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Assessing the suitability of recovering shrub biowaste involved in wildland fires in the South of Europe through torrefaction mobile units

González Martínez, María and Dupont, Capucine and da Silva Perez, Denilson and Míguez-Rodríguez, Luis and Grateau, Maguelone and Thiéry, Sébastien and Tamminen, Tarja and Meyer, Xuân-Mi and Gourdon, Christophe Assessing the suitability of recovering shrub biowaste involved in wildland fires in the South of Europe through torrefaction mobile units. (2019) Journal of Environmental Management, 236. 551-560. ISSN 0301-4797

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Official URL: https://doi.org/10.1016/j.jenvman.2019.02.019

Abstract

Several types of shrubs and oak inducing high wildland fire risk in the South of Europe were evaluated for their potential valorization through torrefaction. Biomasses were firstly characterized in terms of macromolecular and elemental composition. Lab-scale TGA-GC/MS torrefaction experiments allowed the in-depth study of the solid mass transformation and the production profile of 23 volatile species (200 to 300 °C at 3 °C·min-1 and 300 °C for 30 min). The proportion of the torrefied products (solid, CO, CO2, water and volatile species) was evaluated through mass balance in a lab-scale furnace under typical torrefaction conditions (300 °C, 40 min). The results show a similar characterization and behavior in torrefaction for oak and shrublands, and slightly different characteristics for fern. However, fern may grow separately from shrublands and is considered to present a low fire risk. This suggests that the in-situ direct valorization of these biomasses through torrefaction mobile units seems promising. However, other properties, such as density, flowability and grindability need to be studied to confirm the feasibility of the process. Regarding torrefaction products, a higher carbon content and an interesting increase in heating value were measured for the torrefied solid, which makes it suitable for energetic valorization, among other uses. The composition of permanent gases was evaluated and found in agreement with previous studies. Finally, the volatile species released were studied in function of the torrefaction temperature, in view of their possible valorization as green chemicals.

Item Type:Article
HAL Id:hal-02283660
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Institut Technologique Forêt Cellulose Bois-construction Ameublement - FCBA (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Universidades de Galicia (SPAIN)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > IHE Delft Institute for Water Education (NETHERLANDS)
Other partners > VTT Technical Research Centre of Finland Ltd (FINLAND)
Laboratory name:
Funders:
European Union Horizon 2020
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Deposited On:10 Sep 2019 11:55

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