Title:
Mass and Energy Balance of a Continuous Biomass Carbonization System Associated with a Rankine Power Cycle
Author(s):
Moya, L.A., Bizzo, W.A.
Document(s):
Paper
Abstract:
This work consisted of the mass and energy balance of a continuous biomass carbonization system, associated with a Rankine-type power generation cycle. A model with a tunnel-type carbonization oven was proposed, divided into three zones: biomass drying, pyrolysis and char cooling. A combustor for pyrolysis gas was attached to the furnace, in order to harness the energy contained in that mixture. The energy generated in the combustion should be delivered to the drying and pyrolysis stages, and the excess would be used to generate power by means of the Rankine cycle. For the simulations, a computer program was developed, the biomass considered was eucalyptus and, for the charcoal produced, gravimetric yields of 30%, 35% and 40% were adopted. Characterizations of the raw material and the char were obtained from the literature. For the energy balance, the HHV of the fuel components and the enthalpy variations of the flows were taken into account. The results showed that the energy recovered from the pyrolysis gases was enough to supply the energy demand of the drying and pyrolysis stages, improving the autothermal process. In addition, extra energy was available for power generation in the Rankine cycle, which could be used for electricity generation.
Keywords:
biomass, power generation, pyrolysis, carbonization
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Biomass pretreatment for solid fuels and production of intermediates
Event:
30th European Biomass Conference and Exhibition
Session:
4CO.12.3
Pages:
612 - 615
ISBN:
978-88-89407-22-6
Paper DOI:
10.5071/30thEUBCE2022-4CO.12.3
Price:
FREE
