Well-dispersed gallium-promoted sulfated zirconia on mesoporous MCM-41 silica

Wei Wang, Chang Lin Chen, Nan Ping Xu, Song Han, Tao Li, Soofin Cheng, Chung Yuan Mou

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Gallium-promoted sulfated zirconia (SZ) was confined inside pure-silica MCM-41 (abbreviated as SZGa/MCM-41), where the latter served as a host material. It was prepared by direct dispersion of metal sulfate in the as-synthesized MCM-41 materials, followed by thermal decomposition. The SZGa/MCM-41 catalysts were characterized by XRD, N2 adsorption, HRTEM, DRIFT, NH3-TPD, and TPR. The experimental results showed that the ordered porous host structure was still maintained in the catalyst. SZ was in meta-stable tetragonal phase and highly dispersed on the interior surface of MCM-41 even at a high loading of 50wt%. Additionally, a small fraction of SZ nanoparticles on the external surface of MCM-41 was obtained. The catalytic activity of SZGa/MCM-41 was examined in n-butane isomerization. In comparison to SZ/MCM-41 without promoter, the catalytic activities of the Ga-promoted catalysts were greatly improved. The reason proposed for the higher activity of the Ga-promoted catalysts was that Ga enhances the oxidizing ability of the catalysts.

Original languageEnglish
Pages (from-to)281-285
Number of pages5
JournalCatalysis Letters
Volume83
Issue number3-4
DOIs
Publication statusPublished - Nov 2002
Externally publishedYes

Keywords

  • Butane isomerization
  • Ga-promoted sulfated zirconia
  • MCM-41

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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