High-Temperature Interactions between Coal Char and Mixtures of Calcium Oxide, Quartz, and Kaolinite
作者： Jie Wang , Kayoko Morishita , Takayuki Takarada
DOI: 10.1021/EF0100092
关键词:
摘要: The interaction between coal char and mixtures of calcium oxide, quartz, meta-kaolinite were investigated by heating to 1600 °C under Ar. Calcium oxide was gradually reduced in the temperature range 950−1450 °C, then rapidly carbided above 1450 releasing CO. In case CaSiO3, carbothermal reduction SiO2 component started at 1200 preference CaO component, forming SiC Ca2SiO4; higher temperature, both components Ca2SiO4 significantly. When mixed with meta-kaolinite, two phases reacted each other below °C. chemically bound CaO−SiO2−Al2O3 system, reactivity sequence > Al2O3; also began SiC; upon presence a alumimum carbide (approximately CaAl1.9O4C0.4) notable. became difficult reduce as it combined Al2O3. On o...
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