Polarizability of coal liquefaction product distillates☆Insight into intermolecular forces

White, Curt M.; Schmidt, Charles E.

doi:10.1016/0016-2361(87)90296-1

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…This suggests that the observed heat of mixing reflects significant changes in non-hydrogen bonded molecular interactions, which occur on mixing the various distillate fractions. This conclusion is in agreement with a previous study (17) of the polarizability of coal liquefaction product distillates which concluded that "van der Waals forces are the dominant intermolecular forces in the H-coal and Wilsonville distillates." Also, data on heats of mixing of pure compounds (18) show that heats of mixing of aliphatic hydrocarbons are generally much smaller than-the heat effects observed in this study, but that heats of mixing Can.…”

Section: Discussionsupporting

confidence: 93%

Heat of re-forming a coal liquefaction product from distillate fractions

Hansen¹,

Randzio²,

Lewis³

et al. 1988

Can. J. Chem.

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. Can. J. Chem. 66, 794 (1988).Results of calorimetric measurements of the heat of mixing of distillates from distillation of an H-coal liquefaction product are reported. The measurements were made at 373 K with mixing ratios such that the resultant mixture was the same as before distillation. The heat of mixing, which was endothermic in all cases, was found not to be a result of hydrogen bond formation. Intermolecular interactions of aromatic compounds are the probable source of the heats of mixing observed. On rapporte les rksultats de mesures calorimttriques de la chaleur de mtlange de distillats obtenus par distillation d'un produit de liqutfaction H-charbon. On a fait les mesures a 373 K , avec des rapports de melange tels que le produit qui en rksulte est le m&me que celui qui existait avant la distillation. I1 ne semble pas que la chaleur de melange, qui est endothermique dans tous les cas, provienne de la formation d'une liaison hydrogkne. I1 est probable que la chaleur de mClange observee est due aux interactions intermolCculaires des produits aromatiques.[Traduit par la revue]

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Section: Discussionsupporting

confidence: 93%

Heat of re-forming a coal liquefaction product from distillate fractions

Hansen¹,

Randzio²,

Lewis³

et al. 1988

Can. J. Chem.

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show abstract

“…White and Schmidt 68 have found that the mid-boiling point (about 450-800 K) of distillates from R-Coal and Wilsonville liquefaction products is a linear function of their average molar volume and average molar polarizability, which are directly related to van der Waals interaction. White and Schmid wrote that the results obtained support, but not prove, the conclusion that van der Waals forces are the dominant intermolecular forces, determining their boiling points.…”

Section: Interactions Responsible For Colloidal Structure Formationmentioning

confidence: 99%

Molecular and Colloidal Structure of Coal Asphaltenes and Other Heavy Solvent Soluble Components

Iino

Takanohashi

1998

Structures and Dynamics of Asphaltenes

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“…Besides the obvious problem of the production and mobilisation of dangerous concentrations of potent carcinogenic compounds, there are practical unanswered questions relating to the structural integrity of the thermally-damaged geological formations surrounding UCG syngas production that need to be addressed, Fig. 7 Dependence of the solubility enhancement factor on the polarizability for several polycyclic aromatic compounds in sCO 2 at 100 bar and 310 K. The data points correspond, in increasing order, to: (1) fluorene, 66 (2) phenanthrene, 66 (3) anthracene, 66 (4) pyrene, 66 (5) fluoranthene, 67 (6) chrysene 66 and ( 7) perylene. 67 since the behaviour of compressed gasses at high pressure and temperature in a fractured formation cannot easily be predicted.…”

Section: Conclusion and Final Commentsmentioning

confidence: 99%

“…7 Dependence of the solubility enhancement factor on the polarizability for several polycyclic aromatic compounds in sCO 2 at 100 bar and 310 K. The data points correspond, in increasing order, to: (1) fluorene, 66 (2) phenanthrene, 66 (3) anthracene, 66 (4) pyrene, 66 (5) fluoranthene, 67 (6) chrysene 66 and ( 7) perylene. 67 since the behaviour of compressed gasses at high pressure and temperature in a fractured formation cannot easily be predicted.…”

Section: Conclusion and Final Commentsmentioning

confidence: 99%