CAJ | 학술논문

采用不同方法制备了一系列具有一定晶相结构的水合ZrO_2,考察了制备方法对水合ZrO_2晶化方式及Pt/WO_3-ZrO_2催化剂催化正己烷异构化活性的影响.采用X射线衍射,Raman光谱和NH_(3-)程序升温脱附对催化剂进行了表征.结果表明,水合ZrO_2的晶化方式与制备时氧气的存在与否有关,也大大影响了催化剂的异构化活性.以无氧条件下制备的水合ZrO_2为载体时,Ft/WO_3-ZrO_2催化剂具有较高的异构化活性,而以在空气气氛中制得的水合ZrO_2为载体时,Pt/WO_3-ZrO_2几乎无异构化活性.
채용불동방법제비료일계렬구유일정정상결구적수합ZrO_2,고찰료제비방법대수합ZrO_2정화방식급Pt/WO_3-ZrO_2최화제최화정기완이구화활성적영향.채용X사선연사,Raman광보화NH_(3-)정서승온탈부대최화제진행료표정.결과표명,수합ZrO_2적정화방식여제비시양기적존재여부유관,야대대영향료최화제적이구화활성.이무양조건하제비적수합ZrO_2위재체시,Ft/WO_3-ZrO_2최화제구유교고적이구화활성,이이재공기기분중제득적수합ZrO_2위재체시,Pt/WO_3-ZrO_2궤호무이구화활성.
A series of crystalline hydrous zirconia supports were prepared by different methods. The preparation method affected the crystallization of the supports and catalytic activity of Pt/WO_3-ZrO_2 for n-hexane isomerization. The catalysts were characterized by X-ray diffraction, Raman spectroscopy, and NH_3 temperature-programmed desorption. The crystallization of hydrous zirconia was affected by the ambience used in the synthesis. Crystalline hydrous zirconia prepared in the absence of oxygen led to a catalyst with high activity, and the case was the opposite when it was prepared in the presence of oxygen.