Supplementary Material
Strategic supply system design—a holistic evaluation of operational
and production cost for a biorefinery supply chain
Strategic biorefinery feedstock supply system design
Patrick Lamers1,*, Eric C.D. Tan2, Erin M. Searcy1, Christopher J. Scarlata2, Kara G. Cafferty3,
Jacob J. Jacobson4
1
Idaho National Laboratory, Idaho Falls, ID 83415, USA
National Renewable Energy Laboratory, Golden, CO 80401, USA
3
CH2M, Corvallis, OR 97331, USA
4
Mind’s Eye Computing, Idaho Falls, ID 83415, USA
* Corresponding author: patrick.lamers@inl.gov; pa.lamers@gmail.com
2
Figure S 1. Grinding costs are a function of grinding energy needed for corn stover of various moisture contents. Current
biochemical conversion pathway design case assumption is 20% moisture content.
Strategic supply system design—a holistic evaluation of operational and production cost for a
biorefinery supply chain
Figure S 2. The impact of dry matter loss on bale ash content and final conversion efficiency based on a 35% initial
moisture and 10% ash .11 The relative % of ash increases as the bale loses moisture. The storage consists of six bale high
stacks covered with tarp at field side or a similar ‘unimproved’ storage site.
Table S 1. Conversion factors and assumptions.
Gasoline heating value
Gasoline heating value
Biochemical
Thermochemical
2011$ per 2007$
Metric tonnes per short ton
46.54 MJ/kg
124,340 btu/gal
1.521 LGE/MFSP
1.517 LGE/MFSP
1.115
0.907
Strategic supply system design—a holistic evaluation of operational and production cost for a biorefinery supply chain
Table S 2. Biochemical conversion details.
Case 1 Corn Stover (Conventional)
BC Refinery Scale (Dry Tonnes/Day)
Feedstock type
Feedstock logistics
Feedstock form
Minimum fuel selling price, MFSP ($/liter)
Liter Gasoline-Equivalent MFSP, ($/LGE)
Total installed cost ($MM)
Total project investment ($MM)
Delivered feedstock cost ($/dry tonne)
Ethanol production (MM liter/yr)
Ethanol yield (liter/dry tonne)
BC Refinery Scale (Dry Tonnes/Day)
Feedstock type
Feedstock logistics
Feedstock form
Minimum fuel selling price, MFSP ($/liter)
Liter Gasoline-Equivalent MFSP, ($/LGE)
Total installed cost ($MM)
Total project investment ($MM)
Delivered feedstock cost ($/dry tonne)
Ethanol production (MM liter/yr)
Ethanol yield (liter/dry tonne)
500
Corn Stover
Conventional
Bale
$1.01
$1.54
$106
$194
$98.31
57.7
329.2
1000
Corn Stover
Conventional
Bale
$0.84
$1.27
$162
$295
$98.31
115.4
329.3
2000
Corn Stover
Conventional
Bale
$0.72
$1.10
$252
$459
$98.31
230.8
329.3
500
Corn Stover
Advanced
Pellet
$0.92
$1.40
$108.80
$199.10
$98.31
66.4
378.9
Case 2 Corn Stover (Advanced)
1000
2000
Corn Stover
Corn Stover
Advanced
Advanced
Pellet
Pellet
$0.76
$0.66
$1.16
$1.01
$164.87
$257.51
$301.32
$470.32
$98.31
$98.31
132.8
265.6
379.0
379.0
5000
Corn Stover
Advanced
Pellet
$0.58
$0.88
$472.22
$864.73
$98.31
664.0
379.0
7500
Corn Stover
Advanced
Pellet
$0.55
$0.84
$625.94
$1,148.32
$98.31
995.9
378.9
10000
Corn Stover
Advanced
Pellet
$0.54
$0.82
$763.95
$1,402.94
$98.31
1327.8
378.9
Strategic supply system design—a holistic evaluation of operational and production cost for a biorefinery supply chain
Biorefinery Size (2000 Dry Tonnes/day)
Feedstock Ash Content (Dry wt%)
Feedstock type
Feedstock logistics
Feedstock form
Minimum fuel selling price, MFSP ($/liter)
Liter Gasoline-Equivalent MFSP, ($/LGE)
Total installed cost ($MM)
Total project investment ($MM)
Delivered feedstock cost ($/dry tonne)
Ethanol production (MM liter/yr)
Ethanol yield (liter/dry tonne)
Case 3 Corn Stover (Conventional) - various ash contents
5%
7%
9%
11%
Corn Stover
Corn Stover
Corn Stover
Corn Stover
Advanced
Advanced
Advanced
Advanced
Pellet
Pellet
Pellet
Pellet
$0.67
$0.69
$0.71
$0.72
$1.02
$1.05
$1.07
$1.10
$258.18
$256.51
$254.84
$251.60
$470.21
$467.76
$465.19
$459.06
$98.31
$98.31
$98.31
$98.31
246.5
241.2
236.1
230.8
351.7
344.2
336.8
329.3
13%
Corn Stover
Advanced
Pellet
$0.74
$1.12
$250.04
$456.50
$98.31
225.6
321.8
15%
Corn Stover
Advanced
Pellet
$0.76
$1.15
$248.82
$454.16
$98.31
220.3
314.4