Carbon-Negative Fuels from Biomass – CCS Concepts for Biorefineries
7 Pages Posted: 9 Apr 2021
Date Written: April 7, 2021
We investigate the near-term techno-economic feasibility of providing carbon-negative fuels by capturing and sequestering by-product CO2 from biofuel production in geological formations. Four different biorefinery technologies (corn ethanol, cellulosic ethanol, thermal fast pyrolysis and thermal gasification) are examined and compared based on performance and costs. Based on our results, the cost of adding CCS on the high-concentration streams of biorefineries varies between 22 and 24 $/tCO2. A clear jump in cost can be seen for plants that feature flue gas capture, being 66 $/tCO2 for pyrolysis.
Keywords: Carbon capture and sequestration (CCS), biorefineries, biofuel production
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