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Na2WO4-Mn/mullite Catalysts for Oxidative Coupling of Methane

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Abstract:

The catalysts, 5 wt% Na2WO4 -2 wt% Mn on mullites sintered at 1200°C, 1300°C, 1400°C, and 1500 °C, were prepared by incipient wetness impregnation method for the oxidative coupling of methane (OCM) reaction in a fixed-bed quartz tube reactor. These catalysts were characterized by XRD, XPS and BET method. The XRD pattern of Na2WO4-Mn/mullite indicated that the main crystal phase of metal oxide was MnWO4. From the XPS spectra, the results revealed the information on Na, W and Mn species distributed on the catalyst surface. For catalytic activity testing, Na2WO4-Mn/mullite sintered at 1300 °C showed the highest C2 selectivity of 11.4% and Na2WO4-Mn/mullite sintered at 1400 °C showed the highest CH4 conversion of 56.6%.

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Periodical:

Advanced Materials Research (Volumes 287-290)

Pages:

3015-3019

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.287-290.3015

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Online since:

July 2011

Authors:

Pinsuda Viravathana, Narathorn Sukwises, Siriporn Boonpa, Siriporn Larpkiattaworn

Keywords:

Alumino-Silicate, Mullite, Na2Wo4-Mn, Oxidative Coupling of Methane

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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