roni, kiagus. 2021. “The Effect of Catalyst Amount &Amp; Reacters Comperative on Glycerol Conversion From Castrol Oil With Catalyst Of Pertamina Cracking Process Unit III Palembang”. Jurnal Tekno 18 (2):71-80. https://doi.org/10.33557/jtekno.v18i2.1451.