Torrefaction Of Cellulose: Validity And Limitation Of The Temperature/Duration Equivalence - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Bioresources Année : 2012

Torrefaction Of Cellulose: Validity And Limitation Of The Temperature/Duration Equivalence

Résumé

During torrefaction of biomass, equivalence between temperature and residence time is often reported, either in terms of the loss of mass or the alternation of properties. The present work proposes a rigorous investigation of this equivalence. Cellulose, as the main lignocellulosic biomass component, was treated under mild pyrolysis for 48 hours. Several couples of T-D (temperature-duration) points were selected from TGA curves to obtain mass losses of 11.6%, 25%, 50%, 74.4%, and 86.7%. The corresponding residues were subjected to Fourier transform infrared spectroscopy for analysis. According to the FTIR results, a suitably accurate match to global T-D equivalence is exhibited up to 50% mass loss: in this domain, mass loss is well correlated to the treatment intensity (molecular composition of the residue) except for slight differences in the production of C=C and C=O. For mass loss levels of 74.4% and 86.7%, distinct degradation mechanisms take place at different combinations of temperature and duration, and the correlation fails. Compared to the mass loss at 220 degrees C and 250 degrees C, the equivalent molecular composition can be achieved through treatment at 280 degrees C with shorter treatment time and less depolymerization and oxidation. The main conclusion drawn is that mass loss can be used as a synthetic indicator of the treatment intensity in the temperature range of 220 degrees C to 280 degrees C up to a mass loss of 50%.
Fichier principal
Vignette du fichier
2924-13056-1-PB.pdf (834.09 Ko) Télécharger le fichier
Origine : Accord explicite pour ce dépôt
Loading...

Dates et versions

hal-01053128 , version 1 (18-01-2016)

Licence

Paternité - Partage selon les Conditions Initiales

Identifiants

  • HAL Id : hal-01053128 , version 1
  • PRODINRA : 216275
  • WOS : 000307639900080

Citer

Pin Lv, Giana Almeida, Patrick Perré. Torrefaction Of Cellulose: Validity And Limitation Of The Temperature/Duration Equivalence. Bioresources, 2012, 7 (3), pp.3720 - 3731. ⟨hal-01053128⟩
220 Consultations
35 Téléchargements

Partager

Gmail Facebook X LinkedIn More