2014 年 93 巻 9 号 p. 931-935
Measurements of temperature and gas generation during fast pyrolysis of lignocellulosic biomass in paying attention to the effects of the setting temperature TS and type of biomass have been studied experimentally. From the time courses of the temperature at the center TC of a cornel particle, there could be two regions due to the endothermic reactions of biomass during pyrolysis and exothermic char formation from tar. Between these two regions, the endothermic reactions of biomass during pyrolysis could be completed at about 690 K. The exothermic behavior was observed at TS < 873 K. On the other hand, the maximum generated gas flow rate Gmax increased dramatically at TS > 773 K due to both the endothermic reactions of biomass during pyrolysis and the decomposition of generated tar. From the time courses of the temperature at the center TC of the fragment of palm kernel shell (PKS), the slight endothermic and obvious exothermic behaviors were observed. The maximum difference between the TC and the ambient temperature TA at the exothermic region for the PKS fragment was higher than that for the cornel particle. The maximum gas flow rate for the PKS fragment was larger than that for the cornel particle.
