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

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)3667-3674
Number of pages8
JournalACS Sustainable Chemistry and Engineering
Volume5
Issue number5
DOIs
Publication statusPublished - 1 May 2017

Keywords

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

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