Effect of TiO2on the Performance of Mn/Na2WO4Catalysts in Oxidative Coupling of Methane

Geo Jong Kim, Joshua T. Ausenbaugh, Hyun Tae Hwang

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The oxidation coupling of methane (OCM) has received attention as a direct route to produce C2 chemicals. Although the OCM is energetically more efficient than the conventional process, however, it provides relatively low C2 yield and CH4 conversion at lower temperatures. In this study, TiO2 and Ce were used as a support and a promoter to facilitate CH4 conversion by providing more available oxygen species in the Mn/Na2WO4-based catalysts. Additionally, the performance of TiO2-supported catalysts was compared with that of the conventional Mn/Na2WO4/SiO2 catalyst. Various techniques including X-ray diffraction, X-ray photoelectron spectroscopy, and H2 temperature-programmed reduction were conducted to evaluate the effect of TiO2 and Ce. The 1.9 % Mn-5% Na2WO4-5% Ce/TiO2 showed the best performance, with a maximum C2 yield of 26.1% at 775 °C and the CH4/O2 ratio of 2. This yield was higher than that of the Mn/Na2WO4-based catalysts examined in this study, indicating that TiO2 is a promising support for OCM catalysts.

Original languageEnglish
Pages (from-to)3914-3921
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume60
Issue number10
DOIs
StatePublished - Mar 17 2021

Bibliographical note

Publisher Copyright:
© 2021 American Chemical Society.

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Industrial and Manufacturing Engineering

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