Al2O3−TiO2/Al2O3−TiO2−SiO2 Composite-Supported Bimetallic Pt−Pd Catalysts for the Hydrodearomatizat

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• 作者：Guofu Wan ; Aijun Duan ; Zhen Zhao ; Guiyuan Jiang ; Dengqian Zhang ; Ruili Li ; Tao Dou ; Keng H. Chung
• 刊名：Energy & Fuels
• 出版年：2009
• 出版时间：January 22, 2009
• 年：2009
• 卷：23
• 期：1
• 页码：81-85
• 全文大小：314K
• 年卷期：v.23,no.1(January 22, 2009)
• ISSN：1520-5029

文摘

Al₂O₃−TiO₂ and Al₂O₃−TiO₂−SiO₂ (denoted as AT and ATS) composite oxides were synthesized by the sol−gel method, which were used as supports for bimetallic Pt−Pd catalysts. The typical physicochemical properties of the catalyst samples were characterized by means of N₂ adsorption, UV−vis diffuse reflectance spectroscopy (DRS), and X-ray diffraction (XRD). The diesel hydrodearomatization (HDA) and hydrodesulfurization (HDS) activities of the catalysts were evaluated using a microreactor system. In comparison to the Pt−Pd/AT catalysts, all of the Pt−Pd/ATS catalysts showed much higher HDA activities. A 100 h test showed that the Pt−Pd/ATS catalyst had a high equilibrium HDA activity, with 432 ppm sulfur diesel. The enhanced HDA activity and sulfur tolerance of Pt−Pd/ATS were likely attributed to the incorporations of Ti and Si into Al₂O₃, which optimized the interaction between the catalyst support and active metals.