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| Titel: |
EFFECT OF THE MODIFICATION WITH Sn, Zr AND Ce ON THE PHYSICO-CHEMICAL AND CATALYTIC PERFORMANCES OF H-ZSM-5 ZEOLITE |
| Auteur: |
Rodica Zavoianu Adriana Urda Anca Cruceanu E. Angelescu |
| Verschenen in: |
Analele Universitatii Bucuresti. Chimie |
| Paginering: | Jaargang XII (2003) nr. I-II pagina's 325-332 |
| Jaar: |
2003 |
| Inhoud: |
The physico-chemical and catalytic activities of Zr-, Sn- and Ce- modified HZSM-5zeolite catalysts utilised in n-butene conversion were analysed and correlated with the nature ofthe modifying agent. In modified catalysts prepared by impregnation technique, the modifyingelement is found mainly as an oxide on the external surface of the zeolite. Its presence generatesmodifications of the acidity and of the specific surface area of the zeolite. The highest selectivityfor n-butene aromatisation was obtained with the catalyst modified by Sn, which was the elementwith the lowest ionic radius and the highest electronegativity. The modification with Sngenerates the catalyst with the highest surface area and the highest proportion of strong acidsites. |
| Uitgever: |
Ars Docendi Publishing House (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 48 van 143 gevonden artikelen
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