关键词: 催化裂化, 汽油, 芳构化, 催化剂, 烯烃

Abstract: Using HZSM-5 zeolite as support, ammonium molybdate, ammonium biphosphate and zirconium nitrate as the sources of molybdenum, phosphorus and zirconium respectively, an oxidized precursor was obtained by co-precipitation method, and followed by temperature-programming reduction (TPR) to form MoP/ZrO2/HZSM-5 catalyst. The prepared catalysts were characterized by XRD and BET methods. The aromatization tests of full-range FCC naphtha over MoP/ZrO2/HZSM-5 catalysts were conducted on a small-scale fixed bed reactor to investigate the effect of catalyst compositions on the catalytic performance of catalyst. Results showed that optimal aromatization performance was observed with a catalyst containing 25% molybdenum, 10% ZrO2 and having initial Mo/P molar ratio of 1:1.5, under the conditions of a reaction temperature of 360 ℃，a reaction pressure of 2.5 Mpa, a LHSV of 1.0 h-1 and H2/oil volume ratio of 400, the liquid product yield was 92.52 % and this liquid product having an aromatic mass fraction of 38.37 % and an olefin mass fraction of 18.11 %.

Key words: catalytic cracking, gasoline stock, aromatization, catalysts, olefin