The continuous-flow transesterification of soybean oil with methanol using a rotating packed bed
(RPB) for the production of fatty acid methyl esters (biodiesel) is presented herein. The RPB, which
provides high centrifugal force and has an adjustable rotational speed, is employed as a novel transesterification
reactor. In this study, biodiesel is synthesized via the methanolysis of soybean oil using
potassium hydroxide as the catalyst. The following variables were investigated for their effects on
transesterification efficiency: the methanol–oil molar ratio, the estimated hydraulic retention time,
the rotational speed of the packed-bed rotator, the reaction temperature, and the catalyst dosage.
The yield of the fatty acid methyl esters (YFAME) in the RPB system depends significantly on the experimental
conditions, which influence the residence time distribution, the transesterification reaction
rate, and the micromixing intensity. Due to its excellent micromixing characteristics, the RPB system
shows satisfactory transesterification efficiency. The values of YFAME, productivity of FAMEs (PFAME),
and PFAME per unit reactor volume (PFAME/VR) in the RPB are used to evaluate the performance for biodiesel
production and allow for further comparison with other continuous transesterification reactors.
Consequently, a RPB is considered a practical transesterification reactor with high transesterification
efficiency.
The continuous-flow transesterification of soybean oil with methanol using a rotating packed bed(RPB) for the production of fatty acid methyl esters (biodiesel) is presented herein. The RPB, whichprovides high centrifugal force and has an adjustable rotational speed, is employed as a novel transesterificationreactor. In this study, biodiesel is synthesized via the methanolysis of soybean oil usingpotassium hydroxide as the catalyst. The following variables were investigated for their effects ontransesterification efficiency: the methanol–oil molar ratio, the estimated hydraulic retention time,the rotational speed of the packed-bed rotator, the reaction temperature, and the catalyst dosage.The yield of the fatty acid methyl esters (YFAME) in the RPB system depends significantly on the experimentalconditions, which influence the residence time distribution, the transesterification reactionrate, and the micromixing intensity. Due to its excellent micromixing characteristics, the RPB systemshows satisfactory transesterification efficiency. The values of YFAME, productivity of FAMEs (PFAME),and PFAME per unit reactor volume (PFAME/VR) in the RPB are used to evaluate the performance for biodieselproduction and allow for further comparison with other continuous transesterification reactors.Consequently, a RPB is considered a practical transesterification reactor with high transesterificationefficiency.
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