Surface reaction rates of coarse bituminous char particles in the temperature range 600 to 1340 K

Abstract

Measurements have been made of the surface reaction rates of char particles of 6.3 to 10 mm size in a tubular furnace in the temperature range of 600 to 1340 K. The char particles were prepared from Prince coal, Nova Scotia, Canada, in a furnace operated as a turbulent fluidized bed at 1123 K. Separate Arrhenius type equations were fitted to describe the reaction rate coefficients for particle temperatures below and above 1000 K. The apparent reaction order was determined as 0.8 and 0.6, for T_p < 1000 K and T_p > 1000 K, respectively. For the convenience of calculation, equations for apparent reaction orders of 0.5 and 1.0 are also given without introducing any significant error.