The influence of char morphology on the catalytic gasification of taiheiyo coal.

Each maceral of Taiheiyo coal was concentrated under a density separation technique and was carbonized under a quick heating in a fluidized bed.The char prepared from exinite-and vitrinite-rich part of coal has pores with a thick wall, while the char with more minerals, specific gravity of < 1.40, showed an opposite tendency.The catalyst dispersion state in the catalyzed char was as follows.The concentration of the catalyst in the mineral-poor char was high on the macropore surface and low in the wall. In the mineral-rich char, the catalyst dispersion was better than the above.Therefore, the catalytic reactivity of a char with a larger specific gravity is higher than that with a smaller specific gravity.