抄録
It is very important to examine the mechanism of coal pyrolysis under high pressure and high temperature for designing and operating entrained-bed type coal gasifier. We have recently found that the solid particles (residue) produced under rapid heating of bituminous coals to over 1000℃ at 〜2MPa consisted of so called char and coke. This means that the reaction forming coke from volatiles proceeded within coal particles under the operating conditions. This was presumed to be caused because the rate of coke forming reaction is larger than the volatilization rate of tar components in nano space of coal particles under the operating conditions. To confirm the presumption, pyrolysis of tar components adsorbed on several porous materials was performed using a pressurized curie point pyrolyzer that can be heated up to 1040℃ at the rate of 3000K/s under 〜2MPa.
