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| Titel: |
OXIDATIVE DEHYDROGENATION OF n-BUTANE OVER A MgO-SUPPORTED MAGNESIUM VANADATE CATALYST |
| Auteur: |
I.-C. Marcu Adriana Urdă I. Săndulescu |
| Verschenen in: |
Analele Universitatii Bucuresti. Chimie |
| Paginering: | Jaargang XIV (2005) nr. I-II pagina's 57-63 |
| Jaar: |
2005 |
| Inhoud: |
The catalytic and non-catalytic oxidative dehydrogenation of n-butane wereinvestigated. It was found that in the non-catalyzed reaction the n-butane conversion not exceeds4% at 550°C and the selectivities to butenes are significant only at temperatures below 450°C.Oxidative dehydrogenation was examined in the presence of mixed V-Mg-oxide catalystcomprising 24.5% V2O5. It was observed that the catalyst is active and quite selective forbutenes and butadiene at reaction temperatures in the range 450 – 550°C. The selectivity tobutenes decreased and the selectivity to butadiene increased with increasing conversion at550°C. The low apparent activation energy observed (7 kcal.mol-1), suggests that the ratelimitingstep of the reaction is the reoxidation of the catalytic site by diffusion of the latticeoxygen or directly by gas phase oxygen. |
| Uitgever: |
Ars Docendi Publishing House (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 84 van 143 gevonden artikelen
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