(570b) Application of Hydroprocessing, Fermentation and Anaerobic Digestion in a Pyrolysis Refinery to Maximize Economic Value
AIChE Annual Meeting
2020
2020 Virtual AIChE Annual Meeting
Sustainable Engineering Forum
Biofuels Production: Design, Simulation, and Economic Analysis
Monday, November 16, 2020 - 8:15am to 8:30am
The fast pyrolysis plant processes 2000 ton/day of corn stover while the anaerobic digester employs 430 ton/day of manure to generate power. The hydroprocessing scenario produces gasoline at a minimum fuel-selling price (MFSP) of $2.77 per gallons of gasoline while the fractionation scenario produces ethanol for $2.25 per gallon ($3.38 per GGE). Sensitivity analysis indicates that the MFSP for both scenarios is highly sensitive to the fixed capital cost. Fixed capital costs for the hydroprocessing and fractionation scenarios were estimated to be $643 million and $285 million, respectively. Fuel production rates for the hydroprocessing and fractionation scenarios are 60.5 and 7.7 million GGE per year, respectively. Life cycle greenhouse gas emissions were calculated as -7.6 and â108.9 gm CO2, eq per MJ for the hydroprocessing and fractionation scenarios, respectively. LCA emissions are sensitive to by-product credits derived from biochar sequestration, phenolic oil utilization, and power generation. This study shows that both systems produce transportation fuels at competitive market prices with an additional reduction in atmospheric CO2 levels in comparison to fossil fuel sources.
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