Collect. Czech. Chem. Commun. 1992, 57, 2548-2552

Lead Containing Zeolites as Catalysts for Oxidative Conversion of Methane

Pavlina Ch. Kovachevaa, Nadka P. Davidovaa and Alvin H. Weissb

a Institute of Kinetics and Catalysis, Bulgarian Academy of Sciences, Sofia 1040, Bulgaria
b Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, U.S.A.


The oxidative conversion of methane was studied over lead containing zeolites of type X, silicalite and ALPO-5 in the temperature range 750-850 °C. An impregnation of catalysts in the range 3-7 wt.% lead was found optimum for the conversion and C2 selectivity. The 6.4 wt.% lead-containing zeolite showed the best C2 hydrocarbon yield. Higher reaction temperatures caused higher C2H4/C2H6 ratios. The catalysts did not deactivate in 10 h time-on-stream. PbO and zeolitic basic sites play role in the reaction.