Optimization and kinetic modeling of waste lard methanolysis in a continuous reciprocating plate reactor

• Published in: Chinese journal of chemical engineering Vol. 27; no. 10; pp. 2481 - 2490
• Main Authors: Miladinović, Marija R., Stojković, Ivan J., Veličković, Ana V., Stamenković, Olivera S., Banković-Ilić, Ivana B., Veljković, Vlada B.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-10-2019; University of Ni?, Faculty of Technology, Bulevar oslobo?enja 124, Leskovac 16000, Serbia%University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, Belgrade 11000, Serbia%University of Ni?, Faculty of Technology, Bulevar oslobo?enja 124, Leskovac 16000, Serbia; Serbian Academy of Sciences and Arts (SASA), Knez Mihailova 35, Belgrade 11000, Serbia
• Subjects: Biodiesel; Kinetics; Optimization; Reciprocating plate reactor; Waste lard; Waste lard; Reciprocating plate reactor; Kinetics; Biodiesel; Optimization
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/j.cjche.2019.02.019

Continuous biodiesel production from a waste pig-roasting lard, methanol and KOH was carried out in a reciprocating plate reactor (RPR) using a factorial design containing three process factors, namely methanol/lard molar ratio, catalyst loading, and normalized height of the reactor. The main goals were to optimize the influential process factors with respect to biodiesel purity using the response surface methodology and to model the kinetics of the transesterification reaction in order to describe the change of triacylglycerols (TAG) and fatty acid methyl esters (FAME) concentrations along the RPR height. The first-order rate law was proved for both the reaction and the mass transfer. The model of the changing reaction mechanism and mass transfer of TAG was also applicable. Both kinetic models agreed with the experimental concentrations of TAG and FAME determined along the RPR height.