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In this study, we aimed to estimate the weight fraction of crystalline phases in a cathode deposition formed by DC arc-discharge between graphite electrodes in water via the XRD method and CARBON XS program based on Shi model, which takes into account disorder and stacking faults in a graphite structure. The structural computation of graphitic carbon materials for comparison was done by using CARBON XS according to Shi model. From the study, we observed that the total weight fraction of 2H hexagonal and 3R rhombohedral ordered structures of graphitic carbon decreases from 77.69% to 48.98%, whereas the weight fraction of random shift and stacking faults increases from 22.31% to 51.02% as compared to these parameters belonging to pure graphite structure during the arc-discharge process.
Products from combustion in arc discharge region such as soot and ash have been analyzed by using various techniques and analyzing methods. The some physical properties of particulates of soot and ash from coal combustion are determined. (i) The elemental analysis on particulate surface was done for soot and ash and elements in them were determined. Noncombustible elements are dominated in spectrum of ash, however they encounter rarely in soot. (ii) The results from the morphological analysis on particulates of soot by using SEM and BET show that they tend to have large free surface and pore volume. The size of pore in soot and ash particulates decreases with their diameter. The ash particulates are infe rred as poor porous material from result of study. The circularity and roundness of soot is higher than ash particulates.
