N-Pentane isomerization over platinum-promoted W/Zr mixed oxides supported on mesoporous silica

Tao Li, She Tin Wong, Man Chien Chao, Hong Ping Lin, Chung Yuan Mou, Soofin Cheng

研究成果: 雜誌貢獻文章同行評審

28 引文 斯高帕斯(Scopus)

摘要

W/Zr mixed oxides supported on various porous silica materials, namely SBA-15, MCM-41 and silica gel, were prepared. Their acidities and 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, and that the surface area and pore volume decreased with the loading. The SBA-15 supported WO 3/ZrO2 materials promoted with Pt were highly catalytic efficient in n-pentane isomerization with a very high iso-pentane selectivity. In contrast, MCM-41 and 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.

原文英語
頁(從 - 到)211-219
頁數9
期刊Applied Catalysis A: General
261
發行號2
DOIs
出版狀態已發佈 - 4月 30 2004
對外發佈

ASJC Scopus subject areas

  • 催化
  • 製程化學與技術

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