Fast pyrolysis of cassava rhizome was performed in a bench-scale fluidised-bed reactor unit incorporated
with a cross-flow moving-bed granular filter. The objective of this research was to examine several process
parameters including the granular size (425–1160 lm) and mass flow rate (0–12 g/min) as well as
the number of the filtration stages (1–2 stages) on yields and properties of bio-oil. The results showed
that the bio-oil yield decreased from 57.7 wt.% to 42.0–49.2 wt.% when increasing the filter media size,
the mass flow rate and the filtration stage number. The effect of the process parameters on various properties
of bio-oil is thoroughly discussed. In general, the bio-oil quality in terms of the solids content, ash
content, initial viscosity, viscosity change and ageing rate could be enhanced by the hot vapour granular
filtration. Therefore, bio-oil of high stability could be produced by the pyrolysis reactor configuration
designed in this work.
partial combustion of wood. A small fire at the bottom provided the required
heat for carbonization. The fire essentially stayed in the well-insulated closed
chamber. Carbonization allows adequate time for the condensable vapor to be
converted into char and noncondensable gases.