Please use this identifier to cite or link to this item: http://hdl.handle.net/10174/24174

Title: Waste of biodiesel production: conversion of glycerol into biofuel additives
Authors: Castanheiro, j
Pinto, p
Carlota, S
Editors: Vilarinho, C
Castro, F
Lopes, M
Keywords: Glycerol
Heteropoliacids
Acetalization
Solid acids
Issue Date: Jan-2018
Publisher: Taylor & Francis Group, CRC Press
Citation: S. Carlota, A.P. Pinto, J.E. Castanheiro, “Waste of biodiesel production: conversion of glycerol into biofuel additives”, pp. 167-173, in WASTES: SOLUTIONS, TREATMENTS AND OPPORTUNITIES II, Vilarinho, Castro and Lopes (Eds.), CRC Press- Taylor and Francis Group, London, 2018, ISBN: 978-1-138-19669-8.
Abstract: The condensation of glycerol with acetone was performed using silicotungstic acid (SiW) immobilized in SBA-15, at 70ºC. The main product of glycerol acetalization was solketal. Different techniques were used to characterize the catalysts. A series of catalysts with dif-ferent heteropolyacid loading were prepared. It was observed that the catalytic activity in-creases with the amount of SiW immobilized in SBA-15, being the SiW2@SBA-15 (with 7.8 wt. %) the most active sample. All catalyst exhibited good values of selectivity to sol-ketal (about 99% near complete conversion). To optimize the reaction conditions, the ef-fect of different reaction parameters (catalyst loading, molar ratio of glycerol to acetone and temperature), on the glycerol acetalization over the SiW2@SBA-15 catalyst, was stud-ied. Catalytic stability of the SiW2@SBA-15 was evaluated by performing consecutive batch runs with the same catalyst sample. It was observed that, after the third use, the cata-lytic activity stabilized.
URI: http://hdl.handle.net/10174/24174
ISBN: 978-1-138-19669-8
Type: bookPart
Appears in Collections:ICAAM - Publicações - Capítulos de Livros
QUI - Publicações - Capítulos de Livros
CQE - Publicações - Capítulos de Livros

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