https://scholars.lib.ntu.edu.tw/handle/123456789/177707
標題: | N-pentane isomerization over platinum-promoted W/Zr mixed oxides supported on mesoporous silica | 作者: | Li, Tao Wong, She-Tin Chao, Man-Chien Lin, Hong-Ping Mou, Chung-Yuan Cheng, Soofin |
關鍵字: | Tungstated zirconia;Mixed oxide;Catalyst;Acid;Mesoporous silica;MCM-41;SBA-15;Isomerization of n-pentane;Platinum | 公開日期: | 2004 | 出版社: | Taipei:National Taiwan University Coll Management | 起(迄)頁: | - | 來源出版物: | Applied Catalysis A: General 261, 211–219 | 摘要: | W/Zr mixed oxides supported on various porous silica materials, namely SBA-15, MCM-41 & silica gel, were prepared. Their acidities & catalytic activities in n-pentane isomerization were examined. For the mesoporous silica, SBA-15 was found to retain the ordered meso-structure better than MCM-41 after loading with W/Zr mixed oxide. TEM photographs showed that tungstated zirconia was dispersed inside the mesoporous channels of SBA-15, & that the surface area & pore volume decreased with the loading. The SBA-15 supported WO3/ZrO2 materials promoted with Pt were highly catalytic efficient in n-pentane isomerization with a very high iso-pentane selectivity. In contrast, MCM-41 & silica gel supported WO3/ZrO2 showed lower catalytic activities. The optimal activity was observed on SBA-15 with 1%Pt/20%WO3/40%ZrO2. The mesoporous silica supports played an important role in stabilizing the mixed oxide catalyst since the catalytic activity decayed less markedly with time-on-stream on the supported catalysts. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006111501232938 | 其他識別: | 246246/2006111501232938 |
顯示於: | 化學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。