HIGH VOLATILE A BITUMINOUS COAL (from Utah A Seam)
C 80.5%; S 1.78%; mineral matter 10.8%; vitrinites 85.2%; exinites 2.9%; inertinites 11.9%
Utah, USA (Penn State Coal Sample Bank; PSOC 238)
suspension in methanol; 40 yg
Teq 610°C; tT 6s; tz 10s; Eei 15eV (Extranuclear 5000-1 Py-MS system)
remarks - This spectrum is very similar to that of the high volatile B bituminous coal of the same region (Uintah Region of Rocky Mountain Coal Province) with the exception of the markedly higher sulphur-containing ion signals at m/z 34 and 64. This correlates with the much higher S content (1.78% vs. 0.76%). Note, however, that the peak at m/z 48 (CH3SH+") remains low. The absence of obvious rank-related differences between the pyrolysis mass spectra of high volatile B and A bituminous ranks is typical. Characteristic rank related changes occur most strongly tyetween the HVCB and HVBB ranks and again between the HVAB and MVB ranks.
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