Khouw, Charles B. and Davis, Mark E. (1995) Catalytic Activity of Titanium Silicates Synthesized in the Presence of Alkali-Metal and Alkaline-Earth Ions. Journal of Catalysis, 151 (1). pp. 77-86. ISSN 0021-9517. doi:10.1006/jcat.1995.1010. https://resolver.caltech.edu/CaltechAUTHORS:20170710-100105789
Full text is not posted in this repository. Consult Related URLs below.
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20170710-100105789
Abstract
Titanium containing aluminum-free ZSM-5 (TS-1) synthesized in the presence and absence of alkali metal and alkaline earth ions are investigated as catalysts for the selective oxidation of alkanes and alkenes using aqueous H_2O_2 as oxidant at temperatures below 100°C. Sodium-exchanged TS-1 is not active for alkane oxidations. Similarly, no catalytic activity is observed for TS-1 synthesized in the presence of high concentrations of alkali metal ions (Si/Na <20). For both cases, the catalytic activity can be restored by washing the solid with acid solution prior to catalytic evaluation. Similar results are obtained for TS-1 synthesized in the presence of other alkali metal ions, e.g., Li, K. However, the presence of alkaline earth ions, e.g., Mg, in the synthesis gel does not have a significant effect on the catalytic activity of TS-1. Based on the catalytic data and the physicochemical properties of the samples, a plausible explanation for the above results is described. The acid treatment may be useful in overcoming the problems of synthesizing TS-1 from reagents that contain alkali metal ions, e.g., TPAOH solutions. More importantly, this treatment opens the possibility of synthesizing other titanium-containing silicate structures that require the presence of alkali metal ions in the synthesis gel for their formation.
Item Type: | Article | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Related URLs: |
| |||||||||
ORCID: |
| |||||||||
Additional Information: | © 1995 Academic Press. Received April 4, 1994; revised September 2, 1994. Support of this work was provided by the Shell Development Co. and the NSF Alan T. Waterman Award to M. E. D. | |||||||||
Funders: |
| |||||||||
Issue or Number: | 1 | |||||||||
DOI: | 10.1006/jcat.1995.1010 | |||||||||
Record Number: | CaltechAUTHORS:20170710-100105789 | |||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170710-100105789 | |||||||||
Official Citation: | C.B. Khouw, M.E. Davis, Catalytic Activity of Titanium Silicates Synthesized in the Presence of Alkali-Metal and Alkaline-Earth Ions, Journal of Catalysis, Volume 151, Issue 1, January 1995, Pages 77-86, ISSN 0021-9517, https://doi.org/10.1006/jcat.1995.1010. (http://www.sciencedirect.com/science/article/pii/S002195178571010X) | |||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
ID Code: | 78888 | |||||||||
Collection: | CaltechAUTHORS | |||||||||
Deposited By: | Ruth Sustaita | |||||||||
Deposited On: | 10 Jul 2017 17:14 | |||||||||
Last Modified: | 15 Nov 2021 17:43 |
Repository Staff Only: item control page