Pt Loaded HIGH-Ga Silicates for Aromatization of Light Paraffins and Methane

High Ga-contained pentasil type Ga-silicates having Si/Ga atomic ratios 20, 15, and 10 were synthesized by adopting the rapid crystallization method. The conversion rate of ethane was lower than that of propane, however since the selectivity to aromatics increased very much on the Pt/H-Ga-silicate, which involved Ga as Si/Ga ratio 15, the space-time yield of aromatics from ethane was rather higher than that from propane. Addition of O 2 or H 2 in the feed gas for ethane conversion retarded the reaction, indicating that the balance of dehydrogenation and hydrogenation activities is necessary to advance the aromatization. Although the conversion was very low, methane to aromatic conversion was observed on this catalyst.