Coal Gasification and Resultant Products

The mineral matter associated with coal undergoes various transformations during the coal gasification process, with the temperature of transformation of pyrite depending on either the reducing or oxidizing conditions present in the gasifier. The temperatures may vary due to possible trace elements present in the pyrite structure [16,17]. 

AFT results of the centrifuge overflow sample and those where different amounts of iron were added under oxidizing conditions clearly showing the lowering of the AFT with increasing amounts of iron present. 

Optimization of the gasification process is always a necessity and, for example, agglomeration due to heat-induced transformation of the mineral matter inside the gasifier can cause various undesirable operational conditions, implying a loss in gas production [18-20]. 

In order to determine the temperature profile, vitrinite reflectance techniques were used, based on the ISO 7404-5 standard method, and the vitrinite reflectance analyses were performed on the whole range of the sifier turn-out samples. 

Graphical representation of a gasifier with the resultant temperature profile observed in the gasifier [19,20]. 

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