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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Apparent and Partial Molar Volumes at Infinite Dilution and Solid-Liquid Equilibria of Dibenzothiophene plus Alkane Systems

Texto completo
Autor(es):
de Oliveira, Leonardo Hadlich [1] ; da Silva, Jr., Julio Lopes [1] ; Aznar, Martin [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Sch Chem Engn, BR-13083852 Campinas, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF CHEMICAL AND ENGINEERING DATA; v. 56, n. 11, p. 3955-3962, NOV 2011.
Citações Web of Science: 5
Resumo

Densities of binary mixtures of dibenzothiophene (DBT), 4-methyl-dibenzothiophene (4-MDBT), or 4,6-dimethyldibenzothiophene (4,6-DMDBT) with alkanes were measured at T = (298.2 and 313.2) K. Apparent molar volumes V(phi), and partial molar volume at infinite dilution (V) over bar (infinity) of solutes were obtained, respectively, by experiments and by fitting V(phi) data to the Redlich-Meyer equation. (V) over bar (infinity) increases with the solvent chain length for DBT solutions in linear alkanes, reaching a limiting value of 149.5 cm(3).mol(-1) at 298.2 K; the alkylation of the DBT molecule in positions 4 and 6 also increases (V) over bar (infinity). The infinite dilution transference volume Delta(V) over bar (infinity)(tr) from cyclohexane to n-hexane is -10 cm(3).mol(-1) at T = 298.2 K, and from iso-octane to n-octane the transference volumes are (1.4 and 4.3) cm(3).mol(-1) at T = (298.2 and 313.2) K, respectively. Solid liquid equilibrium data for the same binary mixtures were determined. At 298.2 K, the maximum solubility of DBT in linear alkanes increases with solvent chain length, is greater in cyclohexane than in n-hexane, and is lower in iso-octane than in n-octane. For studied solutes, the maximum solubility in n-dodecane has the following order: 4,6-DMDBT < DBT < 4-MDBT. (AU)

Processo FAPESP: 07/52032-2 - Estudo termodinâmico do equilíbrio líquido-líquido visando a remoção de enxofre do óleo diesel usando líquidos iônicos
Beneficiário:Martin Aznar
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 07/53024-3 - Estudo termodinâmico do equilíbrio líquido-líquido visando a remoção de enxofre do óleo diesel usando líquidos iônicos
Beneficiário:Leonardo Hadlich de Oliveira
Linha de fomento: Bolsas no Brasil - Mestrado