Flashpyrolysis of peat, wood, bark and lignin. Part 2. Pyrolysis tests with Finnish peat at the University of Waterloo

Jan Piskorz, Donald Scott, Ian Westerberg, Vesa Arpiainen

    Research output: Book/ReportReport

    Abstract

    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.
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages38
    ISBN (Print)951-38-2996-0
    Publication statusPublished - 1987
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
    Number507
    ISSN0358-5077

    Fingerprint

    Peat
    Lignin
    Wood
    Pyrolysis
    Liquids
    Ashes
    Methane
    Bagasse
    Straw
    Fuel oils
    Gases
    Carbon monoxide
    Fluidized beds
    Temperature
    Olefins
    Raw materials
    Moisture
    Hydrocarbons
    Coal
    Nitrogen

    Keywords

    • peat
    • pyrolysis
    • liquefaction
    • fluidized beds
    • fluidized bed processing
    • pilot plants

    Cite this

    Piskorz, J., Scott, D., Westerberg, I., & Arpiainen, V. (1987). Flashpyrolysis of peat, wood, bark and lignin. Part 2. Pyrolysis tests with Finnish peat at the University of Waterloo. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 507
    Piskorz, Jan ; Scott, Donald ; Westerberg, Ian ; Arpiainen, Vesa. / Flashpyrolysis of peat, wood, bark and lignin. Part 2. Pyrolysis tests with Finnish peat at the University of Waterloo. Espoo : VTT Technical Research Centre of Finland, 1987. 38 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 507).
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    abstract = "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.",
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    Piskorz, J, Scott, D, Westerberg, I & Arpiainen, V 1987, Flashpyrolysis of peat, wood, bark and lignin. Part 2. Pyrolysis tests with Finnish peat at the University of Waterloo. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 507, VTT Technical Research Centre of Finland, Espoo.

    Flashpyrolysis of peat, wood, bark and lignin. Part 2. Pyrolysis tests with Finnish peat at the University of Waterloo. / Piskorz, Jan; Scott, Donald; Westerberg, Ian; Arpiainen, Vesa.

    Espoo : VTT Technical Research Centre of Finland, 1987. 38 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 507).

    Research output: Book/ReportReport

    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

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    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Piskorz J, Scott D, Westerberg I, Arpiainen V. Flashpyrolysis of peat, wood, bark and lignin. Part 2. Pyrolysis tests with Finnish peat at the University of Waterloo. Espoo: VTT Technical Research Centre of Finland, 1987. 38 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 507).