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Propane dehydrogenation and oxidation over nanocrystalline Pt/γ- and χ- Al2O3 catalyst |
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| รหัสดีโอไอ | |
| Title | Propane dehydrogenation and oxidation over nanocrystalline Pt/γ- and χ- Al2O3 catalyst |
| Creator | Thongchai Glinrun |
| Contributor | Piyasan Praserthdam, Choowong Chaisuk |
| Publisher | Chulalongkorn University |
| Publication Year | 2553 |
| Keyword | Catalyst supports, Platinum catalysts, Propane dehydrogenation, Propane oxidation, Nanocrystals, Oxidation |
| Abstract | In this thesis, gamma(γ), chi(χ) and mixed-phase (χ/γ) alumina supports were prepared by solvothermal method of a mixed solution of toluene and butanol and used as the supports for Pt/Al2O3 catalysts. Although, γ-alumina possessed higher BET surface area and higher acidity than χ-phase alumina, the measured amount of active sites for Pt/χ-Al2O3 and Pt/γ-Al2O3 were quite similar. Pt/χ/γ-Al2O3 showed higher active sites or higher Pt dispersion. In propane oxidation, the results showed that the mixed-phase catalysts with higher amount of Pt dispersion exhibited much higher propane conversion than both pure gamma and chi alumina. In the presence of H2, the propane dehydrogenation activities over Pt/χ-Al2O3 were higher than Pt/γ-Al2O3 due probably to the easier desorption of H2 molecule as revealed by lower desorption temperature in the H2-TPD. The selectivity to propylene was low in Pt/χ-Al2O3 catalyst due to the side reactions of cracking and hydrogenolysis were more important for propane dehydrogenation. |
| URL Website | cuir.car.chula.ac.th |
