Abstract
The Flash Carbonization (FC) process is a novel procedure by which biomass is converted to biocarbon (i.e., charcoal) quickly and efficiently. To begin this process, a canister containing a packed bed of feedstock is placed within a pressure vessel, compressed air is used to charge the system to an initial pressure of ∼1−2 MPa, and a flash fire is ignited at the bottom of the bed. After about two minutes, air is delivered to the top of the bed and the biomass is converted to a high-yield biocarbon. In lab-scale tests, some fuels have been observed to ignite violently, resulting in a sudden drastic pressure rise (ΔP ≈ 1 MPa within 2−3 s). Because this event could be potentially hazardous, a study of this phenomenon was undertaken in preparation for a scale-up of the FC process to a commercial-sized demonstration reactor. The influence of initial pressure, feed moisture content, and ignition heater power were examined following a 23 full factorial experimental design approach. The combined effect of initial...
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