Transcript UFuelsPresentationRev3.pptx

Evaluating Opportunities for Reducing Life-Cycle, Well-to Pump GHG Emissions from
Conventional and Unconventional Fuels
K.E. Kelly, J. Dumas, A.F. Sarofim, and D.W. Pershing
University of Utah
Resource Extraction and Upgrading
Power for CO2 capture
Oil shale
Oil sands
Crude oil
Upgrading
Opportunity: Oxyfiring for CO2 capture
Transportation
Refining
Opportunity: Improved efficiency
Opportunity: Oxyfiring for CO2 capture
Distribution
Evaluation of Improving Process Heater Efficiency to
Reduce GHG Emissions from Refineries
Evaluation of Oxyfiring for CO2 Capture to Reduce GHG
Emissions from Refining
16
16
14
14
12
Transport
8
Refining
Transport to refinery
6
Recovery
Well-to-Pump Life Cycle GHG Emissions from Conventional
and Unconventional Transportation Fuels
4
G CO2 equiv./MJ fuel
10
10
Transport
Refining - other
8
Refining - oxyfiring
Rec & transp
6
Upstream CO2 capture
4
2
70
0
Conventional refinery (85%
efficient Proc Heaters)
Refinery (95% efficiency)
63 - 80
Refinery (97% efficiency)
2
60
0
Baseline
38 - 62
Process Heat
Efficiency
Oxy case 1
Oxy case 2
Oxy case 3
50
g CO2 equiv/MJ fuel
g CO2 equiv./MJ
12
Transport
40
Refining
27-36
27-35,
55*
Transport to refinery
H production
30
Upgrading/retorting
Recovery
20
14 - 21
10
0
Conventional
gasoline GREET
72 g CO2 equiv./MJ fuel
Oil Sands surface
GREET
Oil Sands in situ
GREET
Oil shale Shell in situ Green River oil shale
Brandt (2008)
ATP (Brandt, 2008)
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.