Journal of Industrial and Engineering Chemistry, Vol.11, No.2, 228-234, March, 2005
Comparison of Syngas and Slag from Three Different Scale Gasifiers using Australian Drayton Coal
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Syngas composition, conversion efficiencies in gasification, and slag characteristics were compared for the data from three different gasification systems with the same seam of Australian Drayton coal. Particularly, data on the syngas composition and conversion efficiencies from the 1 ton/day (T/D) gasifier in Korea were compared with published data from shell gasification systems of 150 T/D pilot plants as well as from shell commercial plants of 1890 T/D scale. In addition, the shape and inner structure of slags obtained from the 1 T/D and a commercial-scale gasifier were compared to identify any gasifier-size effects. Cold gas efficiency showed a decreasing trend with smaller size gasifier while the carbon conversion was similarly more than 98% for all size gasifiers. Slags from different size gasifiers exhibited a similar size and also the same indication of forming vesicular voids inside the structure. The results illustrate that the coal gasification performance can be realistically estimated even with a far smaller scale system.
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