Hybrid TiO2-SiO2 organic/inorganic gels as catalysts for olefin epoxidation

Melissa Buechler-Skoda, Rajinder Gill, David Vu, Chau Nguyen, Gustavo Larsen

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Hybrid TiO2-SiO2 xerogels were treated at different temperatures, and used as olefin epoxidation catalysts. All samples displayed a very high selectivity toward formation of cyclooctene oxide from cis-cyclooctene, in the presence of hydrogen peroxide and methanol. 'All-inorganic' (entirely TEOS-based) preparations are more subject to Ti leaching during reaction than the hybrid materials and as a consequence, they display much poorer activity recovery after recovery and re-use. The higher hydrophobicity of the hybrid samples relative to that of the conventional TiO2-SiO2 alcogel is demonstrated by dynamic adsorption experiments using an oscillating balance reactor.

Original languageEnglish (US)
Pages (from-to)301-310
Number of pages10
JournalApplied Catalysis A: General
Volume185
Issue number2
DOIs
StatePublished - Sep 20 1999

Keywords

  • Adsorption
  • Hybrid gels
  • Olefin epoxidation

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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