A magnetically separable SO 4 /Fe-Al-TiO 2 solid acid catalyst for biodiesel production from waste cooking oil

Gardy, Jabbar, Osatiashtiani, Amin, Céspedes, Oscar, Hassanpour, Ali, Lai, Xiaojun, Lee, Adam F., Wilson, Karen and Rehan, Mohammad (2018). A magnetically separable SO 4 /Fe-Al-TiO 2 solid acid catalyst for biodiesel production from waste cooking oil. Applied Catalysis B: Environmental ,

Abstract

A novel magnetic SO4/Fe-Al-TiO2 solid acid catalyst was synthesized for biodiesel production via the (trans)esterification of waste cooking oil (WCO). The nanocomposite catalyst was prepared by the sequential functionalisation of commercial rutile/anatase mixed phase TiO2 nanoparticles (NPs) with alumina as a buffer layer, and subsequently hematite to impart magnetic character, prior to sulfation with chlorosulfonic acid to introduce Brønsted acidity. XRD showed that the SO4/Fe-Al-TiO2 catalyst comprised titania (rutile and anatase phases), aluminium sulphate, and hematite nanoparticles, while electron microscopy revealed the layer-by-layer assembly of these components within the SO4/Fe-Al-TiO2 catalyst. FTIR confirmed the presence of surface sulphate groups SO42- and S2O72-/S3O102-, creating a predominantly Brønsted acid catalyst with high acid loading. The catalyst achieved 96 % fatty acid methyl ester (FAME) yield from WCO after 2.5 h of reaction at 90 °C, using 3 wt% of the magnetic catalyst, and a methanol:oil molar ratio of 10:1. SO4/Fe-Al-TiO2 was also effective for feedstocks containing up to 20 wt% of free fatty acid (FFA), and showed excellent stability for WCO (trans)esterification over 10 recycles.

Publication DOI: https://doi.org/10.1016/j.apcatb.2018.04.046
Divisions: Engineering & Applied Sciences
Engineering & Applied Sciences > Chemical engineering & applied chemistry
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: © 2018, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Uncontrolled Keywords: Solid acid catalyst,(trans)esterification,magnetic nanoparticle,biodiesel,waste cooking oil
Full Text Link: http://linkingh ... 926337318303758
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Published Online Date: 2018-04-20
Authors: Gardy, Jabbar
Osatiashtiani, Amin ( 0000-0003-1334-127X)
Céspedes, Oscar
Hassanpour, Ali
Lai, Xiaojun
Lee, Adam F. ( 0000-0002-2153-1391)
Wilson, Karen ( 0000-0003-4873-708X)
Rehan, Mohammad

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