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

Eric C. Njagi, Homer C. Genuino, Cecil K. King'ondu, Saminda Dharmarathna, Steven L. Suib

Research output: Contribution to journalArticle

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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 °C with space velocity of 35 000 mL/hg 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 m2 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.
Original languageEnglish
Pages (from-to)154-160
Number of pages7
JournalApplied Catalysis A: General
Volume421
DOIs
Publication statusPublished - 2012

Fingerprint

Manganese oxide
Catalytic oxidation
Copper
Ethylene
Catalyst activity
Temperature
Catalysts
Temperature programmed desorption
Oxides
X ray photoelectron spectroscopy
Porosity
Oxygen
Transmission electron microscopy
Oxidation
Scanning electron microscopy
manganese oxide
ethylene

Cite this

Njagi, Eric C. ; Genuino, Homer C. ; King'ondu, Cecil K. ; Dharmarathna, Saminda ; Suib, Steven L. / Catalytic oxidation of ethylene at low temperatures using porous copper manganese oxides. In: Applied Catalysis A: General. 2012 ; Vol. 421. pp. 154-160.
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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 °C with space velocity of 35 000 mL/hg 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 m2 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.",
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Catalytic oxidation of ethylene at low temperatures using porous copper manganese oxides. / Njagi, Eric C.; Genuino, Homer C.; King'ondu, Cecil K.; Dharmarathna, Saminda; Suib, Steven L.

In: Applied Catalysis A: General, Vol. 421, 2012, p. 154-160.

Research output: Contribution to journalArticle

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T1 - Catalytic oxidation of ethylene at low temperatures using porous copper manganese oxides

AU - Njagi, Eric C.

AU - Genuino, Homer C.

AU - King'ondu, Cecil K.

AU - Dharmarathna, Saminda

AU - Suib, Steven L.

PY - 2012

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AB - 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 °C with space velocity of 35 000 mL/hg 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 m2 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.

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