An advanced MC-type oxidation process - The role of carbon dioxide

Jin S. Yoo; Sung Hwa Jhung; Ki Hwa Lee; Youn Seok Park

doi:10.1016/S0926-860X(01)00763-3

An advanced MC-type oxidation process - The role of carbon dioxide

Jin S. Yoo, Sung Hwa Jhung, Ki Hwa Lee, Youn Seok Park

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

The MC-type O₂ oxidation of xylenes to the corresponding dicarboxylic acids with Co/Mn/HBr in the liquid phase was remarkably improved in the co-presence of carbon dioxide in O₂ feed stream. This striking phenomenon became even more prominent when the catalyst was modified with an alkali/transition metal additive. A synergistic interaction of CO₂ and O₂ molecules generated an active cyclic peroxocarbonate complex. This complex appears to play a key role in promoting hydrogen abstraction, which has been reported to be the rate-determining step for the kinetic oxidation pathway. In short, the introduction of CO₂ into the O₂ feed stream brought about an advanced oxidation process, which resulted in an increase in the yield and selectivity towards the acid product, a reduction of partially oxidized intermediates, and an enhancement of the product quality over the conventional MC-type O₂ oxidation process.

Original language	English
Pages (from-to)	239-251
Number of pages	13
Journal	Applied Catalysis A: General
Volume	223
Issue number	1-2
DOIs	https://doi.org/10.1016/S0926-860X(01)00763-3
State	Published - 2002

Keywords

Carbon dioxide
MC-type oxidation
Peroxocarbonate

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10.1016/S0926-860X(01)00763-3

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title = "An advanced MC-type oxidation process - The role of carbon dioxide",

abstract = "The MC-type O2 oxidation of xylenes to the corresponding dicarboxylic acids with Co/Mn/HBr in the liquid phase was remarkably improved in the co-presence of carbon dioxide in O2 feed stream. This striking phenomenon became even more prominent when the catalyst was modified with an alkali/transition metal additive. A synergistic interaction of CO2 and O2 molecules generated an active cyclic peroxocarbonate complex. This complex appears to play a key role in promoting hydrogen abstraction, which has been reported to be the rate-determining step for the kinetic oxidation pathway. In short, the introduction of CO2 into the O2 feed stream brought about an advanced oxidation process, which resulted in an increase in the yield and selectivity towards the acid product, a reduction of partially oxidized intermediates, and an enhancement of the product quality over the conventional MC-type O2 oxidation process.",

keywords = "Carbon dioxide, MC-type oxidation, Peroxocarbonate",

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TY - JOUR

T1 - An advanced MC-type oxidation process - The role of carbon dioxide

AU - Yoo, Jin S.

AU - Jhung, Sung Hwa

AU - Lee, Ki Hwa

AU - Park, Youn Seok

PY - 2002

Y1 - 2002

N2 - The MC-type O2 oxidation of xylenes to the corresponding dicarboxylic acids with Co/Mn/HBr in the liquid phase was remarkably improved in the co-presence of carbon dioxide in O2 feed stream. This striking phenomenon became even more prominent when the catalyst was modified with an alkali/transition metal additive. A synergistic interaction of CO2 and O2 molecules generated an active cyclic peroxocarbonate complex. This complex appears to play a key role in promoting hydrogen abstraction, which has been reported to be the rate-determining step for the kinetic oxidation pathway. In short, the introduction of CO2 into the O2 feed stream brought about an advanced oxidation process, which resulted in an increase in the yield and selectivity towards the acid product, a reduction of partially oxidized intermediates, and an enhancement of the product quality over the conventional MC-type O2 oxidation process.

AB - The MC-type O2 oxidation of xylenes to the corresponding dicarboxylic acids with Co/Mn/HBr in the liquid phase was remarkably improved in the co-presence of carbon dioxide in O2 feed stream. This striking phenomenon became even more prominent when the catalyst was modified with an alkali/transition metal additive. A synergistic interaction of CO2 and O2 molecules generated an active cyclic peroxocarbonate complex. This complex appears to play a key role in promoting hydrogen abstraction, which has been reported to be the rate-determining step for the kinetic oxidation pathway. In short, the introduction of CO2 into the O2 feed stream brought about an advanced oxidation process, which resulted in an increase in the yield and selectivity towards the acid product, a reduction of partially oxidized intermediates, and an enhancement of the product quality over the conventional MC-type O2 oxidation process.

KW - Carbon dioxide

KW - MC-type oxidation

KW - Peroxocarbonate

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U2 - 10.1016/S0926-860X(01)00763-3

DO - 10.1016/S0926-860X(01)00763-3

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JO - Applied Catalysis A: General

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ER -

An advanced MC-type oxidation process - The role of carbon dioxide

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Keywords

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