Catalytic oxidative coupling of methane over sodium-promoted Mn/SiO2 and Mn/MgO

J. A. Sofranko; J. J. Leonard; C. A. Jones; A. M. Gaffney; H. P. Withers

doi:10.1016/0920-5861(88)87003-2

Catalytic oxidative coupling of methane over sodium-promoted Mn/SiO₂ and Mn/MgO

J. A. Sofranko
, J. J. Leonard
, C. A. Jones
, A. M. Gaffney
, H. P. Withers

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

85 Scopus citations

Abstract

Oxidative coupling of methane over sodium-promoted manganese-silica and manganese-magnesia was carried out catalytically with a methane-air cofeed. A catalyst of 12.5% sodium permanganate on magnesia gave a 15.7% yield of ethane, ethylene and higher hydrocarbons at 925°C, 9600 GHSV and 50% air in methane. Methane conversion and selectivity to C₂⁺ hydrocarbons was 22-25% and 65-70%, respectively. A Mars-van Krevelen type mechanism is proposed in which methyl radicals are formed at surface metal oxide sites. The methyl radicals subsequently dimerize or react with other hydrocarbons in the gas phase.

Original language	English
Pages (from-to)	127-135
Number of pages	9
Journal	Catalysis Today
Volume	3
Issue number	2-3
DOIs	https://doi.org/10.1016/0920-5861(88)87003-2
State	Published - Jun 1988
Externally published	Yes

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10.1016/0920-5861(88)87003-2

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@article{48cdcb81e5d9464a96651ce89c518f4c,

title = "Catalytic oxidative coupling of methane over sodium-promoted Mn/SiO2 and Mn/MgO",

abstract = "Oxidative coupling of methane over sodium-promoted manganese-silica and manganese-magnesia was carried out catalytically with a methane-air cofeed. A catalyst of 12.5\% sodium permanganate on magnesia gave a 15.7\% yield of ethane, ethylene and higher hydrocarbons at 925°C, 9600 GHSV and 50\% air in methane. Methane conversion and selectivity to C2+ hydrocarbons was 22-25\% and 65-70\%, respectively. A Mars-van Krevelen type mechanism is proposed in which methyl radicals are formed at surface metal oxide sites. The methyl radicals subsequently dimerize or react with other hydrocarbons in the gas phase.",

author = "Sofranko, \{J. A.\} and Leonard, \{J. J.\} and Jones, \{C. A.\} and Gaffney, \{A. M.\} and Withers, \{H. P.\}",

year = "1988",

month = jun,

doi = "10.1016/0920-5861(88)87003-2",

language = "English",

volume = "3",

pages = "127--135",

journal = "Catalysis Today",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Catalytic oxidative coupling of methane over sodium-promoted Mn/SiO2 and Mn/MgO

AU - Sofranko, J. A.

AU - Leonard, J. J.

AU - Jones, C. A.

AU - Gaffney, A. M.

AU - Withers, H. P.

PY - 1988/6

Y1 - 1988/6

N2 - Oxidative coupling of methane over sodium-promoted manganese-silica and manganese-magnesia was carried out catalytically with a methane-air cofeed. A catalyst of 12.5% sodium permanganate on magnesia gave a 15.7% yield of ethane, ethylene and higher hydrocarbons at 925°C, 9600 GHSV and 50% air in methane. Methane conversion and selectivity to C2+ hydrocarbons was 22-25% and 65-70%, respectively. A Mars-van Krevelen type mechanism is proposed in which methyl radicals are formed at surface metal oxide sites. The methyl radicals subsequently dimerize or react with other hydrocarbons in the gas phase.

AB - Oxidative coupling of methane over sodium-promoted manganese-silica and manganese-magnesia was carried out catalytically with a methane-air cofeed. A catalyst of 12.5% sodium permanganate on magnesia gave a 15.7% yield of ethane, ethylene and higher hydrocarbons at 925°C, 9600 GHSV and 50% air in methane. Methane conversion and selectivity to C2+ hydrocarbons was 22-25% and 65-70%, respectively. A Mars-van Krevelen type mechanism is proposed in which methyl radicals are formed at surface metal oxide sites. The methyl radicals subsequently dimerize or react with other hydrocarbons in the gas phase.

UR - https://www.scopus.com/pages/publications/0000086843

U2 - 10.1016/0920-5861(88)87003-2

DO - 10.1016/0920-5861(88)87003-2

M3 - Article

AN - SCOPUS:0000086843

SN - 0920-5861

VL - 3

SP - 127

EP - 135

JO - Catalysis Today

JF - Catalysis Today

IS - 2-3

ER -

Catalytic oxidative coupling of methane over sodium-promoted Mn/SiO₂ and Mn/MgO

Abstract

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