Model for Environmentally and Economically Sound Linked Energy Systems
Kansas Geological Survey
Open-file Report 2002-6
|Co-Gen Waste Heat||31,923|
|Grain Corn Replaced by Distillers Dried||49,694|
|Grains - Ethanol Process by-product|
|Enhanced Oil Recovery|
|CO2 from Ethanol Sequestered by||74,520|
|EOR (4.3 MCF/BO recovered)|
|Total Potential CO2 Avoided||156,138|
The CO2 emissions avoided for the co-gen and ethanol processes were calculated assuming that without the co-gen heat, the same amount of energy would have been generated by the use of natural gas. These results are based on a heating factor of 1,050 MCF/ft3 (EPA, 1985) of natural gas and a CO2 emission factor of120 lbs CO2/MCF of gas (EPA, 1998).
Avoided CO2 emissions from cattle feeding operations were calculated by assuming various energy inputs used diesel fuel, natural gas, or electricity and multiplying by the corresponding emission factor (White, 1998) times the number of acres that would be required for feed that was offset by DDG. Details can be provided by the authors.
CO2 sequestration benefits were assumed to be equal to the net utilization, 4.3 MCF per barrel of oil produced, which was derived in the DOE funded project. The model also assumes that the oil produced and combusted in the project merely replaces oil from non- CO2 EOR sources that would have otherwise been combusted.
|Co-generation||560 Billion BTU||$1,700,000|
|CO2 sales||1.3 BCF (75 m tons), raw||$500,000|
|Pipeline supercritical CO2||$800,000|
|EOR oil sales||260,000 Barrels oil||$5,200,000|
|Distiller's Dried Grains||Offset corn feed||$600,000|
|Total net economic gains through linkages||$8,800,000|
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Last updated March 2002