Abstract
AbstractA comprehensive study was conducted on the reactivify and the turbostratic structure of the unburnt carbon in the CFB fly ashes. The observed deactivation of the unburnt carbon and the pyrolysis chars prepared under various conditions was studied and found to be due to the combination of the loss of catalytic effect of the minerals and the crystalline growth of carbon. Various forms of morphology of the residual carbon particles were examined under a microscope. Both inertinite and vitrinite seem to be possible sources of the unburnt carbon. The formation of the unburnt carbon in the CFB fly ashes was likely caused by the deactivation of char particles and the insufficient residence time of the corresponding fuel particles.
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