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

doi:10.1016/j.apcata.2012.02.011

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 journal › Article › peer-review

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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 language	English
Pages (from-to)	154-160
Number of pages	7
Journal	Applied Catalysis A: General
Volume	421
DOIs	https://doi.org/10.1016/j.apcata.2012.02.011
Publication status	Published - 2012

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title = "Catalytic oxidation of ethylene at low temperatures using porous copper manganese oxides",

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.",

author = "Njagi, {Eric C.} and Genuino, {Homer C.} and King'ondu, {Cecil K.} and Saminda Dharmarathna and Suib, {Steven L.}",

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doi = "10.1016/j.apcata.2012.02.011",

language = "English",

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journal = "Applied Catalysis A: General",

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TY - JOUR

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

Y1 - 2012

N2 - 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.

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.

U2 - 10.1016/j.apcata.2012.02.011

DO - 10.1016/j.apcata.2012.02.011

M3 - Article

SN - 0926-860X

VL - 421

SP - 154

EP - 160

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

ER -

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

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