Highly reactive magnetite covered with islands of carbon: Oxidation of N and S-containing compounds in a biphasic system

Authors:  Iara R. Guimarães, Amanda S. Giroto, Wladmir F. de Souza, Mário C. Guerreiro

Abstract:
In this work a series of magnetite were prepared by impregnating of natural goethite (limonite) with glycerol before thermal treatment under N2 flow at 300, 400 and 500 ◦C. The formation of carbon spots (island) over magnetite was found. The magnetite was found to be the main phase after treatment at 400 and 500 ◦C with high content of Fe2+, which is the active specie in a Fenton like system. Furthermore, iron oxide particles with magnetic and amphiphilic properties were formed, which are interesting for using as a catalyst in refineries. All materials presented high catalytic activities for oxidation of quinoline and dibenzothiophene in a biphasic reaction system (water/toluene).

Keywords:
Limonite
Glycerol
Amphiphilic catalyst
Oxidative process

Published in: Applied catalysis A: General  (Volume 450, Pages 1-274, 15 January 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Highly reactive magnetite covered with islands of carbon: Oxidation of N and S-containing compounds in a biphasic system

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