TY - BOOK
T1 - Flashpyrolysis of peat, wood, bark and lignin. Part 2. Pyrolysis tests with Finnish peat at the University of Waterloo
AU - Piskorz, Jan
AU - Scott, Donald
AU - Westerberg, Ian
AU - Arpiainen, Vesa
PY - 1987
Y1 - 1987
N2 - Flash pyrolysis is the rapid thermal decomposition of an
organic material in an oxygen-free atmosphere. Research
on Marsh pyrolysis is a rather new acid, whilst research
on conventional pyrolysis, employing slow heating, has
long traditions. By using flash pyrolysis, it is possible
to convert a large part of the feed material into organic
liquids. This liquid material can be used directly as a
fuel oil. After further treatment it could possibly be
used as a source of motor fuels or chemicals.
The publication deals with flash pyrolysis tests carried
out with Finnish Peat in fluidized bed reactors. The
experimental work was performed at the University of
Waterloo, Canada. A bench-scale unit (10 - 100 g/h) was
the main tool in this test programme. In one experiment a
larger (pilot) unit (1 - 3 kg/h) was employed. Earlier
pyrolysis tests with wood, bagasse, peat, straw and coal
provided interesting reference data. The main objective
of the work was to investigate the effects of temperature
(range 450 - 750 °C), reactive atmosphere (nitrogen,
methane), and gas-phase residence time (0.30 - 1.00 s) on
the organic liquid yields. The pilot run was done at near
optimal conditions to produce a larger quantity of
organic liquid.
The highest yield of recovered organic liquids, about 50
wt-% of moisture and ash-free raw material, was found at
about 450 - 475 °C using the shortest residence time,
0.30 s. At temperatures over 500 °C, the organic liquid
yield decreased quickly in favour of gaseous component
such as carbon monoxide and hydrocarbons. The maximum
yield of light olefins was found to be about 10 wt-% at
the highest temperature employed (750 °C). Methane was an
inert reaction gas in the conditions of these tests. The
toal recovery of pyrolysis produces was excellent,
typically 98 - 100 %. The pyrolysis tests were carried
out under virtually steady-state reaction conditions.
Agreement between the bench-scale result and the pilot
test results was very good.
AB - Flash pyrolysis is the rapid thermal decomposition of an
organic material in an oxygen-free atmosphere. Research
on Marsh pyrolysis is a rather new acid, whilst research
on conventional pyrolysis, employing slow heating, has
long traditions. By using flash pyrolysis, it is possible
to convert a large part of the feed material into organic
liquids. This liquid material can be used directly as a
fuel oil. After further treatment it could possibly be
used as a source of motor fuels or chemicals.
The publication deals with flash pyrolysis tests carried
out with Finnish Peat in fluidized bed reactors. The
experimental work was performed at the University of
Waterloo, Canada. A bench-scale unit (10 - 100 g/h) was
the main tool in this test programme. In one experiment a
larger (pilot) unit (1 - 3 kg/h) was employed. Earlier
pyrolysis tests with wood, bagasse, peat, straw and coal
provided interesting reference data. The main objective
of the work was to investigate the effects of temperature
(range 450 - 750 °C), reactive atmosphere (nitrogen,
methane), and gas-phase residence time (0.30 - 1.00 s) on
the organic liquid yields. The pilot run was done at near
optimal conditions to produce a larger quantity of
organic liquid.
The highest yield of recovered organic liquids, about 50
wt-% of moisture and ash-free raw material, was found at
about 450 - 475 °C using the shortest residence time,
0.30 s. At temperatures over 500 °C, the organic liquid
yield decreased quickly in favour of gaseous component
such as carbon monoxide and hydrocarbons. The maximum
yield of light olefins was found to be about 10 wt-% at
the highest temperature employed (750 °C). Methane was an
inert reaction gas in the conditions of these tests. The
toal recovery of pyrolysis produces was excellent,
typically 98 - 100 %. The pyrolysis tests were carried
out under virtually steady-state reaction conditions.
Agreement between the bench-scale result and the pilot
test results was very good.
KW - peat
KW - pyrolysis
KW - liquefaction
KW - fluidized beds
KW - fluidized bed processing
KW - pilot plants
M3 - Report
SN - 951-38-2996-0
T3 - Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
BT - Flashpyrolysis of peat, wood, bark and lignin. Part 2. Pyrolysis tests with Finnish peat at the University of Waterloo
PB - VTT Technical Research Centre of Finland
CY - Espoo
ER -