Abstract
This research investigated the effect of the furnace temperature on ash deposition behavior using digital image techniques and combined chemical equilibrium calculations with the improved model to calculate ash deposit viscosities at different temperatures. Three different furnace temperatures were selected: 1473, 1523, and 1573 K. In addition, the chemical components of the deposit samples were analyzed by scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectrometry (EDX). The results revealed that the growth process of the ash deposit at 1573 K was significantly different from those at 1523 and 1473 K. Meanwhile, it revealed that a low temperature can facilitate an increase in deposit thickness. The chemical equilibrium calculations indicated that the main crystalline phases in the three deposits were anorthite and hematite. The calculated results for ash deposit viscosity revealed that the viscosity of ash deposits decreased with increasing the temperature.
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