Process integration and optimization of a solid oxide fuel cell - Gas turbine hybrid cycle fueled with hydrothermally gasified waste biomass

作者：Facchinetti Emanuele^*; Gassner Martin; D'Amelio Matilde; Marechal Francois; Favrat Daniel

来源：Energy, 2012, 41(1): 408-419.

DOI：10.1016/j.energy.2012.02.059

• Hydrothermal biomass gasification
• Hybrid cycle
• SOFC
• Process design
• Process integration
• Optimization

Due to its suitability for using wet biomass, hydrothermal gasification is a promising process for the valorization of otherwise unused waste biomass to synthesis gas and biofuels. Solid oxide fuel cell (SOFC) based hybrid cycles are considered as the best candidate for a more efficient and clean conversion of (bio) fuels. A significant potential for the integration of the two technologies is expected since hydrothermal gasification requires heat at 673-773 K, whereas SOFC is characterized by heat excess at high temperature due to the limited electrochemical fuel conversion.
This work presents a systematic process integration and optimization of a SOFC-gas turbine (GT) hybrid cycle fueled with hydrothermally gasified waste biomass. Several design options are systematically developed and compared through a thermodynamic optimization approach based on First Law and exergy analysis.
The work demonstrates the considerable potential of the system that allows for converting wet waste biomass into electricity at a First Law efficiency of up to 63%, while simultaneously enabling the separation of biogenic carbon dioxide for further use or sequestration.

• 出版日期2012-5