Oxidative Coupling of Methane on Fe-Doped La2O3 Catalyst

Various La 2 O 3 -based catalysts are well-known to be useful for the oxidative coupling of methane (OCM reaction). We examined the catalytic activities of various La 2 O 3 -based OCM catalysts for the OCM reaction in the kinetic region (i.e., lower O 2 conversion). Our investigation revealed that the Fe-doped La 2 O 3 catalyst is a good candidate for the OCM reaction. The La/Fe ratio of the Fe-doped La 2 O 3 catalyst is an important factor for OCM activity. Especially, the O 2 -based C 2 yield of the Fe-doped La 2 O 3 catalyst was higher than that of La 2 O 3 in the case of La/Fe > 5. The Fe-doped La 2 O 3 catalyst modified with Na 2 O and Na 4 P 2 O 7 showed high C 2 selectivity (83%). Moreover, modification with Bi compounds also enhanced C 2 selectivity of the Fe-doped La 2 O 3 catalyst. This catalyst showed higher C 2 yield than the Fe-doped La 2 O 3 catalyst.