Comparison of impregnation, liquid- and solid-state ion exchange procedures for the incorporation of nickel in HMFI, HMOR and HBEA: Activity and selectivity in n-nonane hydroconversion

✍ Scribed by G Kinger; A Lugstein; R Swagera; M Ebel; A Jentys; H Vinek

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 151 KB
• Volume: 39
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/s1387-1811(00)00211-0

✦ Synopsis

Nickel containing HMFI, HMOR and HBEA zeolites was prepared by impregnation and liquid-and solid-state ion exchange. The kinetics of the solid-state ion exchange of the protons (Brùnsted acid sites) with NiCl 2 was followed by IR and TPE measurements. The results were compared to catalysts prepared by liquid-phase ion exchange and by incipient wetness impregnation. The level of ion exchange reached 100% when the solid-state procedure was used, whereas the exchange level was limited in the case of liquid exchange. The exchange degree increased in the sequence BEA MFI MOR. The dierently prepared nickel containing zeolites showed a comparable activity and selectivity for the n-nonane hydroconversion with Ni/HMFI as the most active and Ni/HBEA as the most selective catalyst.