바이오원유 제조를 위한 Palm Kernel Shell의 급속열분해에서 바이오매스 입자크기의 영향

Biomass is considered one of the most promising renewable energy sources, which are being actively researched due to the depletion of fossil fuels and the global warming issue. Biocrude-oil can be produced through the fast pyrolysis of various biomass feedstocks, such as wood, crops and agricultural and forestry residues. Because the heat transfer from the hot sand to the biomass particles is important in the fast pyrolysis process, the particle size is one of the key factors involved in controlling the fast pyrolysis process. In this study, PKS (Palm Kernel Shell) was used for fast pyrolysis to study the effect of the biomass particle size on the fast pyrolysis characteristics in a tilted-slide reactor with a biomass capacity of 20 kg/h. The raw biomass was crushed and ground first, and the resulting particles were sieved into three ranges of particle size, d < 0.5 mm, 0.5 mm < d < 1.0 mm, and 1.0 mm < d < 2.0 mm. At a low pyrolysis temperature, the biocrude-oil yield increased with increasing particle size, while at medium and high temperatures the yield did not show much variation with the particle size. The heating value of the biocrude-oil increased with increasing particle size at low temperature, while it decreased significantly at high temperature.