Wyodak coal comparison

Figure 8. Comparison of Number of Bonds per Bead for a) Original Wyodak Coal (initial crosslinks = 290, initial extract yield = 7.4%, oligomer length = 10 and hard bonds = 200) and c) Modified Wyodak Coal (initial crosslinks = 600, initial extract yield = 21.5%, oligomer length = 4 and hard bonds = 0). b and d Compare the Fluid Fraction and Extract Yield for Original Wyodak Coal and Modified Wyodak Coal, Respectively.

H-Coal naphthas and distillates derived from Illinois No. 6 (Burning Star Mine) and Wyodak coals were supplied by Hydrocarbon Research, Inc. The naphthas and distillates were blended in the appropriate proportions to obtain a whole syncrude derived from each coal. Properties of these syncrudes are shown in Table I. For comparison, Table I also shows properties of the SRC-II syncrude used in the study described in the previous chapter. The SRC-II syncrude was derived from a West Virginia coal (Pittsburgh Seam, Blacksville No. 2 Mine of the consolidated Coal Company). The H-Coal and SRC-II syncrudes are not directly comparable because the coals used to derive these syncrudes differ. 

Figure 6. Comparison of elemental analyses obtained by distillation and heptane precipitation from liquefaction of Wyodak coal with —019 solvent...

Figure 8. Comparison of elemental analyses of SRC from liquefaction of Wyodak coal in —019 (-----------) and —035 (-------) solvents (heptane precipitation data)...

Fi re 2. Comparison of FT-IR Spectra for Residue and Parent Coal for PSOC-1401 Wyodak Subbitiuninous Coal. 

COMPARISON OP SEVERELY HYDROTREATED PRODUCTS FROM ILLINOIS H-COAL, WYODAK H-COAL,... 

A comparison of the effect of the two solvents on the composition of SRCs from Wyodak subbituminous coal is shown in Figure 8. Compared to the hydrogen-enriched solvent, use of the hydrogen-depleted solvent results in a SRC with higher sulfur and oxygen contents and lower carbon and hydrogen contents. 

Figure 3. Comparison of conversion of MAF Wyodak (—035 solvent (A/ —0/9 solvent (0)) and Monterey (—035 solvent (O) —019 solvent ( Z )) coals to pyridine solubles (based on ash analysis)...

Figure 13. Comparison of elemental analyses of nondistillable products from liquefaction of Wyodak and Monterey coals in —035 solvent...

Comparison of analyses of heptane insolubles from the liquefaction of Monterey bituminous and Wyodak subbituminous coals in the hydrogen-enriched solvent shows that carbon, hydrogen and oxygen concentrations converge with increasing reaction severity to form a product with similar elemental analyses. The same convergence is seen when the hydrogen-depleted solvent is used. 

Acyclic Hydrocarbons. Capillary GC comparison of retention times with authentic standards and GC/MS were used to characterize the acyclic alkanes present in the CHX extracts. The extracts of Beulah 3 North Dakota lignite (B3), Wyodak Wyoming subbituminous coal (WYOl), Highvale Alberta subbituminous coal (ALBl), and Powhatan Ohio bituminous coal (POWl) all contained homologous series of n-alkanes. Table III. The low-rank coal CHX extracts for the limited members of the... 

Figure 3. Comparison of n-alkane extract distribution for Wyodak subbituminous coal, O, and n-alkane distribution from CPU bottoms recycle product, (Wyodak subbituminous coal).

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