Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 5, Issue 5, Pages 3667-3674Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.6b02914
Keywords
Oxidative coupling of methane; Mg/Ti/Si mixed oxide; Catalyst; Methane upgrading
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Funding
- C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2015M3D3A1A01064900]
- National Research Foundation of Korea [2015M3D3A1A01064900] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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% C-2. yield at 800 degrees C, which is a 35% higher C-2 yield than that obtained using conventional Na2WO4/Mn/SiO2 in this study. The formation of Mg/Ti-doped a-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 alpha-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 O-2-temperature-programmed desorption were performed in an effort to understand the improved catalytic OCM activity of Mg/Ti-doped SiO2-supported Na2WO4/Mn catalysts.
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