Co-generation, Ethanol Production and CO2 Enhanced Oil Recovery
Model for Environmentally and Economically Sound Linked Energy Systems

Kansas Geological Survey
Open-file Report 2002-6

Potential Energy Gains and CO2 Avoided on Annual Basis

Model Assumptions:

25 million gallon/year ethanol plant running at full capacity
Plant is currently running at 25 million gallon/year rate and may increase to 40 million gallons /year in 2002\
15 Mw co-generation running at full capacity
Co-generation is in testing phase and generation is scheduled for 2nd quarter 2002
Entire CO2 stream is used for EOR
CO2 stream is currently being vented. Food grade liquifaction facilities are planned. 10-20% of CO2 stream will be trucked to pilot site for demo flood. This model assumes that all CO2 is captured and transported via high pressure pipeline and used for EOR.
Net utilization = CO2 sequestered = 4.3 MCF/BO recovered
Net utilization projected in current DOE project and actual could be higher or lower. This is assumed = CO2 retained, understanding that actual retention does not necessarily equal net utilization.
Distiller Dried Grains (DDG) offset cattle grain feed
DDG are currently being marketed.

Methodology for Calculating Energy Gained and CO2 Avoided

The linking together of the energy systems outlined in this poster will result in both gains and savings of energy, while avoiding the emissions of carbon dioxide (CO2) in the process. Calculating these values was achieved by taking a life-cycle approach and determining savings or gains in energy in the linked systems as compared to each process operating independently. All systems were assumed to operate at full capacity.

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Last updated March 2002