Low-temperature air oxidation of caking coals. 2. Effect on swelling and softening properties
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Coal weathering and laboratory (artificial) coal oxidation
2017, International Journal of Coal GeologyCitation Excerpt :decrease in free-swelling index (FSI) (La Grange, 1950; Savage, 1951; Jackman et al., 1957; Wen and Sun, 1976; Gray et al., 1976; Pearson and Kwong, 1979; Pearson and Creaney, 1981; Mathews and Bustin, 1984; Huggins et al., 1985, 1987; Larsen et al., 1986; Wu and Winschel, 1986; Wu et al., 1987; Cagigas et al., 1987), loss of swelling and fluid properties of coals (Schmidt and Elder, 1940; Schmidt, 1945; Loison et al., 1963; Benedict and Berry, 1964; Kona et al., 1968; Freyer and Szladow, 1973; Kojima and Ogoshi, 1973; Guyot and Pollard, 1974; Ignasiak et al., 1974; Wachowska et al., 1974; Gray et al., 1976; Crelling et al., 1979; Mahajan et al., 1980; Anderson and Hamza, 1982; Malony et al., 1982; Lin et al., 1983; Liotta et al., 1983; Marchioni, 1983; Senftle and Davis, 1984; Huffman et al., 1985; Pis et al., 1988; Wu et al., 1988; Clemens et al., 1989; Davidson, 1990; Valia, 1990; Worasuwannarak, 2002; Casal et al., 2003; Crelling, 2008; Suárez-Ruiz and Ward, 2008), loss of coking ability at exposure to air at 60–80 °C (Boyapati et al., 1984; Smith et al., 2001),
Low-temperature oxidation of some Turkish coals
2012, FuelCitation Excerpt :Oxidation of coal has received much attention since it is responsible from the major compositional and structural changes in the weathering of coal [1–11]. Oxidation of coal causes deterioration in the technological properties of coal such as coking and caking [12–15]. Furthermore, reaction of coal with oxygen may lead to self-heating and subsequent spontaneous combustion in coal mines and stock piles and cause to safety problems and property losses.
Effect of coal pre-oxidation on the optical texture and porosity of pyrolysis chars
2006, Journal of Analytical and Applied PyrolysisCompositional and structural changes during aerial oxidation of coal and their relations with technological properties
1998, Vibrational Spectroscopy