Coal Mineral Matter Transformation During Combustion and Its Effects on Gas Turbine Blade Deposition and Erosion

[+] Author and Article Information
S. Rajan, J. K. Raghavan

Department of Mechanical Engineering and Energy Processes, Southern Illinois University at Carbondale, Carbondale, IL 62901

J. Eng. Gas Turbines Power 115(3), 634-640 (Jul 01, 1993) (7 pages) doi:10.1115/1.2906753 History: Received July 19, 1991; Online April 24, 2008


The reaction pathways along which mineral matter is transformed during pulverized coal combustion and the corresponding characteristics of the ash formed are especially important from the standpoint of coal-fired gas turbine operation. Using a novel FT-IR technique and EDX analysis, these mineral matter transformations are investigated when coal is burned in a pulverized coal-dust burner. The mineral transformations of quartz, gypsum, calcite, dolomite, pyrite, and those of the aluminosilicate minerals, kaolinite and montmorillonite, have been evaluated. Discussion of the results focuses on the effect of these mineral transformations on the deposition and erosive characteristics of the resulting combustion-generated ash.

Copyright © 1993 by The American Society of Mechanical Engineers
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