Search

Steam gasification of weather ed (deposit over lay) and ener gy (depth of ≥300 m) coal samples of Tavantolgoi deposit situated in Tsogttsetsii soum, Umnugovi aimag were performed in this study. Relationship between coal inherent minerals and catalysts (Fe, Na, binary Fe-Na) in the gasification was investigated in a flow of Ar and steam (1:1) mixture with a rate of 200ml/min at temperature of 800°C for 1h using a fixed bed stainless reactor. Conversion of organic matter was 81.8% for the weathered coal sample, and 21.5% for the energy coal sample during non-catalytic gasification of Tavantolgoi coal. Large amount of inherent calcium minerals included in the weathered coal showed a catalytic effect on gasification activity. However, these minerals reacted actively with sodium catalysts (Na or binary Na-Fe) in stages of pyrolysis and gasification, consequently the catalysts lost their activities. Moreover, Fe ore did not have influence of catalyst in steam gasification of both weathered and energy coal samples. Moreover, an inherent Ca content of the energy coal sample was 10 times smaller than that of weathered coal sample. Gasification activity of the energy coal increased significantly with Na catalyst, and the amount of syngas increased 4.6 times compared to that evolved in noncatalytic gasification of the energy coal. [ABSTRACT FROM AUTHOR]