Multi-scale experimental investigations of the thermal degradation of pine needles

Talal Fateh, F. Richard, J. Zaida, T. Rogaume, P Joseph

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    In this work, the thermal degradation of pine needles (from a Mediterranean species) was studied using a thermogravimetric analysis and cone calorimeter that were coupled to Fourier transform infrared spectrometer. The thermogravimetric analyses were carried out at four heating rates, in both air and nitrogen atmospheres. The evolution of gaseous components, mass loss and mass loss rate were recorded as a function of time and temperature. In order to account for the observed behaviours of the materials, we have also proposed a mechanism for the thermal degradation of pine needles, by primarily analysing the evolutions of both mass loss rate and gaseous components under nitrogen and air atmospheres. The kinetic parameters were subsequently estimated by using a genetic algorithm method. The cone calorimetric measurements were mainly conducted with a view to investigating the influence of thermal transfer processes, occurring in a porous bed of pine needles with regard to its thermal degradation. The experiments were conducted at five external heat fluxes under a well-ventilated atmosphere. Measurements consisted of the mass loss, mass loss rate and the amount of gaseous emissions. The main gases emitted during the thermal degradation and the combustion of the pine needles were found to be CH4, CO, CO2, NO and water vapour. In addition, the evolution of the temperature was measured by using a set of five thermocouples, placed in a vertical position at the centreline of the sample. The results obtained showed that the bed of pine needles behaved as a thermally thick fuel. On the contrary, at higher external heat fluxes, the sample behaved as a thermally thin sample.
    LanguageEnglish
    Pages654-674
    Number of pages21
    JournalFire and Materials
    Volume41
    Early online date12 Oct 2016
    DOIs
    Publication statusE-pub ahead of print - 12 Oct 2016

    Fingerprint

    Needles
    Pyrolysis
    Heat flux
    Cones
    Nitrogen
    Infrared spectrometers
    Steam
    Carbon Monoxide
    Thermocouples
    Air
    Calorimeters
    Heating rate
    Gas emissions
    Kinetic parameters
    Water vapor
    Thermogravimetric analysis
    Fourier transforms
    Genetic algorithms
    Gases
    Temperature

    Keywords

    • Cone calorimeter
    • Forest fire
    • Gaseous emissions
    • Kinetic model
    • Pyrolysis
    • Thermal decomposition
    • Thermogravimetric analysis
    • Vegetation

    Cite this

    Fateh, Talal ; Richard, F. ; Zaida, J. ; Rogaume, T. ; Joseph, P. / Multi-scale experimental investigations of the thermal degradation of pine needles. In: Fire and Materials. 2016 ; Vol. 41. pp. 654-674.
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    Fateh, T, Richard, F, Zaida, J, Rogaume, T & Joseph, P 2016, 'Multi-scale experimental investigations of the thermal degradation of pine needles', Fire and Materials, vol. 41, pp. 654-674. https://doi.org/10.1002/fam.2407

    Multi-scale experimental investigations of the thermal degradation of pine needles. / Fateh, Talal; Richard, F.; Zaida, J.; Rogaume, T.; Joseph, P.

    In: Fire and Materials, Vol. 41, 12.10.2016, p. 654-674.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Multi-scale experimental investigations of the thermal degradation of pine needles

    AU - Fateh, Talal

    AU - Richard, F.

    AU - Zaida, J.

    AU - Rogaume, T.

    AU - Joseph, P

    PY - 2016/10/12

    Y1 - 2016/10/12

    N2 - In this work, the thermal degradation of pine needles (from a Mediterranean species) was studied using a thermogravimetric analysis and cone calorimeter that were coupled to Fourier transform infrared spectrometer. The thermogravimetric analyses were carried out at four heating rates, in both air and nitrogen atmospheres. The evolution of gaseous components, mass loss and mass loss rate were recorded as a function of time and temperature. In order to account for the observed behaviours of the materials, we have also proposed a mechanism for the thermal degradation of pine needles, by primarily analysing the evolutions of both mass loss rate and gaseous components under nitrogen and air atmospheres. The kinetic parameters were subsequently estimated by using a genetic algorithm method. The cone calorimetric measurements were mainly conducted with a view to investigating the influence of thermal transfer processes, occurring in a porous bed of pine needles with regard to its thermal degradation. The experiments were conducted at five external heat fluxes under a well-ventilated atmosphere. Measurements consisted of the mass loss, mass loss rate and the amount of gaseous emissions. The main gases emitted during the thermal degradation and the combustion of the pine needles were found to be CH4, CO, CO2, NO and water vapour. In addition, the evolution of the temperature was measured by using a set of five thermocouples, placed in a vertical position at the centreline of the sample. The results obtained showed that the bed of pine needles behaved as a thermally thick fuel. On the contrary, at higher external heat fluxes, the sample behaved as a thermally thin sample.

    AB - In this work, the thermal degradation of pine needles (from a Mediterranean species) was studied using a thermogravimetric analysis and cone calorimeter that were coupled to Fourier transform infrared spectrometer. The thermogravimetric analyses were carried out at four heating rates, in both air and nitrogen atmospheres. The evolution of gaseous components, mass loss and mass loss rate were recorded as a function of time and temperature. In order to account for the observed behaviours of the materials, we have also proposed a mechanism for the thermal degradation of pine needles, by primarily analysing the evolutions of both mass loss rate and gaseous components under nitrogen and air atmospheres. The kinetic parameters were subsequently estimated by using a genetic algorithm method. The cone calorimetric measurements were mainly conducted with a view to investigating the influence of thermal transfer processes, occurring in a porous bed of pine needles with regard to its thermal degradation. The experiments were conducted at five external heat fluxes under a well-ventilated atmosphere. Measurements consisted of the mass loss, mass loss rate and the amount of gaseous emissions. The main gases emitted during the thermal degradation and the combustion of the pine needles were found to be CH4, CO, CO2, NO and water vapour. In addition, the evolution of the temperature was measured by using a set of five thermocouples, placed in a vertical position at the centreline of the sample. The results obtained showed that the bed of pine needles behaved as a thermally thick fuel. On the contrary, at higher external heat fluxes, the sample behaved as a thermally thin sample.

    KW - Cone calorimeter

    KW - Forest fire

    KW - Gaseous emissions

    KW - Kinetic model

    KW - Pyrolysis

    KW - Thermal decomposition

    KW - Thermogravimetric analysis

    KW - Vegetation

    U2 - 10.1002/fam.2407

    DO - 10.1002/fam.2407

    M3 - Article

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    SP - 654

    EP - 674

    JO - Fire and Materials

    T2 - Fire and Materials

    JF - Fire and Materials

    SN - 0308-0501

    ER -