Unlike coal combustion systems, the rate of carbon conversion in gasifiers is controlled by relatively slow gasification reactions of char with CO_2 and H_2O. It is known that a range of laboratory-determined parameters, such as devolatilisation yields, char structure, and intrinsic char reactivity, play significant roles in determining the high temperature conversion behaviour of coals under gasification conditions. In the open literature related to gasification, there are very limited data available to extend laboratory measurements to practical gasifier conditions. Some of our recent research helps us understand how the fundamental processes underpinning gasification impact on coal performance under more realistic conditions.
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