Optimization of operational and design parameters of a Simultaneous Mixer-Separator for enhanced continuous biodiesel production

Abstract

Abstract Nowadays, biodiesel is promoted as an alternative and renewable fuel. The mass-transfer limited transesterification reaction is commonly used for biodiesel production, but it could benefit from process intensification technologies. The Simultaneous Mixer-Separator (SMS) is a novel process intensification reactor capable of integrating the mixing and separation of reactants within a single unit. The current study aims to determine the ideal parameters for continuous biodiesel production using an SMS setup that was exclusively designed and fabricated in-home for enhanced biodiesel production. The research statistically analyzed the effect of the space between the rotor and the bottom of reactor (h) (0.7, 1.0, 1.3 cm), the diameter ratio between the rotor and the stator (Dr/Ds) (0.5, 0.7, 0.9), and the frequency of the rotor’s rotary speed (R f ) (20, 40, 60 Hz) on biodiesel yield using the Response Surface Methodology (RSM). Optimal oil to fatty acid methyl ester(FAME) conversion of 93.2% and the optimal volumetric production rate of 1,980 (kg FAME/m3·h) were obtained by setting the SMS to a rotational frequency of 39 Hz, an h of 0.7 cm, and a D r /D s of 0.85.