CATEGORY:
ETHYLENE TO PROPENE
Molybdenum containing cage like mesoporous KIT-5 for enhanced catalytic conversion of 1-butene and ethylene to propene
Molybdenum containing cage like mesoporous KIT-5 for enhanced catalytic conversion of 1-butene and ethylene to propene
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Type
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Journal
Article
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Author
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Kai
Tao
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Author
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Qingxiang
Ma
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URL
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Volume
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416
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Pages
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39-46
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Publication
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Journal
of Molecular Catalysis A: Chemical
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Date
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May
15, 2016
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Abstract
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Researchers prepared molybdenum containing three-dimensional (3D) cage-like mesoporous KIT-5 (Mo-KIT-5) materials with a variety of Si/Mo ratios using one-pot hydrothermal synthesis. Characterization results revealed that molybdenum species could be finely dispersed in the framework of KIT-5 without disturbing long-range ordering at Si/Mo ratios higher than 15, while collapse of mesoporous structure and presence of bulk MoO3 was observed for Mo-KIT-5-5 sample with a Si/Mo ratio of 5. They studied Mo-contained materials in catalytic conversion of 1-butene and ethylene to propene. Among all of Mo-KIT-5 materials studied, Mo-KIT-5-40 with Si/Mo ratio of 40 exhibited best catalytic performance caused by the fact that it processed superior textural properties, substantial active Mo species, and appropriate amount of acidic sites. Further decreasing the Si/Mo ratio resulted in declined activity due to the presence of extraframework Mo species. Researchers observed that doped Mo-KIT-5-40 showed better catalytic activity than control supported Mo/KIT-5-40 and Mo/SiO2-40 catalysts with same Mo loading due to the highly dispersed active Mo species on the mesoporous framework. In additon, Mo-KIT-5 was superior to other Mo containing mesoporous materials, such as Mo-SBA-15 with two-dimensional pores and Mo-KIT-6 with three-dimensional cylindrical pores, implying the advantage of this kind of ordered 3D cage-like mesoporous materials in this reaction. |
