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- Title
Investigation of wood pellets self‐heating kinetics and thermal runaway phenomena using lab scale experiments.
- Authors
Guo, Wendi; Bi, Xiaotao; Lim, C. Jim; Sokhansanj, Shahab
- Abstract
The phenomena of spontaneous combustion and thermal runaway in wood pellets storage were investigated using lab‐scale experiments in the temperature range of 100–200 °C. The critical temperatures were determined for four sizes of reactors. The kinetic parameters of the self‐heating were determined using three methods, the Frank‐Kamenetskii's method, crossing point method, and numerical curve fitting method. Mean values of activation energy (E) of 78.7 ±0.8 kJ/mol and self‐heating rate constant (∆ rhA) of (4.22 ±2.5) × 10 6 kJ/(kg s) were obtained for four type of wood pellets (made from whitewood) samples from different pellet producers in British Columbia. Finally, a two‐dimensional numerical model was developed to predict the temperature development during self‐heating and the critical temperature for known sizes of reactors.
- Subjects
BRITISH Columbia; WOOD pellets; SPONTANEOUS combustion; CRITICAL temperature; ACTIVATION energy; CURVE fitting
- Publication
Canadian Journal of Chemical Engineering, 2020, Vol 98, Issue 1, p127
- ISSN
0008-4034
- Publication type
Article
- DOI
10.1002/cjce.23592