期刊
CATALYSIS LETTERS
卷 129, 期 3-4, 页码 478-485出版社
SPRINGER
DOI: 10.1007/s10562-008-9826-5
关键词
V-MCM-41; Non-sodium; Isomerization
资金
- AcRF tier 2 [M45120006 ARC 13/07]
- AcRF tier 1 [M52120049 RG45/06]
A rapid non-sodium process was developed to synthesize highly ordered V-MCM-41 mesoporous materials with atomic level dispersed vanadium species. NH3 center dot H2O instead of NaOH was used to maintain the moderately basic synthesis condition. The characterization results of N-2 physisorption and XRD showed that the synthesized samples had highly ordered hexagonal structure. UV-Vis, UV-Raman, and EPR spectra provided evidence that most vanadium ions were tetrahedrally incorporated into the framework of siliceous MCM-41. The NH3-TPD proved the mild acidity of V-MCM-41 due to the incorporation of vanadium cations. The most important variables were structural order and vanadium loading which can be controlled easily by changing synthesis variables in such a way that collapse of the V-MCM-41structure did not occur. The synthesized V-MCM-41 catalysts successfully catalyzed the isomerization of heptene. High conversion and isomer selectivity were achieved with good catalytic stability. The structure of V-MCM-41 can be well preserved after reaction.
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