Excess molar volumes, viscosity, refractive index, and Gibbs energy of activation of binary biodiesel plus benzene, and biodiesel plus toluene mixtures at 298.15 and 303.15 K


Vural U. S. , DURMAZ F., KOÇYİĞİT Ö., Kocyigit H., Muradoglu V., AKIN B.

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A, cilt.82, sa.13, ss.2260-2268, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 82 Konu: 13
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1134/s0036024408130189
  • Dergi Adı: RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
  • Sayfa Sayıları: ss.2260-2268

Özet

Excess molar volumes (VE ), viscosities, refractive index, and Gibbs energies were evaluated for binary biodiesel + benzene and toluene mixtures at 298.15 and 303.15 K. The excess molar volumes VE were determined from density, while the excess Gibbs free energy of activation G*Ewas calculated from viscosity deviation Delta eta. The excess molar volume (V E), viscosity deviation (Delta eta), and excess Gibbs energy of activation (G*E) were fitted to the Redlich-Kister polynomial equation to derive binary coefficients and estimate the standard deviations between the experimental data and calculation results. All mixtures showed positive V E values obviously caused by increased physical interactions between biodiesel and the organic solvents.