Synergistic effect of Zn with Ni on ZSM-5 as propane aromatization catalyst: effect of temperature and feed flowrate

This work shows how propane was catalytically converted to aromatic compounds over Zn-Ni/HZSM-5 investigate the synergistic role of nickel as a zinc stabilizer and promoter in aromatization. Co-impregnation method employed for Zn-Ni/ZSM-5 synthesis fixed 2 wt% 1, 3 nickel. Modified catalysts’ were fully characterized. Catalysts crystallinity, structure microporosity retained from analysis results. The aromatization process conducted at 540 °C, 1200 ml/g-h gas hourly space velocity atmospheric pressure. presence Ni with Zn improved catalytic performance all loading. Aromatic selectivity conversion improved, best be Zn, on ZSM-5 averaging 88 60% twelve hours’ time stream. is eight times better than parent HZSM-5 one half Zn/ZSM-5 catalyst. electronic interaction resulting equality oxidation state +1 +2 metal-binding energy change synergistically bimetallic Zn/ZSM-5. Flowrate increase 6 35 ml min?1 decreased 80–40% increased 55–80%. Temperature 500–580 °C favours both 50–68 55–92% respectively. metallic interactions H2-TPR XPS revealed big improvement conversion, product distribution.