Production and Characterization of Biodiesel from Jatropha curcas Seed Oil by Using Fly Ash as a Catalyst - Tinsu Gebreyohans Desta; Gebresilasie Gebremedhin Gebresilasie; Gidet Godif Meressa; Solomon kahsay Abraha; Mengstiab Weldemhret Weldeslassie; Kedir Yesuf Abdu; Yassin Adem Endris; Mudasir Akbar Shah (ACS Omega)