r Ghanei - Chemical Engineering Department, Engineering Faculty, IAU-Farahan branch, Farahan, Iran
g.r Moradi - Chemical Engineering Department, Engineering Faculty, IAU-Farahan branch, Farahan, Iran
a Heydarinasab - Chemical Engineering Department, Engineering Faculty, IAU-Farahan branch, Farahan, Iran

In recent years, increasing energy demand and decreasing fossil fuel sources, encourage researchers to investigate on new energy supply, especially renewable energy. Biodiesel, as an alternative for traditional diesel fuel has attracted attention of many nations. It can be producedeasily, via methanolysis of vegetable oil in presence of appropriate catalyst. In present study, to evaluate constructive lime as catalyst and determine the appropriate pretreatment temperature, transesterification of canola oil in different pretreatment temperature and uniform operatingcondition were done. Operational conditions were as follows: atmospheric pressure; weight of catalyst: 1% based on initial oil weight; methanol/oil molar ratio: 12; reaction temperature, 65ºC; under vigorous mixing and reaction time was 5 hr. At these conditions, when activation temperature was 600°C, 91.16% conversion was obtained. For this product, dynamic viscosity and specific gravity of produced biodiesel were 4.4 cP and 0.882, respectively. Increasing in activation temperature did not change the conversion, much. When pretreatment temperature was lesser than600°C, the results were not acceptable

Biodiesel, lime, canola, pretreatment temperature, heterogeneous catalyst