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

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)211-219
Number of pages9
JournalApplied Catalysis A: General
Volume261
Issue number2
DOIs
Publication statusPublished - 2004 Apr 30

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Process Chemistry and Technology

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