Flowability of lignocellulosic biomass powders: influence of torrefaction intensity - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue EPJ Web of Conferences Année : 2017

Flowability of lignocellulosic biomass powders: influence of torrefaction intensity

Résumé

The poor flowability of powders produced from raw lignocellulosic biomass may be an economically issue for the production of second-generation biofuels. Torrefaction is a pre-treatment step of the gasification process that improves the physical characteristics of biomass by making it more coal-like. Particularly, the loss of resilience allows a reduction of the grinding energy consumption and is likely to improve the flow behaviour of woody powders. In this study, we investigated the effect of particle size and shape distribution on flow properties (unconfined yield stress and flowability factor) of powder from raw and torrefied biomass (Picea abies). Several intensities of torrefaction were tested, and its extent was quantified by the global mass loss, chosen as synthetic indicator of torrefaction intensity (its accounts for both the temperature level and the residence time). The intensity of torrefaction shifts the particle size distribution towards smaller sizes. An effect on the circularity and aspect ratio was also observed. A strong, positive correlation was obtained between the measured flowability of biomass powders at different consolidation stresses and the intensity of heat treatment. These results confirm the interest of torrefaction as a pre-treatment step and aim to provide new knowledge on rheological properties of biomass powders.
Fichier principal
Vignette du fichier
PG2017-epjconf162570-J. Pachon.pdf (274.1 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01656548 , version 1 (15-01-2018)
hal-01656548 , version 2 (26-08-2020)

Identifiants

Citer

John Pachón-Morales, Julien Colin, Floran Pierre, Thibaut Champavert, François Puel, et al.. Flowability of lignocellulosic biomass powders: influence of torrefaction intensity. EPJ Web of Conferences, 2017, Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media, 140, pp.4. ⟨10.1051/epjconf/201714013017⟩. ⟨hal-01656548v2⟩
178 Consultations
83 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More