Physical-chemical properties of waste cooking oil biodiesel and castor oil biodiesel blends

José Ricardo Sodré, Osmano Souza Valente, Vanya Márcia Duarte Pasa, Carlos Rodrigues Pereira Belchior

Research output: Contribution to journalArticlepeer-review


This work presents the physical-chemical properties of fuel blends of waste cooking oil biodiesel or castor oil biodiesel with diesel oil. The properties evaluated were fuel density, kinematic viscosity, cetane index, distillation temperatures, and sulfur content, measured according to standard test methods. The results were analyzed based on present specifications for biodiesel fuel in Brazil, Europe, and USA. Fuel density and viscosity were increased with increasing biodiesel concentration, while fuel sulfur content was reduced. Cetane index is decreased with high biodiesel content in diesel oil. The biodiesel blends distillation temperatures T10 and T50 are higher than those of diesel oil, while the distillation temperature T 90 is lower. A brief discussion on the possible effects of fuel property variation with biodiesel concentration on engine performance and exhaust emissions is presented. The maximum biodiesel concentration in diesel oil that meets the required characteristics for internal combustion engine application is evaluated, based on the results obtained.

Original languageEnglish
Pages (from-to)1700-1702
Number of pages3
Issue number4
Publication statusPublished - 1 Jan 2011

Bibliographical note

© 2010 Elsevier Ltd. Open access under the Elsevier OA license


  • Biodiesel
  • Biofuels
  • Castor oil
  • Properties
  • Waste cooking oil


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