Predicting the viscosity of biodiesel fuels based on the mixture topological index method

Abstract To predict the viscosity of any given biodiesel fuel (FAME mixture), a novel topological index based on the distance matrix and adjacent matrix of the molecular structure is proposed. The new topological index can reflect the information of the molecular structure for fatty acid methyl ester (FAME), such as the size of molecular, unsaturated bond and branch degree. Combined with the modified Grunberg–Nissan or Hind equation, the topological index values of the FAME mixture were calculated. Then, relates the topological index values of the FAME mixtures with the viscosities of them, two linear regression equations were obtained. Using these regression equations, the viscosity of biodiesel fuels were predicted. The results show the modified Grunberg–Nissan equation with a higher precision of prediction than the Hind equation regression equation.

[1]  H. Masjuki,et al.  Biodiesel from palmoil—an analysis of its properties and potential , 2002 .

[2]  P. Luckham,et al.  An assessment of a rolling-ball viscometer for studying non-Newtonian fluids , 1992 .

[3]  L. G. Schumacher,et al.  Impact of cold flow improvers on soybean biodiesel blend , 2004 .

[4]  A. Madan,et al.  Models for the prediction of adenosine receptors binding activity of 4-amino[1,2,4]triazolo[4,3-a]quinoxalines , 2004 .

[5]  M. Pegg,et al.  Predicting the viscosity of biodiesel fuels from their fatty acid ester composition , 1999 .

[6]  Zéphirin Mouloungui,et al.  Relationships between structure and lubricating properties of neopentylpolyol esters , 1998 .

[7]  A. Villares,et al.  Experimental and Predicted Viscosities of the Ternary Mixture (Hexane + 1,3-Dioxolane + 2-Butanol) at 298.15 and 313.15 K , 2005 .

[8]  J. P. J. Pablo,et al.  Predictive Molecular Model for the Thermodynamic and Transport Properties of Triacylglycerols , 2003 .

[9]  G. Vicente,et al.  A Comparative Study of Vegetable Oils for Biodiesel Production in Spain , 2006 .

[10]  Cecil A. W. Allen.  Prediction of biodiesel fuel atomization characteristics based on measured properties. , 1998 .

[11]  S. Jayaraj,et al.  Performance and emission evaluation of a diesel engine fueled with methyl esters of rubber seed oil , 2005 .

[12]  A. Rodríguez,et al.  Dynamic Viscosity and Speed of Sound of the Ternary Mixture Methyl Acetate + Methanol + Ethanol at 298.15 K , 1998 .

[13]  J. V. Gerpen,et al.  The effect of biodiesel oxidation on engine performance and emissions , 2001 .

[14]  Jianbo Hu,et al.  Study on the lubrication properties of biodiesel as fuel lubricity enhancers , 2005 .

[15]  Ghassan Tashtoush,et al.  Experimental study on evaluation and optimization of conversion of waste animal fat into biodiesel. , 2004 .