Non oxidative Activation of Methane over Ga Containing Zeolites

The H Galloaluminosilicate (MFI) and H Gallosilicate (MFI) with various Si/Al,Si/Ga ratios have been synthesized by hydrothermal method. The influence of zeolites, with and without loading MoO 3,on the catalytic performance of methane non oxidazing aromatization has been investigated. The results show that zeolites containing Ga species, which were found to be excellent catalysts for propane aromatization, are not suitable for methane aromatization. The addition of second component MoO 3 is a crucial factor for this reaction; without adding MoO 3, formation of benzene can not been observed at 973 K. H Galoalluminosilicate with 3% MoO 3 loading has methane conversion of 6% and benzene selectivity more than 80% as compared with H ZSM5 of the same Mo loading, the catalysts containing Ga species have lower methane conversion but higher ethene selectivity. Activation of methane and propane may take different routes judging from the experimental results of this.