Comparative Study of Acid-Base Homogeneous Catalyst used in Biodiesel Production from Soybean WCO via trans-esterification Reaction

Zaharaddeen M., Geetha. B., Yusuf I.,Sulaiman A.G.,Mujaheed A. Adamu D.M,Misbahu S.A,Abdulrazak M.H., Aliyu G.

Keywords: Biodiesel, Soybean Waste Cooking Oil (WCO), Homogeneous Catalyst, Trans-esterification, Gas Chromatography (GC).


The present study analyses the combination of the two factors which include the determination of the best catalyst to obtained maximum conversion of yield in the production of biodiesel from soybean waste cooking oil and the second factor is to determine the best catalyst giving out maximum characteristics/properties compared to pure diesel using Gas Chromatography analysis. We compare acid/base homogeneous catalysts notably, H2SO4/HCl and NaOH/KOH respectively. Using acid catalysts, there was separation in both the samples of H2SO4 and HCl. The H2S04 gave 87% yield while HCl gave 81% yield with low production of glycerol amount to 10ml and 6ml respectively. The base catalyzed trans-esterification showed that the NaOH and KOH gave 97% and 94% of biodiesel yield and glycerol as byproduct amount to 10ml and 9ml respectively. From the GC analysis, the base catalyze biodiesel (NaOH and KOH) have higher number of peaks containing Hydrocarbons from C10 to C21which are similar to those obtained in a pure diesel.