Support oxide tuning of MnOx-Na2WO4 catalysts enables low-temperature light-off of OCM

Jiaqi Si; Weidong Sun; Guofeng Zhao; Yong Lu

doi:10.1016/j.fuel.2021.122539

Support oxide tuning of MnO_x-Na₂WO₄ catalysts enables low-temperature light-off of OCM

Jiaqi Si
, Weidong Sun
, Guofeng Zhao^*
, Yong Lu

^*Corresponding author for this work

School of Chemistry and Molecular Engineering

East China Normal University

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

17 Scopus citations

Abstract

The MnO_x-Na₂WO₄ catalyst for oxidative coupling of methane (OCM) is highly attractive but its high light-off temperature (>800 °C) is a major obstacle for commercialization. In-depth understanding of reaction light-off relevant chemistry is particularly desirable. We explored the OCM light-off over several metal-oxide-supported MnO_x-Na₂WO₄ catalysts. As CH₄ conversion above 15% with acceptable C_2-3 selectivity is considered as the sign of OCM light-off, support-dependent OCM light-off is clearly observed over MnO_x-Na₂WO₄ supported on SnO₂ (660 °C), TiO₂ (670 °C), MgO (690 °C), and ZnO (720 °C), being tightly linked with the redox rate of Mn³⁺(or Mn⁴⁺) ↔ Mn²⁺ cycle governed by support oxides.

Original language	English
Article number	122539
Journal	Fuel
Volume	311
DOIs	https://doi.org/10.1016/j.fuel.2021.122539
State	Published - 1 Mar 2022

Keywords

Ethylene
Low-temperature light-off
MnO-NaWO catalyst
Oxidative coupling of methane
Redox cycle

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10.1016/j.fuel.2021.122539

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@article{35d24fd8bc3c4f3e85eba965d8803c6b,

title = "Support oxide tuning of MnOx-Na2WO4 catalysts enables low-temperature light-off of OCM",

abstract = "The MnOx-Na2WO4 catalyst for oxidative coupling of methane (OCM) is highly attractive but its high light-off temperature (>800 °C) is a major obstacle for commercialization. In-depth understanding of reaction light-off relevant chemistry is particularly desirable. We explored the OCM light-off over several metal-oxide-supported MnOx-Na2WO4 catalysts. As CH4 conversion above 15\% with acceptable C2-3 selectivity is considered as the sign of OCM light-off, support-dependent OCM light-off is clearly observed over MnOx-Na2WO4 supported on SnO2 (660 °C), TiO2 (670 °C), MgO (690 °C), and ZnO (720 °C), being tightly linked with the redox rate of Mn3+(or Mn4+) ↔ Mn2+ cycle governed by support oxides.",

keywords = "Ethylene, Low-temperature light-off, MnO-NaWO catalyst, Oxidative coupling of methane, Redox cycle",

author = "Jiaqi Si and Weidong Sun and Guofeng Zhao and Yong Lu",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2022",

month = mar,

day = "1",

doi = "10.1016/j.fuel.2021.122539",

language = "英语",

volume = "311",

journal = "Fuel",

issn = "0016-2361",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Support oxide tuning of MnOx-Na2WO4 catalysts enables low-temperature light-off of OCM

AU - Si, Jiaqi

AU - Sun, Weidong

AU - Zhao, Guofeng

AU - Lu, Yong

PY - 2022/3/1

Y1 - 2022/3/1

N2 - The MnOx-Na2WO4 catalyst for oxidative coupling of methane (OCM) is highly attractive but its high light-off temperature (>800 °C) is a major obstacle for commercialization. In-depth understanding of reaction light-off relevant chemistry is particularly desirable. We explored the OCM light-off over several metal-oxide-supported MnOx-Na2WO4 catalysts. As CH4 conversion above 15% with acceptable C2-3 selectivity is considered as the sign of OCM light-off, support-dependent OCM light-off is clearly observed over MnOx-Na2WO4 supported on SnO2 (660 °C), TiO2 (670 °C), MgO (690 °C), and ZnO (720 °C), being tightly linked with the redox rate of Mn3+(or Mn4+) ↔ Mn2+ cycle governed by support oxides.

AB - The MnOx-Na2WO4 catalyst for oxidative coupling of methane (OCM) is highly attractive but its high light-off temperature (>800 °C) is a major obstacle for commercialization. In-depth understanding of reaction light-off relevant chemistry is particularly desirable. We explored the OCM light-off over several metal-oxide-supported MnOx-Na2WO4 catalysts. As CH4 conversion above 15% with acceptable C2-3 selectivity is considered as the sign of OCM light-off, support-dependent OCM light-off is clearly observed over MnOx-Na2WO4 supported on SnO2 (660 °C), TiO2 (670 °C), MgO (690 °C), and ZnO (720 °C), being tightly linked with the redox rate of Mn3+(or Mn4+) ↔ Mn2+ cycle governed by support oxides.

KW - Ethylene

KW - Low-temperature light-off

KW - MnO-NaWO catalyst

KW - Oxidative coupling of methane

KW - Redox cycle

UR - https://www.scopus.com/pages/publications/85119262921

U2 - 10.1016/j.fuel.2021.122539

DO - 10.1016/j.fuel.2021.122539

M3 - 文章

AN - SCOPUS:85119262921

SN - 0016-2361

VL - 311

JO - Fuel

JF - Fuel

M1 - 122539

ER -

Support oxide tuning of MnO_x-Na₂WO₄ catalysts enables low-temperature light-off of OCM

Abstract

Keywords

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