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Titolo:
THERMODYNAMICS OF COAL-DERIVED FLUIDS .2. VAPOR-LIQUID-EQUILIBRIA OF COAL LIQUID FRACTIONS
Autore:
SRINIVASAN L; KABADI VN;
Indirizzi:
N CAROLINA AGR & TECH STATE UNIV,DEPT CHEM ENGN GREENSBORO NC 27411
Titolo Testata:
Fuel
fascicolo: 5, volume: 73, anno: 1994,
pagine: 714 - 722
SICI:
0016-2361(1994)73:5<714:TOCF.V>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNIFAC GROUP CONTRIBUTION; NARROW-BOILING DISTILLATES; LIQUEFACTION PRODUCTS; EXTENSION; MIXTURES; REVISION; DISTRIBUTIONS; COEFFICIENTS; PRESSURES; EQUATION;
Keywords:
COAL LIQUIDS; VAPOR LIQUID EQUILIBRIA; THERMODYNAMIC MODELS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
L. Srinivasan e V.N. Kabadi, "THERMODYNAMICS OF COAL-DERIVED FLUIDS .2. VAPOR-LIQUID-EQUILIBRIA OF COAL LIQUID FRACTIONS", Fuel, 73(5), 1994, pp. 714-722

Abstract

A thermodynamic model for prediction of vapour-liquid equilibria (VLE) in coal-derived fluids has been developed. The model uses group contribution methods for property evaluations and a continuous thermodynamics approach for VLE computations. A coal fluid is defined by multiplemolecular weight distributions, and each distribution is represented by an average molecule with fixed relative proportions of different functional groups. Besides the hydrocarbon group, phenolic, pyridinic and thiophenic groups are used to represent O, N and S heteroatoms. Fromthe results it is concluded that for low-boiling coal liquid fractions the phenolic compounds need to be treated separately, as opposed to the use of a single average molecule to define the coal liquid. Comparison with published data shows that the model is successful in predicting boiling ranges for low-boiling fractions. Failure of the model at higher temperatures is attributed to the binary interaction parametersin the UNIFAC model which are regressed from low-temperature binary VLE data.

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Documento generato il 13/07/20 alle ore 10:34:34