The reaction kinetics model of transesterification of canola oil to biodiesel catalyzed by nanopowder calcium oxide was expressed.The reaction mechanism based on Langmuir-hinshelwood model has been proposed. In this proposed mechanism the overall reaction rate is assumed to be controlled by triglyceride adsorption step in the initial period followed by chemical reaction-controlled period. The apparent reaction constants, apparent activation energy and pre-exponential factors for both periods have been calculated based on experimental data. The internal mass transfer does not limit the reaction due to the nanosize of the catalyst particle.
