Preparation of H3PMo12O40 catalyst immobilized on surface modified mesostructured cellular foam (SM-MCF) silica and its application to the ethanol conversion reaction

Heesoo Kim, Ji Chul Jung, Pil Kim, Sung Ho Yeom, Kwan Young Lee, In Kyu Song

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Surface of mesostructured cellular foam (MCF) silica was modified by grafting 3-aminopropyl-triethoxysilane (APTES) to have the positive charge, and thus, to provide sites for the immobilization of H3PMo12O40. By taking advantage of the overall negative charge of [PMo12O40]3-, H3PMo12O40 catalyst was chemically immobilized on the aminopropyl group of surface modified MCF (SM-MCF) silica as a charge matching component. It was revealed that H3PMo12O40 species were finely and molecularly dispersed on the SM-MCF silica via chemical immobilization. In the vapor-phase ethanol conversion reaction, the H3PMo12O40/SM-MCF silica catalyst showed a higher ethanol conversion than the bulk H3PMo12O40 catalyst. Furthermore, the H3PMo12O40/SM-MCF silica catalyst exhibited an enhanced oxidation catalytic activity (formation of acetaldehyde) and a suppressed acid catalytic activity (formation of ethylene and diethylether) compared to the mother catalyst. The enhanced ethanol conversion and oxidation catalytic activity of H3PMo12O40/SM-MCF silica catalyst was attributed to fine dispersion of H3PMo12O40 species on the SM-MCF silica via chemical immobilization.

Original languageEnglish
Pages (from-to)150-155
Number of pages6
JournalJournal of Molecular Catalysis A: Chemical
Volume259
Issue number1-2
DOIs
Publication statusPublished - 2006 Nov 15

Keywords

  • 3-Aminopropyl-triethoxysilane (APTES)
  • Grafting
  • Heteropolyacid catalyst
  • Immobilization
  • Mesostructured cellular foam silica
  • Vapor-phase ethanol conversion reaction

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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