Pinus pinea emissions and combustion characteristics of limonene potentially involved in accelerating forest fires

Courty, Léo; Chetehouna, Khaled; Lemée, Laurent; Mounaïm‐Rousselle, Christine; Halter, Fabien; Garo, Jean-Pierre

doi:10.1016/j.ijthermalsci.2012.02.012

Cited by 17 publications

(16 citation statements)

References 34 publications

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“…Figures 6 and 7 illustrate, respectively, the laminar burning speeds and the Markstein lengths of l-fenchone/air mixtures and 3-hexen-1-ol/air mixtures as functions of equivalence ratio at 453 K. Let us notice that these combustion characteristics are extracted from the spherical flame front images using a nonlinear methodology. The efficiency of this approach has already been discussed (Halter et al, 2010) and has been applied on two other BVOCs, namely, α-pinene and limonene (Courty et al, 2012b(Courty et al, , 2012c. As reported in Halter et al (2010), the use of the linear methodology induces consequent errors for highly stretched flames.…”

Section: Resultsmentioning

confidence: 94%

Combustion Characteristics of Two Biogenic Volatile Organic Compounds: L-Fenchone and 3-Hexen-1-OL

Coudour

Chetehouna

Courty

et al. 2014

Combustion Science and Technology

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This article deals with the emissions and combustion of l-fenchone and 3-hexen-1-ol. These biogenic volatile organic compounds (BVOCs) are the main compounds emitted respectively by two vegetal species often involved in forest fires: Lavandula stoechas and Cistus albidus. Two types of experimental setups are used: a flash-pyrolysis device to study the emissions at elevated temperatures and a spherical chamber to study the combustion characteristics. Emission results are compared to literature data for the same vegetal species at ambient temperature. Laminar burning speeds and Markstein lengths of these two BVOCs are determined at 453 K for different equivalence ratios. Results are compared to the ones obtained in our previous works for two other BVOCs at the same temperature.

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Section: Resultsmentioning

confidence: 94%

Combustion Characteristics of Two Biogenic Volatile Organic Compounds: L-Fenchone and 3-Hexen-1-OL

Coudour

Chetehouna

Courty

et al. 2014

Combustion Science and Technology

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“…Forest fuel flammability depends upon several plant traits: (i) the physical properties (morphology, surface/volume ratio, crown architecture); (ii) the primary chemical traits (water content, percentage in lignin, mineral/ash content); (iii) the presence/abundance of secondary flammable metabolites (Dimitrakopoulos & Papaioannou 2001, Weise et al 2005, Monti et al 2008, Alessio et al 2008a, 2008b, Cruz & Alexander 2010, Pickett et al 2010, Courty et al 2012, Pausas et al 2016; (iv) the vegetation structure (e.g., fuel loading, arrangement, packing ratio, porosity, dead:live ratio - Fernandes & Cruz 2012). Many of these characteristics can also depends on the recurrence of fire and consequently to phenotypic adaptation of individual plant traits influencing flammability under different fire regimes (Pausas & Moreira 2012, Moreira et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…In addition to fuel moisture (Alessio et al 2008b, Pickett et al 2010), plant's volatile terpenoids have been considered as another possible important factor affecting flammability (Alessio et al 2008b, Chetehouna et al 2009, Ormeño et al 2009, Courty et al 2012, Ciccioli et al 2014, Pausas et al 2016. Most plant species of the Mediterranean vegetation are known to synthesize volatile terpenoids (hemiterpenoids, monoterpenoids and sesquiterpenoids) as secondary metabolites involved in the interaction of plants with their environment (Ormeño et al 2007, Ciccioli et al 2014, Karban et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Relevance of terpenoids on flammability of Mediterranean species: an experimental approach at a low radiant heat flux

