A new method for tieline calculations in binary fluid systems

Haseeb A., KESKİN M., Pegg I., Meijer P.

FLUID PHASE EQUILIBRIA, cilt.120, ss.93-105, 1996 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 120
  • Basım Tarihi: 1996
  • Doi Numarası: 10.1016/0378-3812(95)02978-8
  • Dergi Adı: FLUID PHASE EQUILIBRIA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.93-105
  • Erciyes Üniversitesi Adresli: Evet

Özet

We describe a method to determine tielines for a mixture with a given volume V-t and a given mole fraction x(t) at fixed temperature, which is based on the orientation of the tangent plane to the Helmholtz free energy surface. The method works equally well for gas-liquid separation as for liquid-liquid separation. The method is based on a rotation in coordinate space followed by a rotation in function space which establishes the correct direction and the end points of the tieline, The mathematics is described and the general outline of a computer program to implement the method is given, This is followed by an application to a special form of the van der Waals equation, which describes the influence of chain-molecules as proposed by Tompa. The example given shows a three phase separation and the influence of the chain-length thereupon.