Abstract
Lignin, sewage sludge and macroalg
ae (nonconventional biomasses) fast pyrolysis properties has been
studied through experimental investigations on a la
boratory Pyrolysis Centrifugal Reactor (PCR) and a
model on lignin pyrolysis have been developed. Fu
rthermore the nonconventional biomass pyrolysis
properties were compared with the pyrolysis properti
es of wood and straw. The PCR treatment of sewage
sludge provides an oil that can be used for energy pur
poses and a solid residue rich in in organic nutrients
that may be used as fertilizer product. By fast pyroly
sis of lignin from the IBUS ethanol plant a bio-oil can
be produced with oil yields of 36% (daf) and an oil en
ergy recovery of 45%. This is a relatively low bio-oil
yield compared to other feedstock’s, however, it may
increase the value of the lignin residual product, such
that the lignin char is used for combustion on the ethanol
plant, and the bio-oil is sold for use on heavy oil
burners. The macroalgae is a promising feedstock w
ith a high bio-oil yield of 54 wt% daf and an energy
recovery of 76 % in the liquid oil. Detailed characteriza
tion of the pyrolysis products in the form of bio-oil,
gas and char has been performed. The properties of sl
urries made of char and pyrolysis oil that potentially
may be used as a feed for pressurized gasifiers has been
investigated. It was shown that slurries made of
mixtures of wood and bio-oil can be pumped into pressu
rized systems. A new patented version of the PCR
rotor unit, which can be operated at low rotational
speed was constructed. The new rotor systems should
make it easier to make an up-scaling of the process.
Original language | English |
---|
Publisher | Technical University of Denmark, Department of Chemical and Biochemical Engineering |
---|---|
Number of pages | 146 |
Publication status | Published - 2014 |
Bibliographical note
CHEC no. R1401Energinet.dk project no. 010077