Blind Canyon coal

Blind Canyon coal. Lewiston-Stockton coal. Pittsburgh coal. 

Py-FIMS results clearly reveal the existence of a thermally extractable, bitumen-like fraction which is chemically distinct from the remaining coal components. In lignite, several biomarker compounds were noticeable in the mobile phase components while bituminous coals contain various alkylsubstituted aromatic compounds in the mobile phase. Blind Canyon coal, which contains 11% resinite, exhibits mobile phase components believed to originate from terpenoid aromatization. Curie-point Py-LVMS results illustrate the importance of the oxidation status of coal for studying the mobile phase since mild air oxidation severely changes the structural characteristics of the thermally extractable mobile phase. 

Mobile phase spectra of Blind Canyon coal look rather similar to Beulah-Zap lignite coal with regard to the peaks at m/z 324, 342, 424. Alkylsubstituted naphthalenes components are clearly separated and the other dominant peaks at m/z 310, 324, 342, 356 are believed to originate from triterpenoid aromatization (26). The mass spectra of Blind Canyon coal, which contains 11% resinite, illustrate the importance of depositional environment as well as of rank in determining the components in the mobile phase. 

Figure 5. Thermally extracted mobile phase components over different temperature intervals from Illinois 6 and Blind Canyon coals.

Figure 1 The derivative ESR spectra under evacuated conditions at room temperature for Blind Canyon Coal (81.6% C [see text]) and a Kentucky coal (81.5% C [from Reference 14]).

For many of our studies carried out in recent ye[Pg.306]

T for the Blind Canyon coal for several different cases (sealed, N2 flow,... 

In retrospect, attempts at such correlations are somewhat flawed because of the significant effects of ash present in the coals on the free radicals. For these reasons, as noted earlier. Blind Canyon coal is the most suitable American coal for understanding the role of ESR free radicals in coal conversion processes. 

Figure 6 Temperature variation of the free radical Intensity N for Blind Canyon coal and coal-mixed materials as Indicated (see text for details). In the calculation of N, corrections for mass changes and Curie law have been applied (from Reference 50).

Figure 11 Variation of the free radical Intensity N with temperature for Blind Canyon coal and the coal mixed (1 1) with Goodyear and MIchelln treads (from Reference 59).

Blend modulus, 20 346, 347 Blends, polycarbonate, 79 824-825 Blind Canyon (HVB) coal... 

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