Semi-continuous mechanochemical process for biodiesel production under heterogeneous catalysis using calcium diglyceroxide

Irene Malpartida, Pedro Maireles-Torres, Carlos Vereda, José M. Rodríguez-Maroto, Samy Halloumi, Valentin Lair, Julien Thiel and François Lacoste

Renewable Energy, 2020, vol. 159, issue C, 117-126

Abstract: This work is aimed at the development of a semi-continuous mechanochemical process for biodiesel production and the subsequent valorization of glycerol, its by-product, via its conversion into calcium diglyceroxide using the same mechanochemical reactor. This basic solid catalyzes the methanolysis of vegetable oils. The implementation of a semi-continuous process allows both the preparation of the solid catalyst and the methanolysis process, overcoming the miscibility problems of methanol and oil. Thus, a biodiesel yield higher than 90% is reached using a methanol:oil molar ratio close to stoichiometric value and 1.5 wt. % catalyst, after passing through the reactor with a flow rate between 4 and 45 L/h. This new process for biodiesel production can easily be scaled up and applied to the conversion of used cooking oils, without any significant yield decrease. A cost study was also performed, demonstrating that this is more economical than the conventional batch stirring-based process.

Keywords: Calcium diglyceroxide; Biodiesel; Heterogeneous catalysis; Mechanochemistry; Continuous flow; Mechanochemical process (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:159:y:2020:i:c:p:117-126

DOI: 10.1016/j.renene.2020.05.020

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