Total oxidation of naphthalene using bulk manganese oxide catalysts

Authors: Tomas Garcia, David Sellick, Francisco Varela, Isabel Vázquez, Ana Dejoz, Said Agouram, Stuart H. Taylor, Benjamin Solsona

Abstract:
Several Mn₂O₃ catalysts have been synthesized using different preparation methods and tested for the total oxidation of naphthalene, a model polycyclic aromatic compound. The catalysts have been characterized by several physico-chemical techniques such as XRD, TPR, XPS, EDX and TEM. The surface area of the catalyst seems to be of paramount importance, since the mass normalized activity of catalysts increases as the surface area of the Mn₂O₃ catalysts increases. Consequently, a high surface area ordered mesoporous Mn₂O₃ catalyst, obtained through a nanocasting route using mesoporous KIT-6 silica as a hard template, was the most efficient catalyst for the deep oxidation of naphthalene. In addition, this catalyst also exerts the highest surface area normalized catalytic activity, which can be related to the highest reducibility and mobility of its lattice oxygen. It was also observed that the Mn₂O₃ crystalline phase presents a higher intrinsic activity than MnO₂.

Keywords:
Naphthalene
Polycyclic aromatic compound
PAH
Manganese oxide
Total oxidation
Nanocasting

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

Publisher: Elsevier

ISSN Information: 0926-860X

Total oxidation of naphthalene using bulk manganese oxide catalysts

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