Abstract
n-Dodecane was hydroisomerized over Pt supported on Y zeolites with different acid characteristics in a batch reactor. The Y zeolites used were NaY, HY (SiO2/Al2O3=5.1), HY (SiO2/Al2O3=80), and HY (SiO2/Al2O3=200). NaY was ion exchanged with NH4Cl to impart acidity. HY (SiO2/Al2O3=5.1) and HY (SiO2/Al2O3=80) were silylated to modify their acidity. HY(80) and NaY(5.1) zeolites were examined by XRD and NMR methods only, while Pt/NaY and Pt/HY samples were subjected to investigation, besides XRD method, by N2 adsorption/desorption, NH3 TPD, and FT-IR methods. For NaY, HY (SiO2/Al2O3=5.1), HY (SiO2/Al2O3=80) and HY (SiO2/Al2O3=200), the conversion of n-dodecane decreased with increasing SiO2/Al2O3, whereas selectivity of isomerization increased with increasing SiO2/Al2O3. HY (SiO2/Al2O3=80) showed the best hydroisomerization activity. The catalytic activities of NaY and HY (SiO2/Al2O3=5.1) were enhanced significantly by ion-exchange and silyation, respectively. The effects of temperature, pressure and Pt loading on the catalytic activity were also investigated.
Original language | English |
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Pages (from-to) | 111-117 |
Number of pages | 7 |
Journal | Chemical Engineering Journal |
Volume | 232 |
DOIs | |
State | Published - Oct 2013 |
Keywords
- Acidity
- Hydroisomerization
- N-Dodecane
- Pt
- Y zeolite