Application of Hydroprocessing, Fermentation, and Anaerobic Digestion in a Carbon-Negative Pyrolysis Refinery

• DOI: 10.1021/acssuschemeng.0c03905
• Publication Date: 2020-10-30T09:44:40Z
• Authors: Arna Ganguly; Irene M. Martin; Robert C. Brown; Mark M. Wright
• Keywords: Corn stover; Refinery

This study investigates the economic and environmental benefits of integrating hydroprocessing, fermentation, anaerobic digestion into a pyrolysis refinery. Two scenarios were developed for upgrading and/or utilizing primary products (bio-oil, gas, char). The first (hydroprocessing) scenario hydroprocesses whole bio-oil gasoline diesel. second (fractionation) fractionates sugars fermentation to cellulosic ethanol residual phenolic oil as product. Both use gaseous product process heat in plant employ biochar enhance manure power generation. fast processes 2000 ton/day corn stover while digester employs 430 generate power. hydroprocessing produces at minimum fuel-selling price (MFSP) $2.77 per gallons fractionation oils (diesel) transportation fuel $1.2 gallon ($1.41 GGE). Sensitivity analysis indicates that MFSP both is highly sensitive fixed capital cost. Fixed costs estimated be $643 $288 million, respectively. Fuel production rates are 60.5 16 million GGE year, Life cycle greenhouse gas emissions calculated −9.6 −16.6 g CO2,eq MJ scenarios, LCA byproduct credits derived from sequestration shows systems produce fuels competitive market prices with an additional reduction atmospheric CO2 levels compared fossil sources.