Applied Catalysis A: General, Vol.162, No.1-2, 239-248, 1997
Direct Aromatization of Natural-Gas over H-Gallosilicate (MFI), H-Galloaluminosilicate (MFI) and Ga/H-ZSM-5 Zeolites
Direct Conversion of the C2+ hydrocarbons from natural gas to aromatics over H-Gallosilicate (MFI), H-Galloaluminosilicate (MFI) and Ga/H-ZSM-5 zeolites has been investigated at different temperatures (500-600 degrees C) and space velocities (500-6660 cm(3) g(-1) h(-1)). The zeolites are compared for their activity/selectivity and distribution of aromatics formed in the natural gas-to-aromatics conversion at different process conditions. The performance shown by the zeolites is in the following order : H-Galloaluminosilicate (MFI) much greater than H-Gallosilcate (MFI) > Ga/H-ZSM-5. Natural gas, containing 27.3 wt% C2+ hydrocarbons, can be converted to aromatics with very high selectivity (approximate to 90%) at a high conversion (70%) of C2+ hydrocarbons over H-Galloaluminosilicate (MFI) zeolite at 600 degrees C and space velocity of 3000 cm(3) g(-1) h(-1).
Keywords:INITIAL ACTIVITY SELECTIVITY;ZSM-5 TYPE ZEOLITE;PROPANE AROMATIZATION;HYDROTHERMAL PRETREATMENTS;LIGHT ALKANES;N-HEXANE;CATALYSTS;GALLIUM;H-ZSM-5;DEACTIVATION