Abstract: Ga/HZSM-5 catalysts were prepared using nano-scale HZSM-5 hydrothermally treated under various temperatures as base materials. The aromatization performances of Ga/HZSM-5 catalysts were investigated using full rang FCC gasoline as feed. Results showed that Ga/HZSM-5 catalyst prepared with nano-HZSM-5 hydrothermally treated under 600 ℃ followed by HNO3 washing exhibited the best aromatization performance: under a reaction temperature of 480 ℃ and WHSV of 1 h-1，the volume fraction of aromatics and (C3+C4 ) in the product was 58.3% and 7.6%, respectively. When a second metal, such as Fe, Cu and Cr, was introduced into Ga/HZSM-5 catalyst, without positive effect on its aromatization performance was observed under the testing conditions.

Key words: aromatization, hydrothermal treatment, HZSM-5, FCC gasoline