Catalytic properties of H2-reduced MoO3 with noble metal for the conversions of heptane and propan-2-ol

被引:34
作者
Uchijima, F [1 ]
Takagi, T [1 ]
Itoh, H [1 ]
Matsuda, T [1 ]
Takahashi, N [1 ]
机构
[1] Kitami Inst Technol, Dept Mat Sci, Kitami, Hokkaido 0908507, Japan
关键词
D O I
10.1039/a908794j
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Effects of H-2 reduction on the catalytic properties of MoO3 with Pt, Pd, Rh, Ir, or Ru for the conversions of heptane and propan-2-ol were studied. The catalytic activity of MoO3 with noble metal for the isomerization of heptane was strongly dependent on the period of H-2 reduction at 623 K. This behavior was almost the same as that of MoO3 without noble metal. Among the catalysts tested, Pt/MoO3 was the most active for this reaction. The catalytic activities of MoO3 for dehydration and dehydrogenation of propan-2-ol also increased in proportion with the period of H-2 reduction. In the case of MoO3 with noble metal, a higher dehydration activity was obtained by a longer period of H-2 reduction, while the dehydrogenation activity was almost independent of the reduction period. Pt/MoO3 exhibited a high dehydration activity compared with the other catalysts, indicating the most acidic property of Pt/MoO3. We conclude from these results that the high isomerization activity of Pt/MoO3 can be attributed to its high acidity as well as to the hydrogenative and dehydrogenative properties of Pt metal.
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页码:1077 / 1083
页数:7
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