Type of Cost Assumption Value cited Value in 2007 Reference
Investment cost 69.3 MMGY $197.4 million Aden et al. (2002)
(Cellulosic
biorefineries)
55.5 MMGY $231.7 million $231.7 million Aden (2008)
50 MMGY $294 million Wright and Brown (2007)
100 MMGY $400 million Taheripour and Tyner (2008)
Stover (69.6) $202.2 million Huang et al. (2009)
Switchgrass (64) (0.46/gal if 10-10) $212.1 million $0.501
Hybrid poplar (68) (0.53/gal if 10-10) $203.3 million $0.58
Aspen wood (86) (0.50/gal if 10-10) $187 million $0.545
(0.34/gal if 10-10) $0.37
$0.55/gallon $0.55/gal Jiang and Swinton (2008)
Other costs Partial variable costs $0.11/gal Aden et al. (2002)
“Other” costs $0.11/gal Aden et al. (2002)
Total non-feedstock costs $1.48/gal Chen et al. (2010)
Enzyme cost $0.07-0.20/gal Aden et al. (2002)
$0.32/gal $0.32/gal Aden (2008)
2012 target $0.10/gal Aden (2008)
$0.14-0.18/gal Bothast (2005)
$0.18/gal Jha et al. (Presentation)
$0.40-$1.00/gal $0.40-$1.00/gal Industry Source
$0.10-0.25/gal Tiffany et al. (2006)
Operating costs Stover $1.42/gal2 $1.58/gal Huang et al. (2009)
Switchgrass (crop) $1.73/gal $1.92/gal
Switchgrass (grass) $1.86/gal $2.06/gal
Hybrid poplar $1.83/gal $2.03/gal
Aspen wood $1.56/gal $1.73/gal
$1.10/gal $1.10/gal Jiang and Swinton (2008)
Ethanol yield (Gal/dry ton) Stover 87.9 Aden et al. (2002)
Stover (current) 71.9 Aden (2008)
Stover (theoretical) 112.7 Aden (2008)
Stover (2012 target) 90 Aden (2008)
Stover Switchgrass Miscanthus (Nth generation plant) 79.2 Khanna and Dhungana (2007)


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