CATALYTIC OXIDATIVE COUPLING OF METHANE OVER SODIUM-PROMOTED MANGANESE OXIDE ON SILICA AND MAGNESIA

JA Sofranko; JJ Leonard; CA Jones; AM Gaffney

CATALYTIC OXIDATIVE COUPLING OF METHANE OVER SODIUM-PROMOTED MANGANESE OXIDE ON SILICA AND MAGNESIA

JA Sofranko
, JJ Leonard
, CA Jones
, AM Gaffney

Idaho National Laboratory

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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
Title of host publication	Abstracts of Papers of the American Chemical Society
Pages	28-PETR
Volume	194
State	Published - Jun 1 1988

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@inproceedings{093c870e2e30422cb560c69006dc23e9,

title = "CATALYTIC OXIDATIVE COUPLING OF METHANE OVER SODIUM-PROMOTED MANGANESE OXIDE ON SILICA AND MAGNESIA",

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 = "JA Sofranko and JJ Leonard and CA Jones and AM Gaffney",

year = "1988",

month = jun,

day = "1",

language = "English",

volume = "194",

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T1 - CATALYTIC OXIDATIVE COUPLING OF METHANE OVER SODIUM-PROMOTED MANGANESE OXIDE ON SILICA AND MAGNESIA

AU - Sofranko, JA

AU - Leonard, JJ

AU - Jones, CA

AU - Gaffney, AM

PY - 1988/6/1

Y1 - 1988/6/1

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.

M3 - Conference contribution

VL - 194

SP - 28-PETR

BT - Abstracts of Papers of the American Chemical Society

ER -

CATALYTIC OXIDATIVE COUPLING OF METHANE OVER SODIUM-PROMOTED MANGANESE OXIDE ON SILICA AND MAGNESIA

Abstract

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