Oxidative Coupling of Methane Using Mg/Ti-Doped SiO2-Supported Na2WO4/Mn Catalysts

Rika Tri Yunarti; Sangseo Gu; Jae Wook Choi; Jungho Jae; Dong Jin Suh; Jeong Myeong Ha

doi:10.1021/acssuschemeng.6b02914

Oxidative Coupling of Methane Using Mg/Ti-Doped SiO₂-Supported Na₂WO₄/Mn Catalysts

Rika Tri Yunarti, Sangseo Gu, Jae Wook Choi, Jungho Jae, Dong Jin Suh, Jeong Myeong Ha

Department of Chemistry

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

48 Citations (Scopus)

Abstract

The oxidative coupling of methane (OCM) was performed using Na₂WO₄/Mn catalysts supported on Mg/Ti/Si mixed oxides. Na₂WO₄/Mn/Mg_0.05Ti_0.05Si_0.90O_n exhibited a 23.1% C₂ yield at 800 °C, which is a 35% higher C₂ yield than that obtained using conventional Na₂WO₄/Mn/SiO₂ in this study. The formation of Mg/Ti-doped α-cristobalite SiO₂ was observed for supported Na₂WO₄/Mn catalysts, and their improved catalytic activity could be attributed to the suppressed incorporation of Na/W/Mn compounds into the α-cristobalite SiO₂ structure and the existence of OCM-active Na/W/Mn compounds exposed on the support surface. X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, and O₂-temperature-programmed desorption were performed in an effort to understand the improved catalytic OCM activity of Mg/Ti-doped SiO₂-supported Na₂WO₄/Mn catalysts.

Original language	English
Pages (from-to)	3667-3674
Number of pages	8
Journal	ACS Sustainable Chemistry and Engineering
Volume	5
Issue number	5
DOIs	https://doi.org/10.1021/acssuschemeng.6b02914
Publication status	Published - 1 May 2017

Keywords

Catalyst
Methane upgrading
Mg/Ti/Si mixed oxide
Oxidative coupling of methane

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10.1021/acssuschemeng.6b02914

Cite this

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title = "Oxidative Coupling of Methane Using Mg/Ti-Doped SiO2-Supported Na2WO4/Mn Catalysts",

abstract = "The oxidative coupling of methane (OCM) was performed using Na2WO4/Mn catalysts supported on Mg/Ti/Si mixed oxides. Na2WO4/Mn/Mg0.05Ti0.05Si0.90On exhibited a 23.1% C2 yield at 800 °C, which is a 35% higher C2 yield than that obtained using conventional Na2WO4/Mn/SiO2 in this study. The formation of Mg/Ti-doped α-cristobalite SiO2 was observed for supported Na2WO4/Mn catalysts, and their improved catalytic activity could be attributed to the suppressed incorporation of Na/W/Mn compounds into the α-cristobalite SiO2 structure and the existence of OCM-active Na/W/Mn compounds exposed on the support surface. X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, and O2-temperature-programmed desorption were performed in an effort to understand the improved catalytic OCM activity of Mg/Ti-doped SiO2-supported Na2WO4/Mn catalysts.",

keywords = "Catalyst, Methane upgrading, Mg/Ti/Si mixed oxide, Oxidative coupling of methane",

author = "Yunarti, {Rika Tri} and Sangseo Gu and Choi, {Jae Wook} and Jungho Jae and Suh, {Dong Jin} and Ha, {Jeong Myeong}",

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2017",

month = may,

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doi = "10.1021/acssuschemeng.6b02914",

language = "English",

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T1 - Oxidative Coupling of Methane Using Mg/Ti-Doped SiO2-Supported Na2WO4/Mn Catalysts

AU - Yunarti, Rika Tri

AU - Gu, Sangseo

AU - Choi, Jae Wook

AU - Jae, Jungho

AU - Suh, Dong Jin

AU - Ha, Jeong Myeong

PY - 2017/5/1

Y1 - 2017/5/1

N2 - The oxidative coupling of methane (OCM) was performed using Na2WO4/Mn catalysts supported on Mg/Ti/Si mixed oxides. Na2WO4/Mn/Mg0.05Ti0.05Si0.90On exhibited a 23.1% C2 yield at 800 °C, which is a 35% higher C2 yield than that obtained using conventional Na2WO4/Mn/SiO2 in this study. The formation of Mg/Ti-doped α-cristobalite SiO2 was observed for supported Na2WO4/Mn catalysts, and their improved catalytic activity could be attributed to the suppressed incorporation of Na/W/Mn compounds into the α-cristobalite SiO2 structure and the existence of OCM-active Na/W/Mn compounds exposed on the support surface. X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, and O2-temperature-programmed desorption were performed in an effort to understand the improved catalytic OCM activity of Mg/Ti-doped SiO2-supported Na2WO4/Mn catalysts.

AB - The oxidative coupling of methane (OCM) was performed using Na2WO4/Mn catalysts supported on Mg/Ti/Si mixed oxides. Na2WO4/Mn/Mg0.05Ti0.05Si0.90On exhibited a 23.1% C2 yield at 800 °C, which is a 35% higher C2 yield than that obtained using conventional Na2WO4/Mn/SiO2 in this study. The formation of Mg/Ti-doped α-cristobalite SiO2 was observed for supported Na2WO4/Mn catalysts, and their improved catalytic activity could be attributed to the suppressed incorporation of Na/W/Mn compounds into the α-cristobalite SiO2 structure and the existence of OCM-active Na/W/Mn compounds exposed on the support surface. X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, and O2-temperature-programmed desorption were performed in an effort to understand the improved catalytic OCM activity of Mg/Ti-doped SiO2-supported Na2WO4/Mn catalysts.

KW - Catalyst

KW - Methane upgrading

KW - Mg/Ti/Si mixed oxide

KW - Oxidative coupling of methane

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