| Abstrakt: |
Herein, platinum-loaded MCM-48-Mordenite, Al-MCM-48, Al-MCM-48-Mordenite, Zr-MCM-48, and Zr-MCM-48-Mordenite catalysts were synthesized and studied for the isomerization reaction of n-heptane at four different temperatures. XRD, XRF, FT-IR, UV-Vis DRS, NH3-TPD, TG/DTA and BET analysis were used to characterize the structural characterizationand acid distribution of these catalysts. The Pt/Mordenite catalyst showed higher hydrogenation and cracking activity, while the hybrid catalysts showed better isomerization selectivity. The Pt/Al-MCM-48-Mordenite catalyst showed the best catalytic behavior at 200 °C with a suitable n-heptane conversion (78.8%) and the highest isomer selectivity (81.9%). The maximum isomerization selectivity as well as the maximum yield of multi-branched isomers are probably not only due to the suitable acidity and the large pores, but also to the higher metal dispersion. This result shows that the Pt/Al-MCM-48-Mordenite catalyst can be a hopeful candidate for good n-heptane isomerization catalysts. [ABSTRACT FROM AUTHOR] |
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