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Title: Pollutant emissions and environmental assessment of ethyl 3-ethoxybutyrate, a potential renewable fuel

Renewable and bio-based transportation fuel sources can lower the life-cycle greenhouse gas emissions from vehicles. Here, we present an initial assessment of ethyl 3-ethoxybutyrate (EEB) as a biofuel in terms of its performance as a fuel oxygenate and its persistence in the environment. EEB can be produced from ethanol and poly-3-hydroxybutyrate, a bacterial storage polymer that can be produced from non-food biomass and other organic feedstocks. The physicochemical properties of EEB and fuel-relevant properties of EEB-gasoline blends were measured, emissions of criteria pollutants from EEB as a gasoline additive in a production vehicle were evaluated, and fate and persistence of EEB in the environment were estimated. EEB solubility in water was 25.8 g/L, its Kow was 1.8, and its Henry's Law constant was 1.04 x 10-5 atm-m3/mole. The anti-knock index values for 5% and 20% v/v EEB-gasoline blends were 91.6 and 91.9, respectively. Reductions in fuel economy were consistent with the level of oxygenation, and criteria emissions were met by the vehicle operated over the urban dynamometer driving cycle (FTP 75). Predicted environmental persistence ranged from 15 d to 30 d which indicates that EEB is not likely to be a persistent organic pollutant. Combined, these results suggest a highmore » potential for the use of EEB as a renewable fuel source.« less
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [5] ;  [6] ;  [5]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Alabama, Tuscaloosa, AL (United States); Northwestern Univ., Evanston, IL (United States). Feinberg School of Medicine
  3. Univ. of Alabama, Tuscaloosa, AL (United States); Nevada State College, Henderson, NV (United States)
  4. Univ. of Alabama, Tuscaloosa, AL (United States)
  5. C/e-Solutions, Inc., Carmel, IN (United States)
  6. C/e-Solutions, Inc., Carmel, IN (United States); Vitruvian Energy, SPC, Seattle, WA (United States)
Publication Date:
OSTI Identifier:
1295149
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Environmental Science and Pollution Research International
Additional Journal Information:
Journal Name: Environmental Science and Pollution Research International; Journal ID: ISSN 0944-1344
Publisher:
Springer
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 09 BIOMASS FUELS poly-3-hydroxybutyrate (PHB); biofuels; criteria pollutants; fuel oxygenates; dynamometer; multimedia analysis; environmental persistence