47.各種石炭チャーのCO_2加圧ガス化(2)

抄録

Standard coals chosen for BRAIN-C project and their demineralized chars were gasified with CO_2 at temperatures and pressures up to 1373K and 2.5Mpa respectively, to examined the influence of coal species, pressure, and temperature on the reactivity. Also, factors govering the reactivity were investigated through changes in physical and chemical properties such as carbon structure, porous structure, and chemical forms of indigenous mineral matters for ungasified portions at different conversions. The gasification rate at 1373K and 2.5MPa for demimemlized chars was larger than that for raw coals. This can explained by larger catalytic activity loss of calcium through interaction with silica and/or alumina for raw coals and larger surface area for demineralized chars.