A novel insight into enhanced propane combustion performance on PtUSY catalyst

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• 作者：Hui Luo ; Xiao-Dong Wu ; Duan Weng ; Shuang Liu ; Rui Ran
• 关键词：Platinum ; Zeolite ; Propane combustion ; Adsorption ; Metallic state ; Acidity
• 刊名：Rare Metals
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：36
• 期：1
• 页码：1-9
• 全文大小：2973KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Metallic Materials; Nanotechnology; Ceramics, Glass, Composites, Natural Materials; Surfaces and Interfaces, Thin Films; Inorganic Chemistry; Physical Chemistry;
• 出版者：Nonferrous Metals Society of China
• ISSN：1867-7185
• 卷排序：36

文摘

Platinum was supported on γ-Al₂O₃ and ultra-stable Y zeolite (USY) by an incipient wetness impregnation method. The catalysts were characterized by nitrogen physisorption, transmission electron microscopy (TEM), CO/C₃H₈ isothermal oxidations, NH₃ temperature-programmed desorption (NH₃–TPD) and infrared (IR) spectroscopy of adsorbed probe molecules (CO, C₃H₈ and C₃H₈ + O₂). Compared with Pt/Al₂O₃, PtUSY catalyst shows obviously higher activity for the combustion of propane. After estimating the size effect of Pt particles and propane adsorption capacity of USY, the excellent activity of PtUSY is also attributed to the strong interactions between the precious metal and the acidic zeolite. It inhibits the oxidation of Pt in an oxygen-rich atmosphere at high temperatures, which facilitate the initial oxidation step involving the C–H bond activation on metallic Pt as reflected by in situ diffuse reflectance infrared Fourier-transformed (DRIFT) spectra.