Optimization processes of biodiesel production from pig and neem (Azadirachta indica a.Juss) seeds blend oil using alternative catalysts from waste biomass
This study tested the suitability of solid residue (CaO) derived from the mixture of wastes biomass as based catalyst transesterification conversion of the blend of neem oilseed (Azadirachta indica A.Juss) with rendered pig fat. Blending was done in the ratio of Neem oil: Pig fat oil (v/v) as 10:90 (NO10),20:80 (NO20),30:70 (NO30), 40:60 (NO40), 50:50 (NO50), 60:40 (NO60), 70:30 (NO70), 80:20 (NO80), and 90:10 (NO90), respectively. Process parameter transesterification optimization of methanolysis CaO catalyst for synthesis of 60:40 to mixed oil biodiesel (MOB) was investigated using central composite design that generates thirty experimental runs and were carried out.
Results showed low viscous oil at blend of 60:40. The predicted MOB yield of 98.05 (wt. %) at catalyst amount of 2.179 (g), reaction time of 57.45 min, reaction temperature of 59.91 °C, and MeOH/OMR of 5.9:1 (ml/ml), was validated in triplicate, and an average MOB yield of 98.03 (wt. %) was obtained. Results of XRD analysis indicated CaO as the predominant constituent element obtained from the mixture of calcined palm kernel shell husk (CPKSH) and calcined fermented kola nut husk (CFKNH). The qualities of MOB produced were within the biodiesel standard.