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Esterification of Acidic Oils over a Versatile Amorphous Solid Catalyst



An amorphous SiO2–ZrO2catalyst shows high activity in the esterification of free fatty acids contained in vegetable oils while at the same time promoting the transesterification of triglycerides. The catalyst is hence a good candidate for a low-waste deacidification pretreatment or for a one-pot biodiesel production process starting from oils with a high acid content.

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