50.石炭の高温・高圧ガス化時に生成する石炭チャーに含まれる低反応性炭素分のガス化特性の検討

抄録

We have previously clarified that a large amount of coke, which deposited from volatiles, was formed during the pyrolysis of coal at high temperature and high pressure using a miniature tubing-bomb reactor (mini-TBR) developed by the authors. In this study, the effect of pyrolysis temperature and time on the product yields was examined using the mini-TBR. The composition of the product obtained at 1200℃ at 1min of residence time coincided well with the composition estimated by equilibrium calculation, indicating that the equilibrium state is attained rather rapidly under the experimental conditions. Next, the gasification reactivity of the carbonized material prepared using a pressurized drop tube furnace (PDTF) was examined using a thermobalance by temperature-programmed reaction (TPR) technique. Some of the carbonized materials were gasified in two steps, indicating that they consisted of char and coke. The amount of the coke could be estimated through the kinetic analysis of the TPR experiments.