion:
General Combustion:
Incomplete Combustion:
Also forms CO, SO2, NOx, etc.
Outline
• Background: Fossil Energy and CO2
• Geological Formation
• Resource Extraction
• Fuel Chemistry, Refining and Combustion
• Current Emissions
• Your Carbon Footprint
• Future
Global Energy Production
Anthropogenic Emissions
0
1
2
3
4
5
6
7
81
75
0
17
60
17
70
17
80
17
90
18
00
18
10
18
20
18
30
18
40
18
50
18
60
18
70
18
80
18
90
19
00
19
10
19
20
19
30
19
40
19
50
19
60
19
70
19
80
19
90
20
00
20
10
Year
Pg
C o
r G
t C
Total
Gas
Liquids
Solids
Cement
Flaring
http://cdiac.esd.ornl.gov/ftp/ndp030/global00.ems
Increase in CO2 corresponds with a similar increase in FF Consumption
Carbon Emissions
UN, ORNL/ CDIAC, 2005
The Top 20
Rank Country2002 Emissions
Tg C% Global
Emissions Cumulative %
2002 Per Capita, Tonnes
C/person
1 United States 1592 22.8 22.8 5.52
2 China (Mainland) 957 13.7 36.5 0.74
3 Russian Federation 390 5.6 42.1 2.69
4 India 333 4.8 46.9 0.32
5 Japan 328 4.7 51.6 2.57
6 Germany 219 3.1 54.7 2.66
7 United Kingdom 145 2.1 56.8 2.50
8 Canada 141 2 58.8 4.49
9 Republic of Korea 122 1.7 60.5 2.55
10 Italy 118 1.7 62.2 2.05
11 Mexico 105 1.5 63.7 1.01
12 France 100 1.4 65.1 1.69
13 Iran 98 1.4 66.5 1.50
14 Australia 97 1.4 67.9 4.94
15 South Africa 94 1.3 69.2 2.07
16 Saudi Arabia 92 1.3 70.5 4.22
17 Brazil 85 1.2 71.7 0.49
18 Ukraine 84 1.2 72.9 1.73
19 Indonesia 84 1.2 74.1 0.39
20 Spain 83 1.2 75.3 2.03
UN, ORNL/ CDIAC, 2005
The Top 20
Rank Country2002 Emissions
Tg C% Global
Emissions Cumulative %
2002 Per Capita, Tonnes
C/person
1 United States 1592 22.8 22.8 5.52
2 China (Mainland) 957 13.7 36.5 0.74
3 Russian Federation 390 5.6 42.1 2.69
4 India 333 4.8 46.9 0.32
5 Japan 328 4.7 51.6 2.57
6 Germany 219 3.1 54.7 2.66
7 United Kingdom 145 2.1 56.8 2.50
8 Canada 141 2 58.8 4.49
9 Republic of Korea 122 1.7 60.5 2.55
10 Italy 118 1.7 62.2 2.05
11 Mexico 105 1.5 63.7 1.01
12 France 100 1.4 65.1 1.69
13 Iran 98 1.4 66.5 1.50
14 Australia 97 1.4 67.9 4.94
15 South Africa 94 1.3 69.2 2.07
16 Saudi Arabia 92 1.3 70.5 4.22
17 Brazil 85 1.2 71.7 0.49
18 Ukraine 84 1.2 72.9 1.73
19 Indonesia 84 1.2 74.1 0.39
20 Spain 83 1.2 75.3 2.03
UN, ORNL/ CDIAC, 2005
The Top 20Rank Country
2002 Emissions Tg
C% Global
Emissions Cumulative %2002 Per Capita, Tonnes C/person
At US Per Capita Emissions Tg C
1 United States 1592 22.8 22.8 5.52
2 China (Mainland) 957 13.7 36.5 0.74 7139
3 Russian Federation 390 5.6 42.1 2.69
4 India 333 4.8 46.9 0.32 5744
5 Japan 328 4.7 51.6 2.57
6 Germany 219 3.1 54.7 2.66
7 United Kingdom 145 2.1 56.8 2.50
8 Canada 141 2 58.8 4.49
9 Republic of Korea 122 1.7 60.5 2.55
10 Italy 118 1.7 62.2 2.05
11 Mexico 105 1.5 63.7 1.01
12 France 100 1.4 65.1 1.69
13 Iran 98 1.4 66.5 1.50
14 Australia 97 1.4 67.9 4.94
15 South Africa 94 1.3 69.2 2.07
16 Saudi Arabia 92 1.3 70.5 4.22
17 Brazil 85 1.2 71.7 0.49 958
18 Ukraine 84 1.2 72.9 1.73
19 Indonesia 84 1.2 74.1 0.39 1189
20 Spain 83 1.2 75.3 2.03
Global Distribution
NASA Visible Earth, Imhoff and Elvidge, 2000
Global Distribution
Saxon, Parris & Elvidge, 1997
Global Distribution
Carbon Em issions (Tg C )
0
100
G as Liquids Solids
50
Gregg, 2005
U.S. Distribution
0
5
10
15
20
25
30
35
40V
T HI
NY CT ID CA
MA
ME
NH
OR
MD FL
WA RI
VA NJ IL S
CN
CP
