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6213641 
Book/Book Chapter 
Periodic operation of the oxidative coupling of methane on Ce/Li/MgO catalyst 
Hudgins, RR; Mortazavi, Y; Silveston, PL 
1992 
1 
Studies in surface science and catalysis
ISSN: 0167-2991 
Elsevier 
Studies in Surface Science and Catalysis 
73 
119-121 
Publisher Summary In 1982, Keller and Bhasin reported the screening of metal oxides as catalysts for the oxidative coupling of methane into ethane and ethylene using oxygen as an oxidant. This initial study demonstrated that a large number of metal oxides were active for this reaction. They explored both simultaneous and sequential feeding of reactants into a fixed bed of metal oxides. Simultaneous feeding of methane and air led to low values of C2 selectivity. In sequential feed operations methane and air were fed individually with a short purge of nitrogen in between. Bi et al. used cerium oxide as a third component in the Li/MgO catalyst. It was found that a Ce/Li/MgO catalyst providcd a relatively high C2 selectivity and a corresponding high yield for C2 formation compared to the Li/MgO catalyst. Bartsch et al. studied the role of cerium oxide in oxidative coupling reaction. They found that under special conditions Ce/Li/MgO catalyst was one of the most attractivc catalysts for the coupling reactions. Its best performance was observed for the catalyst with CeO2: Li2CO3: MgO wt% of 50: 5: 45 respectively. This is the catalyst chosen for the study highlighted in this chapter. Activity and C2 selectivity of the Ce/Li/MgO catalyst could be improved under a methane cycling strategy. Although no direct experiment was performed, the results suggest that most of the ethylene comes from further reactions of ethane. 
Smith, Kevin J.