With the circulating fluidized bed (CFB) as reactor, an integrated facility was developed for
the fast pyrolysis of biomass. The main chemical processes in CFB can be modeled, and the bed
is divided into two zones corresponding to the pyrolysis and secondary reactions. The pyrolysis
of wood powder was processed varying the bed temperature, particle size of wood powder, and
the feeder position. Based on the variation of the pyrolysis gas composition and the bio-oil
ingredients, analysis of the experimental data highlights the important effects of temperature,
heating rate, and residence time. The main trend is that (1) the higher temperature and longer
residence time contribute to the secondary reactions, which lead to less liquids; (2) the lower
heating rate favors the carbonization, also reduces the liquid production. The analysis of bio-oil
components shows that most compounds in bio-oil are non-hydrocarbons and alkanesaromatics
and asphalt are relatively low.