The pyrolysis test of partial typical biomass materials has been carried out in a small-scale fixed bed pyrolysis furnace

and the production rate of tar as well as the distribution behavior of aromatic components in products of pyrolysis being studied. Results show that the higher volatile matter and water content in the material

the productivity of tar (containing water) from biomass pyrolysis is correspondingly enhanced. Along with the rising of pyrolysis temperature

the productivity of tar changes in a staged way

at first ascending and then descending. A change in the final pyrolysis temperature will lead to a change of component distribution in tar

and especially at 650 ℃

a tremendous change happens. Among four kinds of aromatic hydrocarbon produced in the process of biomass pyrolysis test

benzene and naphthalene are the main components

and biphenil and pyrene are the minor ones. along with rising of the pyrolysis temperature

the content of benzene is gradually descending

while the content of naphthalene is increasing.