O-02 Formulation of gasification rate of woody biomass char and effects of various factors

Abstract

In our previous studies, the char produced from woody biomass pyrolysis for 10 min was gasified at the same temperature in a small fluidized bed. When both of the gasification rate measurement and pyrolysis were conducted at the same temperature, structure of the char produced at different pyrolysis temperatures was not same. In the present study, the char produced at a temperature from Eucalyptus camaldulensis (a broadleaf tree) was once cooled in 45 min to various temperatures and the gasification rate was measured at the temperatures. It was found that the gasification rate was increased again after it was once decreased, which was explained by the possible re-opening of pores with the progress of the gasification. Furthermore, though the rate was increased with temperature as expected up to the 1,000°C, it was reduced between 1,100 and 1,200°C, which was explained by the pore plugging with melted ash.