Rocca¹,

Madrigal²,

Marchi³

et al. 2017

iForest

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One of the major factors influencing forest fuel combustion are terpenoids, a fraction of flammable Biogenic Volatile Organic Compounds (BVOCs) produced and stored by most Mediterranean species. The qualitative and quantitative effect of terpenoids on flammability has been only partially explained. In this study several major terpenoid-storing Mediterranean species (common cypress and three pines) were considered and compared to Holm oak as a reference non-storing species. The terpenoids were quantified via gas chromatography (GC-MS) analysis from both live fine fuel (LFF) and litter samples, and the relations between flammability and the terpenoids content were investigated by categories (Monoterpenoids, oxygenated Monoterpenoids, Sesquiterpenoids). The effect of fuel moisture content and species on ignition probability of LFF was also explored. A very different ignition probability was observed at the same fuel moisture content for the different species (Pinus spp. > C. sempervirens > Q. ilex). The stored terpenoids explained 19% to 50% of the whole flammability of both LFF and litter. Fuel moisture content (FMC) did not substantially change the relative effect of terpenoids on flammability, except in C. sempervirens. Monoterpenoids do not seem to significantly affect flammability, while sesquiterpenoids greatly influenced most flammability components, though their relative effect varied among species. A relation between storing structure of terpenoids and flammability was suggested. The results of this study indicate that isoprenoids should be included in physical models of the prediction and propagation of wildfire in Mediterranean vegetation as significant factors in driving flammability.

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“…We can note the studies of Chetehouna et al 3 and Barboni et al 14 for, respectively, the emissions of Rosmarinus officinalis in an hermetic enclosure and the emissions of Pinus laricio, Pinus pinaster, and Cistus monspeliensis using an Automatic Thermal Desorber (ATD). In previous works, the present authors 4,15 have characterized the emissions of R. officinalis and P. pinea needles in a flash pyrolysis apparatus and identified, respectively, a-pinene and limonene as the main components between 70°C and 180°C, and the maximum emission temperature has been found around 167°C.…”

Section: Introductionmentioning

confidence: 88%

“…The origin of such phenomena can be the accumulation of BVOCs in concentrations closed to the LFL of the gases mixtures (BVOCs/air) in seasons when the plants are themselves very flammable. [3][4][5] BVOCs also have effects on human health and many of them are even carcinogen. Indeed, many studies have correlated the presence of BVOCs to the occurrence of respiratory diseases in a given population.…”

Section: Introductionmentioning

confidence: 99%

Biogenic volatile organic compounds emissions at high temperatures of common plants from Mediterranean regions affected by forest fires

Courty

Chetehouna

Lemée

et al. 2014

Journal of Fire Sciences

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Vegetal species emit biogenic volatile organic compounds at elevated temperatures. Because of their combustibility, biogenic volatile organic compounds can modify the wildland fires propagation dynamics, changing them from a moderate behavior to an explosive propagation. This phenomenon is known as an accelerating forest fire. The origin of such phenomena can be the accumulation of biogenic volatile organic compounds in concentrations close to their lower flammability limit in seasons where the plants are themselves very flammable. There is a lack of information on the biogenic volatile organic compounds emissions of vegetal species typically found in wildland fires at temperatures higher than ambient temperature. In this work, we used a flash pyrolysis device linked to a gas chromatograph/mass spectrometer to investigate experimentally the biogenic volatile organic compounds emissions of Thymus vulgaris, Lavandula stoechas, and Cistus albidus between 70°C and 180°C. High amounts of terpenoid compounds were found, except for C. albidus emissions, including thymol, l-fenchone, and 3-hexen-1-ol. The information provided in this work could help to improve the characterization of thermal degradation of vegetal fuels and to incorporate the biogenic volatile organic compounds combustion in physical forest fires models. They also show that under the right circumstances, biogenic volatile organic 1

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Pinus pinea emissions and combustion characteristics of limonene potentially involved in accelerating forest fires

Cited by 17 publications

References 34 publications

Combustion Characteristics of Two Biogenic Volatile Organic Compounds: L-Fenchone and 3-Hexen-1-OL

Combustion Characteristics of Two Biogenic Volatile Organic Compounds: L-Fenchone and 3-Hexen-1-OL

Relevance of terpenoids on flammability of Mediterranean species: an experimental approach at a low radiant heat flux

Biogenic volatile organic compounds emissions at high temperatures of common plants from Mediterranean regions affected by forest fires

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