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Title:   Author  item
                                            SOUMARE, SORY - Iowa State Universityitem
                                            Schmer, Martyitem
                                            Jin, Virginiaitem
                                            Mitchell, Robert

                                                         - *Rob*
  Submitted to: Meeting Abstract
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 10/12/2015
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: The US is promoting and developing low carbon fuel sources. Perennial bioenergy crops such as switchgrass (Panicum virgatum L.) are one viable source for low carbon transportation fuels. The objective is to determine the net greenhouse gas (GHG) emissions from  different conversion methods (pyrolysis, gasification, and fermentation) using switchgrass as a bioenergy feedstock using the Greenhouse Gas, Regulated Emissions, and Energy use in Transportation (GREET) model. We used the CenUSA system plots located near Ithaca, Nebraska from data collected in 2013 and 2014 for switchgrass (cv. ‘Liberty’) which was established in 2012.  All three conversion methods  (pyrolysis, gasification,  fermentation) met the EPA proposed renewable fuel standard (RFS) as an advanced biofuel with emissions ranging from 8.2 to 18.6 g of carbon dioxide equivalents per megajoule of biofuel.  Emission variation was the result of conversion processes and switchgrass annual yield.  Further research is needed to determine the economic viability of these conversion processes.


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