TITLE:
Heat Transfer within Direct Heating Integrated Moving Bed Torrefier by Method of Lines
AUTHORS:
Bosikawa Mosi Fabrice, Sumuna Temo Vertomene, Mbuyi Katshiatshia Haddy
KEYWORDS:
Torrefaction, Biomass, Sugarcane Bagasse, Moving Bed, Method of Lines
JOURNAL NAME:
Journal of Sustainable Bioenergy Systems,
Vol.11 No.1,
February
26,
2021
ABSTRACT: This work deals with the
determination of the temperature profile within a direct heating moving bed torrefier in
order to determine its minimum column height. A thermal model based on eulerian-eulerian two-phase solid-gas theory was performed and solved with the
method of lines. In addition, this study
allows to investigate the effect of the
biomass particle size on the minimum torrefier column height. This investigation was performed by changing, simultaneously, the diameter of particles and
the minimum fluidization velocity of the bed. Then, the calculations were made
for a counter-current torrefaction reactor of 30 cm in diameter and for 5 kg/h of the feed rate of raw
sugarcane bagasse. Results show that the height
of the reactor column must be at least 30 cm for that are 1 mm in diameter and
108 cm for particles that are 2 mm in diameter.