Journal
CHEMICAL ENGINEERING & TECHNOLOGY
Volume 41, Issue 3, Pages 598-605Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.201700025
Keywords
Biodiesel; Cosolvent; Heterogeneous catalyst; Microreactor; Waste cooking oil
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Biodiesel was prepared from waste cooking oil combined with methanol. The process was performed via transesterification in a microreactor using kettle limescale as a heterogeneous catalyst and various cosolvents under different conditions. n-Hexane and tetrahydrofuran were selected as cosolvents to investigate fatty acid methyl esters (FAMEs). To optimize the reaction conditions, the main parameters affecting FAME% including reaction temperature, catalyst concentration, oil-to-methanol volumetric ratio, and cosolvent-to-methanol volumetric ratio were studied via response surface methodology. Under optimal reaction conditions and in the presence of the cosolvents n-hexane and tetrahydrofuran, high FAME purities were achieved. Considering the experimental results, the limescale catalyst is a unique material, and the cosolvent method can reduce significantly the reaction time and biodiesel production cost.
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