54.石炭マセラル熱分解チャーの形状とガス化反応性

抄録

In order to investigate the relationship between char structure and coal maceral groups, SB and BT coals were used in this study. The two coals with size fraction of 90-105μm were first separated into several factions using sink-float method, and then the separated fractions were pyrolyzed at 1000℃ under different heating rates, and the resultant chars were observed using SEM. The morphology of char changes significantly among different density fractions and heating rates. Fractions with density larger than 1.4g/cm^3, containing mostly inertinite, show little melting or swelling property. On the other hand, the fractions with density smaller than 1.4g/cm^3, containing mostly vitrinite, are well melted or swelled after heated at higher heating rate. It is clear that maceral group and heating rate are controlling factors for the formation of char structure.