on the reaction mechanism for methane partial oxidation over yttria/zirconia

A.G. Steghuis; A.G. Steghuis; J.G. van Ommen; J.A. Lercher

doi:10.1016/S0920-5861(98)00330-7

on the reaction mechanism for methane partial oxidation over yttria/zirconia

A.G. Steghuis, A.G. Steghuis, J.G. van Ommen, J.A. Lercher

Catalytic Processes and Materials

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Abstract

Oxidation of methane over yttria/zirconia mixed oxide shows two parallel oxidation pathways, i.e. partial oxidation to CO+H2+H2O and full oxidation to CO2+2H2O. Both reactions proceed via a Mars van Krevelen mechanism with first order kinetics for methane and oxygen and are retarded by water. A mechanism is suggested in which methane is homolitically dissociated over O−(s) sites and via the formation and decomposition of a formaldehyde precursor reacted to CO, H2 and H2O. In parallel, CO2 is obtained from decomposition of bicarbonate that is formed via further oxidation of dioxymethylene.

Original language	Undefined
Pages (from-to)	91-97
Number of pages	7
Journal	Catalysis today
Volume	46
Issue number	46
DOIs	https://doi.org/10.1016/S0920-5861(98)00330-7
Publication status	Published - 1998

Keywords

METIS-105557
IR-73903
Kinetics
Yttria/zirconia
Methane partial oxidation
Methane pulse

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10.1016/S0920-5861(98)00330-7

Cite this

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title = "on the reaction mechanism for methane partial oxidation over yttria/zirconia",

abstract = "Oxidation of methane over yttria/zirconia mixed oxide shows two parallel oxidation pathways, i.e. partial oxidation to CO+H2+H2O and full oxidation to CO2+2H2O. Both reactions proceed via a Mars van Krevelen mechanism with first order kinetics for methane and oxygen and are retarded by water. A mechanism is suggested in which methane is homolitically dissociated over O−(s) sites and via the formation and decomposition of a formaldehyde precursor reacted to CO, H2 and H2O. In parallel, CO2 is obtained from decomposition of bicarbonate that is formed via further oxidation of dioxymethylene.",

keywords = "METIS-105557, IR-73903, Kinetics, Yttria/zirconia, Methane partial oxidation, Methane pulse",

author = "A.G. Steghuis and A.G. Steghuis and {van Ommen}, J.G. and J.A. Lercher",

year = "1998",

doi = "10.1016/S0920-5861(98)00330-7",

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volume = "46",

pages = "91--97",

journal = "Catalysis today",

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TY - JOUR

T1 - on the reaction mechanism for methane partial oxidation over yttria/zirconia

AU - Steghuis, A.G.

AU - van Ommen, J.G.

AU - Lercher, J.A.

PY - 1998

Y1 - 1998

N2 - Oxidation of methane over yttria/zirconia mixed oxide shows two parallel oxidation pathways, i.e. partial oxidation to CO+H2+H2O and full oxidation to CO2+2H2O. Both reactions proceed via a Mars van Krevelen mechanism with first order kinetics for methane and oxygen and are retarded by water. A mechanism is suggested in which methane is homolitically dissociated over O−(s) sites and via the formation and decomposition of a formaldehyde precursor reacted to CO, H2 and H2O. In parallel, CO2 is obtained from decomposition of bicarbonate that is formed via further oxidation of dioxymethylene.

AB - Oxidation of methane over yttria/zirconia mixed oxide shows two parallel oxidation pathways, i.e. partial oxidation to CO+H2+H2O and full oxidation to CO2+2H2O. Both reactions proceed via a Mars van Krevelen mechanism with first order kinetics for methane and oxygen and are retarded by water. A mechanism is suggested in which methane is homolitically dissociated over O−(s) sites and via the formation and decomposition of a formaldehyde precursor reacted to CO, H2 and H2O. In parallel, CO2 is obtained from decomposition of bicarbonate that is formed via further oxidation of dioxymethylene.

KW - METIS-105557

KW - IR-73903

KW - Kinetics

KW - Yttria/zirconia

KW - Methane partial oxidation

KW - Methane pulse

U2 - 10.1016/S0920-5861(98)00330-7

DO - 10.1016/S0920-5861(98)00330-7

M3 - Article

SN - 0920-5861

VL - 46

SP - 91

EP - 97

JO - Catalysis today

JF - Catalysis today

IS - 46

ER -