Paper details

Title:

Energy Penalty of CO₂ Capture from Biomass Combustion and Fermentation in Brazilian Sugarcane and Corn Ethanol Biorefineries

Author(s):

Galindo, R.F., Seabra, J.E.A.

Document(s):

Abstract:

In order to curb global warming and the impacts of climate change, the Paris Agreement settled GHG emissions mitigation targets to the contributing parts. Since that, climate stakeholders have been investigating technologies to meet those targets. One of the most prominent alternatives relies on carbon capture in biorefineries, or BECCS (Bioenergy with Carbon Capture and Storage), which has the potential to reach negative CO2 emissions. Brazil is one of the main countries with potential to deploy BECCS due to its large ethanol industry. This study investigates the energy penalty of BECCS deployment in 1st and 2nd generation Brazilian sugarcane and corn biorefineries. Five different biorefineries configurations were chosen and assessed in terms of the energy demand from capture systems in cogeneration and fermentation. Process simulations in Aspen Plus® were used for the technical assessment. The CO2 from cogeneration was captured via post-combustion by absorption with 30% monoethanolamine (MEA), and the CO2 from fermentation was captured directly from the gas stream. After capture, the CO2 streams were subsequently compressed up to 150 bar. We found global CO2 capture ratios from 28% to 87%, and global energy penalties from ~9% to 42% in the biorefineries assessed.

Keywords:

bioenergy, biorefinery, CO₂ capture, cogeneration, ethanol

Topic:

Bioenergy Integration

Subtopic:

Strategies for Biomass Integrated into Energy Systems

Event:

29th European Biomass Conference and Exhibition

Session:

5BV.5.16

Pages:

1359 - 1365

ISBN:

978-88-89407-21-9

Paper DOI:

10.5071/29thEUBCE2021-5BV.5.16

Price:

FREE