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- W1569018152 abstract "Isomerization of n-pentane to iso-pentane was studied on a series of ZSM-5 catalyst under hydrogen and nitrogen atmosphere. A H-ZSM-5 catalyst showed low n-pentane conversion and iso-pentane selectivity. A Pt-ZSM-5 catalyst, which is typical bifunctional catalyst for skeletal isomerization of normal paraffins, showed high activity reaching an equilibrium conversion. A hybrid catalyst prepared by physically mixing H-ZSM-5 and Pt/SiO2 or Pt/Al2O3 showed high activity and selectivity equal to those of Pt/ZSM-5 while H-ZSM-5, Pt/SiO2 and Pt/Al2O3 had a poor catalytic performance for this reaction. A hybrid catalyst containing palladium showed comparable catalytic performance to Pt-hybrid catalyst, however a palladium ion-exchanged ZSM-5 catalyst did not. With the hybrid catalyzed reaction, the mixing state of H-ZSM-5 and Pt/SiO2 had a strong influence on the activity and iso-pentane selectivity. In the absence of hydrogen, the conversion of n-pentane was drastically reduced and the oligomerization reaction became dominant. These result suggest that spilt-over hydrogen plays an important role in alkane activation and the stabilization of intermediates to give high isomer yield." @default.
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- W1569018152 date "1995-01-01" @default.
- W1569018152 modified "2023-10-05" @default.
- W1569018152 title "Hydroisomerization of n-pentane over hybrid catalysts, new concept and design of hybrid catalyst" @default.
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- W1569018152 doi "https://doi.org/10.1016/s0167-2991(06)81256-5" @default.
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