The Influence of Manganese Amount in Oxyhydroxide of Aluminium – Precursor of MnO_x-Al₂O₃ Catalysts on Catalytic Activity in Reaction of Oxidation of C₁-C₃ of Hydrocarbons

Abstract:

The authors have synthesized nanofibrous aluminum oxyhydroxide (AlOOH), modified with different amounts of manganese ions (II), which is the precursor for methane deep oxidation catalysts. It was shown that the catalytic activity of the manganese-based system obtained depends on manganese amount and thermal activation conditions. It is approved that as the catalyst for deep oxidation of hydrocarbons the system with manganese content of 10.5 wt. % is the most perspective despite the fact that the oxidation rate of methane is lower in it than in the catalyst with Mn content of 5.7 wt. %. As opposed to the catalyst with Mn content of 5.7 wt. %., where the aluminium oxide is in metastable form (s-Al₂O₃), the catalyst with manganese content of 10.5 wt. % contains in its structure a thermodynamically and thermally stable α-Al₂O₃ phase.

• Periodical: Key Engineering Materials (Volume 670)
• Pages: 27-32
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.670.27
• Online since: October 2015
• Authors: Olga I. Sidorova*, Sergey Galanov, Elena N. Gryaznova, Ludmila N. Shiyan
• Keywords: Manganese-Containing Catalytic Systems, Reaction of Deep Oxidation of Hydrocarbons

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