AA
ZM
IM
SS
DD
EW
IM
NG
AC
OT
NO
HM
ON
VA
LA
RN
EU
T IA OK
KY IN MT
NM TX
KS
LA
AK
WV
ND
WY
State
Ann
ual M
ean
Per
Cap
ita E
mis
sion
s (T
onne
s C
/Per
son)
GasLiquidsSolids
US Per Capita Emissions
US Per Capita Emissions, by State (1984-2002)
Gregg, (in prep)
U.S. Emissions by Sector
Outline
• Background: Fossil Energy and CO2
• Geological Formation
• Resource Extraction
• Fuel Chemistry, Refining and Combustion
• Current Emissions
• Your Carbon Footprint
• Future
Carbon Footprint
A personal measure of carbon emissions
E.g. Transportation
Each gallon of gas = 22 lbs CO2 = 2.7 kg C
Every mile flown = 0.9 lbs CO2 = .111 kg C
DC to Kyoto (Nagoya) = 7,057 mi x 2 x .111 kg C
= 1.5 tonnes C per person
How much CO2 is a Tonne of Carbon?1 mol C = 44/12 mol CO2 1 mol CO2 = 24.47 liters1 Tonne C = 3.667 Tonnes of CO2 3.667 Tonnes CO2 = 2,040 m3
http://www.icbe.com/carbondatabase/objectcalculator.asp
This is enough CO2 to fill two Boeing 747’s:
…or enough CO2 to fill the International Space Station:
http://members.nova.org/~sol/station/iss-sta2.jpg
http://superciliousness.com/hello/254/718/640/Australian%20767-300%20AirlinersNetPhotoID380141.jpg
Every year, the U.S. emits enough CO2 to cover its land area by 1-foot thick blanket of
CO2. (ICBE, 2000)
Outline
• Background: Fossil Energy and CO2
• Geological Formation
• Resource Extraction
• Fuel Chemistry, Refining and Combustion
• Current Emissions
• Your Carbon Footprint
• Future
Future Energy Demand
Demand increases exponentially, but how long can supplies keep up?
Peak Oil1950’s King Hubbert (a Shell Geologist) hypothesized that production would “peak” and production would decline.
Hubbert forecasted that US production would peak about 1970.
A few years after 1970, it was realized that Hubbert was correct. and the US began the era of foreign oil dependence.
Hubert predicted that global production would peak around 2000.
This could be delayed a few years by the oil embargo of the 1970s
Discoveries peaked in late 1960s
http://www.energybulletin.net/primer.php
Peak OilNew discoveries peaked in late 1960s
Production (demand) has continued to increase
Reserves are diminishing
http://www.peakoil.ie/downloads/newsletters/newsletter62_200602.pdf
(Graph: Dr. C.J. Campbell/Petroconsultants)
Energy Economics
IPCC Working Group III: Mitigation
Current Price: $65bbl
Controversy
• How much oil is there in the world (2 or 3 trillion bbls)?
• How will technology/economics change what we deem a reserve (e.g. tar sands and shale)?
• Have OPEC countries exaggerated their proven reserves to boost their quotas?
• How will OPEC manage prices after non-OPEC countries peak?
• Caspian Sea, South China Sea, Arctic, Africa- are these undiscovered elephant fields?
Implications for Carbon Cycle
1. Will climate concerns may take a “back seat” to energy security concerns? (Increase CO2)
2. Move to increased dependence on coal, syn gas, and methanol? (Increase CO2; Decrease if sequestered)
3. More attention to biofuel? (Decrease CO2? Increase CO2?)
4. More attention to renewable fuel sources? (Decrease CO2)
5. Will economic recession reduce consumption and emissions? (Decrease CO2)
6. Will an OPEC glut (for market power) make alternatives unfeasible economically? (Increase CO2)