摘要
Alumina-promoted sulfated zirconia was supported on mesoporous molecular sieves of pure-silica MCM-41 and SBA-15. The catalysts were prepared by "direct impregnation" of metal sulfate onto the as-synthesized MCM-41 and SBA-15 materials, followed by solid state dispersion and thermal decomposition. Measurements of XRD and nitrogen adsorption isotherms showed that the structures of resultant materials retain well-ordered pores, even with ZrO2 loading as high as 50 wt%. The characterization results indicated that most of the promoted sulfated zirconia were well dispersed on the internal surface of the ordered mesopores. The catalytic behavior of the alumina-promoted sulfated zirconia supported on mesoporous silica was studied in n-butane isomerization. The supports of mesoporous structures led to high dispersion of sulfated zirconia in the meta-stable tetragonal phase, which was the catalytic active phase. The high performance of alumina-promoted catalysts was ascribed to the sulfur retention by alumina.
原文 | 英語 |
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頁(從 - 到) | 223-229 |
頁數 | 7 |
期刊 | Catalysis Letters |
卷 | 78 |
發行號 | 1-4 |
DOIs | |
出版狀態 | 已發佈 - 3月 2002 |
對外發佈 | 是 |
ASJC Scopus subject areas
- 催化
- 一般化學