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Surface processes in the catalytic oxidative coupling of methane to ethane

✍ Scribed by Olga Buyevskaya; Dorit Wolf; Manfred Baerns

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
695 KB
Volume
113
Category
Article
ISSN
0165-0513

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✦ Synopsis

Abstract

Recent results on surface reaction steps in the oxidative coupling of methane (OCM) obtained from (1) transient experiments and (2) a microkinetic analysis are summarized. The interaction of methane and oxygen with MgO and Sm~2~O~3~ surfaces was investigated by applying H/D‐ and oxygen‐isotope‐exchange reactions. The role of short‐lived adsorbed oxygen species in methane activation and product formation over MgO and Sm~2~O~3~ catalysts is discussed. Furthermore, elementary reaction steps and their rate constants are derived for the oxidative conversion of methane to CO~x~ and ethane from kinetic data for different (CaO)~x~(CeO~2~)~1βˆ’x~ catalysts; the rate constants are related to the solid's properties, i.e., electron and O^2βˆ’^ conductivity.

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Comparison of the surface and catalytic properties of rare earth-promoted CaO catalysts in the oxidative coupling of methane
✍ Vilas H Rane; Sopan T Chaudhari; Vasant R Choudhary πŸ“‚ Article πŸ“… 2006 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 141 KB πŸ‘ 1 views

## Abstract Rare earth (viz. La, Ce, Sm, Nd and Yb) promoted CaO catalysts have been investigated, comparing their surface properties (viz. surface area and basicity/base strength distribution) and catalytic activity/selectivity in the oxidative coupling of methane at different reaction conditions