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More than 100 graphical coal structural models have proposed in the literature but their suitability has not been studied. All the coal models are in essence conceptual images, which are not very useful in quantitative analyses. This article analyzes the validity of 25 models selected from 134 models reported in the literature using the carbon content (C%) and aromaticity (fa) data of coals reported...
This paper was addressed to evaluate the sintering behavior of coal ash at different temperatures under oxy-fuel combustion (O2/CO2 combustion) atmosphere. A lignite (Zhundong coal) characterized by high sodium level has been applied as the fuel material. The raw ash was heat treated at four different temperatures: 1350, 1300, 1250, and 1200°C, respectively. In addition, two atmospheres has been applied...
Digital image technique was applied to monitor the slagging characteristics of easy to slagging (ES) coal in a pilot scale furnace. Mineral of the ash deposit was analyzed by X-ray diffraction (XRD), chemical composition and microstructure of the ash deposit were analyzed by scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectrometry (EDX), respectively. The ash deposition...
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