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Title: Discovery of novel octane hyperboosting phenomenon in prenol biofuel/gasoline blends

Abstract

This work describes the first documented case of an effect defined herein as 'octane hyperboosting' by an oxygenated fuel compound, 3-methyl-2-buten-1-ol (prenol). Octane hyperboosting is characterized by the Research Octane Number (RON) of a mixture (e.g. an oxygenate biofuel blended into gasoline) exceeding the RON of the individual components in that mixture. This finding counters the widely held assumption that interpolation between the RON values of a pure compound and the base fuel provides the bounds for the RON performance of the blend. This is clearly distinct from the more commonly observed synergistic blending of oxygenates with gasoline, where the RON never exceeds the performance of the highest performing component. Octane hyperboosting was observed for blends of prenol and six different gasoline fuels with varying composition. Testing of compounds chemically similar to prenol yielded no qualitatively similar instances of octane hyperboosting, which suggests that the effect may not be widespread among fuel candidates. The phenomenon suggests an unexplored aspect of autoignition kinetics research for fuel blends, and may provide a new mechanism for significantly increasing fuel octane number, which is necessary for increasing combustion efficiency in spark ignition engines. This phenomenon also increases the potential candidate list of biofuels, asmore » compounds hitherto discounted due to their lower pure component RON may exhibit hyperboosting behavior, and thereby enhanced performance, in blends.« less

Authors:
 [1];  [2];  [3];  [3];  [4];  [1];  [2]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1492507
Report Number(s):
NREL/JA-5400-73186
Journal ID: ISSN 0016-2361
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Fuel
Additional Journal Information:
Journal Volume: 239; Journal Issue: C; Journal ID: ISSN 0016-2361
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; octane; hyperboosting; synergistic blending; prenol; biofuel; RON; combustion

Citation Formats

Monroe, Eric, Gladden, John, Albrecht, Karl O., Bays, J. Timothy, McCormick, Robert, Davis, Ryan W., and George, Anthe. Discovery of novel octane hyperboosting phenomenon in prenol biofuel/gasoline blends. United States: N. p., 2018. Web. doi:10.1016/j.fuel.2018.11.046.
Monroe, Eric, Gladden, John, Albrecht, Karl O., Bays, J. Timothy, McCormick, Robert, Davis, Ryan W., & George, Anthe. Discovery of novel octane hyperboosting phenomenon in prenol biofuel/gasoline blends. United States. doi:10.1016/j.fuel.2018.11.046.
Monroe, Eric, Gladden, John, Albrecht, Karl O., Bays, J. Timothy, McCormick, Robert, Davis, Ryan W., and George, Anthe. Thu . "Discovery of novel octane hyperboosting phenomenon in prenol biofuel/gasoline blends". United States. doi:10.1016/j.fuel.2018.11.046.
@article{osti_1492507,
title = {Discovery of novel octane hyperboosting phenomenon in prenol biofuel/gasoline blends},
author = {Monroe, Eric and Gladden, John and Albrecht, Karl O. and Bays, J. Timothy and McCormick, Robert and Davis, Ryan W. and George, Anthe},
abstractNote = {This work describes the first documented case of an effect defined herein as 'octane hyperboosting' by an oxygenated fuel compound, 3-methyl-2-buten-1-ol (prenol). Octane hyperboosting is characterized by the Research Octane Number (RON) of a mixture (e.g. an oxygenate biofuel blended into gasoline) exceeding the RON of the individual components in that mixture. This finding counters the widely held assumption that interpolation between the RON values of a pure compound and the base fuel provides the bounds for the RON performance of the blend. This is clearly distinct from the more commonly observed synergistic blending of oxygenates with gasoline, where the RON never exceeds the performance of the highest performing component. Octane hyperboosting was observed for blends of prenol and six different gasoline fuels with varying composition. Testing of compounds chemically similar to prenol yielded no qualitatively similar instances of octane hyperboosting, which suggests that the effect may not be widespread among fuel candidates. The phenomenon suggests an unexplored aspect of autoignition kinetics research for fuel blends, and may provide a new mechanism for significantly increasing fuel octane number, which is necessary for increasing combustion efficiency in spark ignition engines. This phenomenon also increases the potential candidate list of biofuels, as compounds hitherto discounted due to their lower pure component RON may exhibit hyperboosting behavior, and thereby enhanced performance, in blends.},
doi = {10.1016/j.fuel.2018.11.046},
journal = {Fuel},
issn = {0016-2361},
number = C,
volume = 239,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
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