期刊
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
卷 98, 期 1, 页码 127-137出版社
WILEY
DOI: 10.1002/cjce.23592
关键词
self-heating; wood pellets; spontaneous combustion; kinetic parameters; activation energy
资金
- Wood Pellet Association of Canada (WPAC)
- Natural Sciences and Engineering Research Council of Canada
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 degrees 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 ( increment (r)hA) of (4.22 +/- 2.5) x 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.
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