MnTiO₃-driven low-temperature oxidative coupling of methane over TiO₂-doped Mn₂O₃-Na₂WO₄/SiO₂ catalyst.

ABSTRACT: Oxidative coupling of methane (OCM) is a promising method for the direct conversion of methane to ethene and ethane (C₂ products). Among the catalysts reported previously, Mn₂O₃-Na₂WO₄/SiO₂ showed the highest conversion and selectivity, but only at 800° to 900°C, which represents a substantial challenge for commercialization. We report a TiO₂-doped Mn₂O₃-Na₂WO₄/SiO₂ catalyst by using Ti-MWW zeolite as TiO₂ dopant as well as SiO₂ support, enabling OCM with 26% conversion and 76% C₂-C₃ selectivity at 720°C because of MnTiO₃ formation. MnTiO₃ triggers the low-temperature Mn²⁺↔Mn^3+</

SUBMITTER: Wang P 

PROVIDER: S-EPMC5466374 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature