Ali Teymoori - Bsc student, university of Zanjan.
Esmaeil Farmani - Msc student, university of Tehran
Mahmoud Torabi angji - Faculty of rngineering, university of Tehran

Biofuel process is very similar to refining system. What’s more some edges which make this process stand out is no threat for environment. Because of the similarity between bio- oil process and refining processes it’s been obtained we can upgrade refineries by this processes. Other conditions can play key roles in this modes such as catalyst, temperature, pressure and etc…. in this paper influences of these factors have been studied. Also basic investments have been investigated.