NDLI: Integrating LCA and thermodynamic analysis for sustainability assessment of algal biofuels: Comparison of renewable diesel vs. biodiesel

Content Provider	IEEE Xplore Digital Library
Author	Borkowski, M.G. Zaimes, G.G. Khanna, V.
Copyright Year	2012
Description	Author affiliation: Sustainability & Green Design Group, in the Department of Civil and Environmental Engineering at the University of Pittsburgh (Borkowski, M.G.; Zaimes, G.G.) \|\| Department of Civil and Environmental Engineering at the University of Pittsburgh (Khanna, V.)
Abstract	Advanced biofuels are attracting intense interest from government, industry and researchers as potential substitutes for petroleum gasoline and diesel transportation fuels. Microalgae's advantages as a biofuel feedstock are due particularly to their rapid growth rates and high lipid content. Several life cycle analysis (LCA) studies have been conducted on the production of biodiesel, however less attention has been paid to algae-derived green diesel (renewable diesel II), a promising alternative fuel product. Renewable diesel's advocates suggest that it has superior energy density, shelf stability and can function as a drop-in replacement for petroleum diesel due to their similar chemical composition and fuel properties. Fewer studies have attempted to quantify the sustainability of algae-derived renewable diesel, though renewable diesel options are examined in the current GREET model. This study conducts a well-to-pump LCA focusing on this Renewable Diesel II (RD2) upgrade pathway and comparing it with the corresponding pathway from algal biomass to biodiesel. Particular attention is paid to primary energy use and fossil energy ratio (FER), greenhouse gas emissions, and an initial investigation of thermodynamic metrics. While hydrotreating is less than half as energy intensive a fuel upgrade process as transesterification, the overall life-cycle energy consumption and greenhouse gas emissions are found to be nearly equal for renewable diesel and biodiesel. The complete biofuel production process is only found to be net energy positive for scenarios with reduced burdens from both CO2 sourcing and biomass drying.
Starting Page	1
Ending Page	6
File Size	621910
Page Count	6
File Format	PDF
ISBN	9781467320030
ISSN	21575258
e-ISBN	9781467320047
DOI	10.1109/ISSST.2012.6227997
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-05-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Biofuels Production Biomass Global warming Resistance heating Heat pumps renewable diesel algae biodiesel biofuels green diesel life cycle assessment (LCA)
Content Type	Text
Resource Type	Article

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