resource extraction and upgrading
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Evaluating Opportunities for Reducing Life-Cycle, Well-to Pump GHG Emissions from Conventional and Unconventional Fuels
Resource Extraction and Upgrading
Crude oil
Oil sands Oil shale
Upgrading
Refining
Opportunity: Oxyfiring for CO2 capture
Opportunity: Oxyfiring for CO2 capture
Transportation
Distribution
Power for CO2 capture
Conventional gaso-line GREET
Oil Sands surface GREET
Oil Sands in situ GREET
Oil shale Shell in situ Brandt (2008)
Green River oil shale ATP (Brandt, 2008)
0
10
20
30
40
50
60
70
TransportRefiningTransport to refineryH productionUpgrading/retortingRecovery
g CO
2 eq
uiv/
MJ f
uel
14 - 21
27-36 27-35, 55*
38 - 62
63 - 80
Baseline Process Heat Efficiency
Oxy case 1 Oxy case 2 Oxy case 30
2
4
6
8
10
12
14
16
TransportRefining - otherRefining - oxyfiringRec & transpUpstream CO2 capture
G CO
2 eq
uiv.
/MJ f
uel
Opportunity: Improved efficiency
Well-to-Pump Life Cycle GHG Emissions from Conventional and Unconventional Transportation
Fuels
Evaluation of Oxyfiring for CO2 Capture to Reduce GHG Emissions from Refining
Conventional re
finery (85% efficie
nt Proc H
eaters)
Refinery (95% efficie
ncy)
Refinery (97% efficie
ncy)0
2
4
6
8
10
12
14
16
TransportRefiningTransport to refineryRecovery
g CO
2 eq
uiv.
/MJ
Evaluation of Improving Process Heater Efficiency to Reduce GHG Emissions from
Refineries
Case 1: A gas turbine and associated steam production provides power for the ASU and CO2 purification, compression, etc.Case 2: A gas turbine provides power to the ASU and other equipment, but steam from the turbine replaces a portion of the boiler steam. This results in a lower O2 requirement, a smaller ASU, and less cooling water.Case 3: The gas turbine is run in the precombustion decarbonisation mode with part of the oxygen being used for hydrogen production and CO2 removal using MDEA.
72 g CO2 equiv./MJ fuel
K.E. Kelly, J. Dumas, A.F. Sarofim, and D.W. PershingUniversity of Utah
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