Surface Characteristics and Catalytic Oxidation of CO on Silicalites and Silicalites Containing Cobalt, Copper and Silver Oxides
Two silicalite samples, S 1 and S 2 , were prepared hydrothermally in the presence of tetrapropylammonium bromide (TPA–Br) and tetrabutylammonium bromide (TBA–Br), respectively. Cobalt oxide, copper oxide or silver oxide (all at 10 wt% concentration) were incorporated into the S 1 and S 2 silicalite...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2001-05-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617011494178 |
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| Summary: | Two silicalite samples, S 1 and S 2 , were prepared hydrothermally in the presence of tetrapropylammonium bromide (TPA–Br) and tetrabutylammonium bromide (TBA–Br), respectively. Cobalt oxide, copper oxide or silver oxide (all at 10 wt% concentration) were incorporated into the S 1 and S 2 silicalites by impregnation methods. The structural and textural properties of the prepared samples were studied using a variety of techniques together with their ability to catalyze the oxidation of CO. The results obtained indicated that S 1 and S 2 existed as pure phases with structures analogous to those of ZSM-5 and ZSM-11 zeolites, respectively. Electron microscopic analysis showed that the crystalline morphology of S 1 and S 2 consisted of intergrown discs and shelf-like shapes with diameters in the range 10–15 μm and 29–33 μm, respectively. Differences noted during kinetic studies of CO oxidation over the prepared samples were discussed. |
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| ISSN: | 0263-6174 2048-4038 |