Catalytic oxidation of ethylene at low temperatures using porous copper manganese oxides

Journal article

Authors / Editors

King'ondu, Cecil

Research Areas

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Publication Details

Author list: Njagi EC, Genuino HC, King'ondu CK, Dharmarathna S, Suib SL

Publisher: Elsevier

Place: AMSTERDAM

Publication year: 2012

Journal: Applied Catalysis A: General (0926-860X)

Journal acronym: APPL CATAL A-GEN

Volume number: 421

Start page: 154

End page: 160

Number of pages: 7

ISSN: 0926-860X

eISSN: 1873-3875

Languages: English-Great Britain (EN-GB)

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Abstract

Amorphous manganese oxide and binary copper manganese oxides were synthesized using the redox method, characterized, and tested in the catalytic oxidation of ethylene. The catalytic activity of the synthesized catalysts toward ethylene oxidation was high (100% conversion of 1.0% C2H4 at 200 degrees C with space velocity of 35. 000 mL h(-1) g(cat)(-1)) and compared favorably with that of a commercial Hopcalite catalyst. The high catalytic activity was attributed a combination of factors including the poor crystallinity, the high surface areas (>= 163 m(2) g(-1)), porosity, presence of Mn4+ species, and compositional homogeneity of the synthesized copper manganese oxides. Incorporation of copper into the amorphous manganese oxide matrix significantly enhanced the catalytic activity of the resultant bimetallic oxides by increasing the reducibility and ease of removal of lattice oxygen species. The synthesized materials were characterized using FE-SEM, HR-TEM, BET, FAAS, XPS, and TPD methods. (C) 2012 Elsevier B.V. All rights reserved.

Keywords

Catalytic oxidation, Copper manganese oxide, Ethylene, Volatile organic compounds (VOCs)

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