Abstract
The fuel characteristics, the combustion characteristics, and the kinetic study of sample that had been torrefied at 250 ~ 300 C were investigated for orange peel, rice husks, wood chips, and wood pellets. When higher torrefaction temperature was used, reduction of the yield, and increase in the fuel ratio, and decrease of volatile content were found. As a result, improvement of the fuel characteristics was confirmed. As parameters for the combustion characteristics, initial temperature (IT) was rised slightly because of the high torrefaction temperature of the wood chip, and burnout temperature (BT) showed lowered. The combustion time (t ) of torrefied wood chip (TC) is shorter than raw sample, and unburned carbon generation will be suppressed. The activation energy of the char combustion reaction (2nd) is reduction compared to the raw sample, and the pre-exponential factor was decreased. As a result, the combustion reaction rate constant (k) of the torrefied wood chips, should be determined considering the activation energy and the pre-exponential factor.
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