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Deactivation phenomena of MoO3/SiO2 and TiO2/SiO2 during transesterification between dimethyl carbonate and phenol
- Source :
-
Applied Catalysis A: General . Mar2009, Vol. 356 Issue 2, p211-215. 5p. - Publication Year :
- 2009
-
Abstract
- Abstract: The catalytic stability of MoO3/SiO2 and TiO2/SiO2, which have been reported to be active for transesterification between dimethyl carbonate and phenol, was examined in a batch reactor for the same reaction. X-ray diffraction (XRD), inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and the temperature programmed oxidation (TPO) were conducted to characterize the catalysts. The gradual decrease in the activity was observed over both catalysts with increasing the number of a batch reaction. The strong adsorption of reactants was observed from the temperature programmed oxidation experiment. The deactivated MoO3/SiO2 can be regenerated after oxidation in air at 823K. However, the deactivated TiO2/SiO2 can be only partially regenerated even after oxidation in air at 973K. Some of the Mo species in MoO3/SiO2 were leached out during a reaction. This dissolved homogeneous Mo species appeared to take part in this reaction. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 0926860X
- Volume :
- 356
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis A: General
- Publication Type :
- Academic Journal
- Accession number :
- 36476997
- Full Text :
- https://doi.org/10.1016/j.apcata.2009.01.008