51.加圧型管状反応器を用いた石炭燃焼性の検討

抄録

A high pressure drop-tube reactor was used to estimate the combustion reactivity of the coal for effect of coal rank and pressure. When the coal combustion under pressurized was conducted by using the coal which an index of unburned carbon (Uc%) on coal combustion was about 30% to 40% at atmospheric pressure, Uc% decreased to 2% and combustion reactivity of the coal was improved. Increase in pressure increased evolution of volatile matter and its concentration around particles due to diffusion coefficients being proportional to 1/pressure, therefor it seemed that rise of temperature at ignition of coal particle was higher under pressurized than at atmosphere pressure and char combustion of next stage was accelerated.