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Selection Criteria and Screening of Potential Biomass-Derived Streams as Fuel Blendstocks for Advanced Spark-Ignition Engines
- Robert L. McCormick - National Renewable Energy Laboratory ,
- Gina Fioroni - National Renewable Energy Laboratory ,
- Lisa Fouts - National Renewable Energy Laboratory ,
- Earl Christensen - National Renewable Energy Laboratory ,
- Janet Yanowitz - Ecoengineering Inc. ,
- Evgueni Polikarpov - Pacific Northwest National Laboratory ,
- Karl Albrecht - Pacific Northwest National Laboratory ,
- Daniel J. Gaspar - Pacific Northwest National Laboratory ,
- John Gladden - Sandia National Laboratory ,
- Anthe George - Sandia National Laboratory
ISSN: 1946-3952, e-ISSN: 1946-3960
Published March 28, 2017 by SAE International in United States
Citation: McCormick, R., Fioroni, G., Fouts, L., Christensen, E. et al., "Selection Criteria and Screening of Potential Biomass-Derived Streams as Fuel Blendstocks for Advanced Spark-Ignition Engines," SAE Int. J. Fuels Lubr. 10(2):442-460, 2017, https://doi.org/10.4271/2017-01-0868.
We describe a study to identify potential biofuels that enable advanced spark ignition (SI) engine efficiency strategies to be pursued more aggressively. A list of potential biomass-derived blendstocks was developed. An online database of properties and characteristics of these bioblendstocks was created and populated. Fuel properties were determined by measurement, model prediction, or literature review. Screening criteria were developed to determine if a bioblendstock met the requirements for advanced SI engines. Criteria included melting point (or cloud point) < -10°C and boiling point (or T90) <165°C. Compounds insoluble or poorly soluble in hydrocarbon were eliminated from consideration, as were those known to cause corrosion (carboxylic acids or high acid number mixtures) and those with hazard classification as known or suspected carcinogens or reproductive toxins. Compounds predicted to be less anaerobically biodegradable than methyl-tert-butyl ether with water solubility greater than 10,000 mg/L were also eliminated. A minimum Research octane number (RON) of 98 was applied. These criteria produced a list of 40 bioblendstocks with promising properties. Additional property data, including Motor octane number (MON), heat of vaporization, and lower heating value, were acquired for these bioblendstocks. A subset of the bioblendstocks representing all functional groups were blended into gasoline or a gasoline surrogate to measure their effect on vapor pressure, distillation curve, oxidation stability, RON, and MON. For blending into a conventional or reformulated blendstock for E10 blending, ethanol, 2-butanol, isobutanol, and diisobutylene have the most desirable properties for blending of a high-octane advanced SI engine fuel.