Combustion characteristics of chars from raw and torrefied willow
There is much interest in co-firing biomass with coal in power plants. Torrefaction is a mild thermal pretreatment (T < 300°C) that improves the milling and storage properties of biomass, making it more like coal, and thus more compatible with existing power plant equipment. We use non-isothermal thermogravimetric analysis to investigate the differences in oxidative reactivities between chars prepared from torrefied and raw willow. Both high- and low-heating-rate chars are investigated. High-heating-rate chars were prepared in a drop tube furnace at a temperature of 900°C with a residence time of 2 s. Low-heating-rate chars were prepared in a crucible in a tube furnace, with a heating rate of 33°C/min, a maximum temperature of 1000 ?C, and a residence time of 1 hour at the maximum temperature. We find that torrefaction has a minimal impact on char reactivities for the low-heating-rate chars, while for the high-heating-rate case the chars prepared from raw willow are over twice as reactive as those prepared from torrefied willow.
| Main Authors: | , , , , , , , |
|---|---|
| Format: | conference_item biblioteca |
| Language: | eng |
| Published: |
s.n.
|
| Subjects: | K50 - Technologie des produits forestiers, P06 - Sources d'énergie renouvelable, produit dérivé du bois, traitement thermique, carbonisation du bois, bois, pyrolyse, Salix, charbon de bois, torréfaction, http://aims.fao.org/aos/agrovoc/c_16203, http://aims.fao.org/aos/agrovoc/c_24947, http://aims.fao.org/aos/agrovoc/c_28044, http://aims.fao.org/aos/agrovoc/c_8421, http://aims.fao.org/aos/agrovoc/c_26874, http://aims.fao.org/aos/agrovoc/c_6754, http://aims.fao.org/aos/agrovoc/c_1503, http://aims.fao.org/aos/agrovoc/c_28596, |
| Online Access: | http://agritrop.cirad.fr/560539/ http://agritrop.cirad.fr/560539/1/document_560539.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|