Studies related to the structure and reactivity of coals

Redlich, Peter J.; Jackson, W. Roy; Larkins, Frank P.; Chaffee, Alan L.; Liepa, I.

doi:10.1016/0016-2361(89)90293-7

Cited by 7 publications

(7 citation statements)

References 18 publications

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“…Analysis of Tetralin-free Oils. Previous work has shown that the character of light products changes little with reaction conditions (350− 425 °C) 1-3,5,6,9,10 and is similar to that of the products of py−GC/MS. , This section presents the GC/MS data for the oils; solution 1 H NMR supports the GC/MS data but does not give further insight (as found by Redlich et al , ) and so will not be discussed further.…”

Section: Resultsmentioning

confidence: 86%

“…Figure shows the total ion chromatograms (TIC) of the oils from all five coals for reaction with SnO 2 at 405 °C for 1 h. For DECS 6, the TIC was dominated by long-chain alkanes and two-ring aromatic compounds, as for Surat Basin coal oil . For the other four oils, the chromatograms were similar in peak distribution up to 35 min retention but significant differences were found at higher retention times.…”

Section: Resultsmentioning

confidence: 94%

“…All experimental procedures used in this study have been described previously. − Briefly, hydrogenation experiments were carried out using coal that had been acid-washed and dried under nitrogen at 105 °C. A coal−tetralin (3 and 9 g, respectively) mixture was heated in an autoclave (70 mL) under 6 MPa initial hydrogen pressure for 1 h at 405 °C.…”

Section: Methodsmentioning

confidence: 99%

“…The elemental analysis and volatile matter of the coals and the elemental analysis of the residues, asphaltenes, and tetralin-free oils generated by the reactions were determined by standard methods. , The coals and asphaltenes were also analyzed by solid-state CP/MAS 13 C NMR following the procedure and using the parameters described previously 7 and asphaltenes and oils by 1 H NMR. , The f a values were obtained from the 13 C NMR spectra. The tetralin-free oils were also analyzed by GC/MS. , …”

Section: Methodsmentioning

confidence: 99%

“…Redlich et al . − have used a combination of reactions under prescribed conditions and a range of analytical techniques to correlate the atomic H/C ratio of coals with their structure and reactivity. In this study their techniques will be applied to the range of coals used in the previous work. , …”

Section: Introductionmentioning

confidence: 99%

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Structural Characterization of Some North American Coals

et al. 1998

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The structure of five U.S. coals (three of low rank or sub-bituminous and two of high rank) has been investigated using reactivity criteria and spectroscopic methods. The results suggest that one of the high-rank coals PSOC 831 contains more cross-linking groups within its macromolecular structure than the other high-rank coal DECS 12. These cross-linkages help to explain some previously reported anomalous results resulting from reactions of PSOC 831 with hydrogen in the presence of MoS 2 . The DECS 9 and PSOC 1379 were shown to be typical low-rank coals and gave significant "guest"-derived materials (terpenoid and wax-derived hydrocarbons) from pyrolyses at 320 and 350 °C, and the sub-bituminous coal DECS 6 showed many structural similarities when compared with a range of other sub-bituminous coals from Central Queensland, Australia.

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