n-Hexane Isomerization by Pt/WO3-ZrO2 Using Hydrothermally Synthesized Hydrous Zirconia as Support
n-Hexane Isomerization by Pt/WO3-ZrO2 Using Hydrothermally Synthesized Hydrous Zirconia as Support
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DOI：
10.1016/s1872-2067(09)60024-3
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发表时间：
2008-12-01
影响因子：
16.5
通讯作者：
Xu Longya
中科院分区：
文献类型：
--
作者：
Song Yueqin;Kang Chenglin;Xu Longya
采用水热法制备了一系列水合氧化锆样品，并采用浸渍法制备了Pt/WO 3-ZrO 2催化剂。考察了Zr（OH）（4）的水热温度对催化剂异构化活性的影响。用X射线衍射对催化剂的晶体结构、酸性和还原性能进行了表征。NH3程序升温脱附和H-2程序升温还原。结果表明，水合氧化锆和催化剂的晶型随水热温度的变化而变化，随着水热温度的升高，四元氧化锆的含量减少。Zr（OH）（4）的晶化使催化剂上的强酸性中心增加，异构化活性提高。这可能与该催化剂中存在大量的强酸中心有关。
A series of hydrous zirconia samples were prepared by the hydrothermal method, and the Pt/WO3-ZrO2 catalyst was prepared by impregnation. The effects of hydrothermal temperature of Zr(OH)(4) on the isomerization activity of the catalyst was investigated. The crystalline structure, acidity, and reduction properties of the catalyst were characterized by X-ray diffraction. NH3 temperature-programmed desorption, and H-2 temperature-programmed reduction, respectively. The results indicated that the crystalline structure of hydrous zirconia and the catalyst varied with the hydrothermal temperature, and the increase of hydrothermal temperature reduced the fraction of tetragonal zirconia. Strong acide sites on the catalyst and the isomerization activity increased with the crystallization of Zr(OH)(4). It was proposed that the higher isomerization activity may be related to the existence of large numbers of strong acid sites.