Molecular interaction of quinoline with coal-liquid fractions
| Autor: | Krishna C. Tewari, Jin-Tsai Wang, Herman J.C. Yeh, Norman C. Li |
|---|---|
| Rok vydání: | 1979 |
| Předmět: |
chemistry.chemical_classification
Base (chemistry) General Chemical Engineering Organic Chemistry Enthalpy Quinoline Analytical chemistry Energy Engineering and Power Technology Aromaticity Fraction (chemistry) Solvent chemistry.chemical_compound Fuel Technology chemistry Organic chemistry Equilibrium constant Asphaltene |
| Zdroj: | Fuel. 58:371-374 |
| ISSN: | 0016-2361 |
| DOI: | 10.1016/0016-2361(79)90155-8 |
| Popis: | A direct calorimetric method has been used to determine simultaneously the molar enthalpy, ΔHo, and equilibrium constant, K, for the interaction of quinoline (Qu) with coal-derived asphaltenes (A), acid/neutral (AA) and base (BA) components of A, silylated asphaltenes (A(TMS)) and heavy oil (HO) fractions in solvent C6H6. Solvent fractionated A and HO fractions were from three centrifuged-liquid product (CLP) samples prepared in the 450 kg (≈12 U.S. ton) per day Process Development Unit at Pittsburgh Energy Research Center, at different process conditions from the same feed coal, Kentucky hvAb. For a given system, Qu-A (AA or BA), Qu-HO, the almost constant value of K and rectilinear variation of ΔHo with the phenolic oxygen content of coal-liquid fractions have been attributed to the dominance of hydrogen-bonding effects, involving phenolic OH, over other types of molecular interactions in solution. In the Qu-A(TMS) system, −ΔHo values increase with decrease in molecular weight of A(TMS), while −ΔSo values increase with increase in aromaticity of the A fraction. The degree of complexation, in absence of OH groups, is much smaller than with the Qu-A system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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