caa a22 4500 606170480 CHVBK 20210128100717.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10098-015-0925-x doi (NATIONALLICENCE)springer-10.1007/s10098-015-0925-x Robust kinetic modeling of heterogeneously catalyzed free fatty acids esterification in monophasic liquid/solid packed bed reactor: rival model discrimination [Elektronische Daten] [Carlo Pirola, Federico Galli, Michele Corbetta, Flavio Manenti] Biodiesel production could be economically sustainable if raw oils, i.e., waste cooking oil or oils with a high acid content, are used for its production. However, the high content of free fatty acid (FFA) of these oils makes necessary a pretreatment before the transesterification step. Esterification using methanol and a heterogeneous catalyst should be very convenient because this reaction permits to decrease FFA content by producing simultaneously methyl esters, i.e., biodiesel. This technology was applied in a continuous packed bed reactor for the deacidification of sunflower oil, using Amberlyst 46 as heterogeneous acid catalyst at pressure of 6bar and temperature in the range of 54-95°C. An amount of methanol five times greater than the stoichiometric was added to sunflower oil, in order to shift the reaction equilibrium but avoiding the formation of a double liquid phase. Two different kinetic models were considered: a pseudo-homogeneous and an adsorption based, which accounts for the different affinities toward the polymeric matrix of all the species involved in the reaction and the solvent (triglycerides). For both the models, either the ideal or non-ideal behavior of the mixture was considered, and the results were compared. The kinetic parameters of the esterification of free fatty acid were regressed using a robust mathematical model and using equilibrated resins, i.e., all the experiments started only after having let the catalyst adsorb reactants and products at the operative conditions. Springer-Verlag Berlin Heidelberg, 2015 Biodiesel nationallicence FFA deacidification nationallicence Kinetic model nationallicence Adsorption nationallicence UNIQUAC nationallicence Pirola Carlo Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133, Milan, Italy aut Galli Federico Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133, Milan, Italy aut Corbetta Michele Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta”, Politecnico di Milano, piazza Leonardo da Vinci 32, 20133, Milan, Italy aut Manenti Flavio Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta”, Politecnico di Milano, piazza Leonardo da Vinci 32, 20133, Milan, Italy aut Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/5(2015-06-01), 1139-1147 1618-954X 17:5<1139 2015 17 10098 https://doi.org/10.1007/s10098-015-0925-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10098-015-0925-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pirola Carlo Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133, Milan, Italy aut NATIONALLICENCE 700 1- Galli Federico Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133, Milan, Italy aut NATIONALLICENCE 700 1- Corbetta Michele Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta”, Politecnico di Milano, piazza Leonardo da Vinci 32, 20133, Milan, Italy aut NATIONALLICENCE 700 1- Manenti Flavio Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta”, Politecnico di Milano, piazza Leonardo da Vinci 32, 20133, Milan, Italy aut NATIONALLICENCE 773 0- Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/5(2015-06-01), 1139-1147 1618-954X 17:5<1139 2015 17 10098