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Titolo: THERMODYNAMICS OF COALDERIVED FLUIDS .2. VAPORLIQUIDEQUILIBRIA 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:
 00162361(1994)73:5<714:TOCF.V>2.0.ZU;29
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 UNIFAC GROUP CONTRIBUTION; NARROWBOILING 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 COALDERIVED FLUIDS .2. VAPORLIQUIDEQUILIBRIA OF COAL LIQUID FRACTIONS", Fuel, 73(5), 1994, pp. 714722
Abstract
A thermodynamic model for prediction of vapourliquid equilibria (VLE) in coalderived 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 lowboiling 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 lowboiling fractions. Failure of the model at higher temperatures is attributed to the binary interaction parametersin the UNIFAC model which are regressed from lowtemperature binary VLE data.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 10:34:34