Thermal Behavior Study of the MoVTeNb Oxide Catalyst for Selective Oxidation Process
- School of Science and Technology, Universiti Malaysia Sabah, UMS, Locked Beg No. 2073, 88999 Kota Kinabalu, Sabah (Malaysia)
- Combinatorial Technology and Catalysis Research Centre, Universiti Malaya, UM, 50603, Kuala Lumpur (Malaysia)
Several parameters involved in preparing the multi metal oxide (MMO) catalysts (Mo{sub 1}V{sub 0.3}Te{sub 0.23}Nb{sub 0.12}O{sub x}) for selective oxidation of propane to acrylic acid (AA) were investigated. These included the proper pre-calcined and calcinations atmosphere effect on the performance of the catalysts. It was found that each metal element plays a critical role to the performance of an effective catalyst and also the calcinations under a non-flow inert atmosphere. The characterization results from XRD, SEM, TG and DSC show the important differences depending on the activation procedures of the MoVTeNb oxide catalyst. The XRD analysis is used to identify the phase inventory of the MoVTeNb oxide catalysts. The structure of orthorhombic M1, M2, TeMo{sub 5}O{sub 16}, V{sub 0.95}Mo{sub 0.97}O{sub 5} and Mo{sub 5}O{sub 14} phase was investigated. The orthorhombic M1 phase is the most active and selective phase and is responsible for the major of the efficiently of the best catalyst for selective oxidation process. TGA and DTG allow the identification of the number and types, of reactions involving evaporation of small molecules from removal of ligands and water to condensation or drying processes. From all these analyses it was proven that the activation procedures would affect the performance of the MoVTeNb oxide catalyst.
- OSTI ID:
- 21308685
- Journal Information:
- AIP Conference Proceedings, Vol. 1136, Issue 1; Conference: International conference on nanoscience and nanotechnology 2008, Shah Alam, Selangor (Malaysia), 18-21 Nov 2008; Other Information: DOI: 10.1063/1.3160123; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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