Title:
Catalytic Hydrothermal Gasification of Sugar Beet Vinasse in Subcritical Water Conditions
Author(s):
Mochel, R., Demey, H., Chappaz, A., Vilcocq, L., Fongarland, P.
Document(s):
Paper
Abstract:
This work focus on the hydrothermal conversion of an industrial effluent from bioethanol distillery: sugar beet vinasse. This wet feedstock has an important carbon content which is currently unused. In order to contribute to the circular carbon economy, sugar beet vinasse valorization can afford biofuel production from its organic content. Hydrothermal gasification (HTG) appears as a convenient process to generate H2 and CH4-rich gas from this effluent. HTG is commonly operated in supercritical water conditions to ensure high gas yields. Although subcritical water conditions are rather used for producing biocrude and minor gas yields, the addition of catalyst emerges as an efficient way to increase drastically the gas yield. Thus, catalytic subcritical HTG (350 °C) was performed on sugar beet vinasse, resulting in 34.9% of carbon converted toward the gas phase. H2 and CH4 yields reached 7.52 and 3.52 mol/kg of dry matter, respectively. Catalyst addition also contribute to the reduction of char formation to the benefit of gas production. This first attempt to produce gas from sugar beet vinasse at such low temperature showed a certain feasibility, but some improvement are still required to recover more energetic gas in these conditions.
Keywords:
wastewater treatment, catalyst, hydrothermal gasification, sugar beet vinasse, methane and hydrogen production
Topic:
Biomass Conversion to Intermediate Bioenergy Carriers and Sustainable Biofuels
Subtopic:
Hydrothermal processing
Event:
32nd European Biomass Conference and Exhibition
Session:
5CO.13.3
Pages:
675 - 678
ISBN:
978-88-89407-24-0
Paper DOI:
10.5071/32ndEUBCE2024-5CO.13.3
Price:
FREE
