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 language | English |
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Pages (from-to) | 281-285 |
Number of pages | 5 |
Journal | Catalysis Letters |
Volume | 83 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - Nov 2002 |
Externally published | Yes |
Keywords
- Butane isomerization
- Ga-promoted sulfated zirconia
- MCM-41
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)