Comparison of Syngas and Slag from Three Different Scale Gasifiers Using Australian Drayton Coal

摘要

Comparison of syngas composition, conversion efficiencies in gasification, and slagrncharacteristics was performed with the data from three different gasification systems forrnthe same seam Australian Drayton coal. Data on the syngas composition and conversionrnefficiencies from the 1 ton/day(T/D) gasifier in Korea were compared with published datarnfrom Shell gasification systems of 150 T/D pilot plant as well as from Shell commercialrnplant of 1,890 T/D scale. In addition, the shape and inner structure of slags obtained fromrnthe 1 T/D and a commercial-scale gasifier were compared to identify any gasifier-sizerneffect. Cold gas efficiency showed a decreasing trend with smaller gasifier size while therncarbon conversion was similarly more than 98% for all gasifier sizes. Slags from differentrnsize gasifiers exhibited a similar size and also the same indication of forming vesiculationrninside the structure. The results illustrate that the coal gasification performance can bernrealistically estimated even with the far smaller scale system.