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Catalytic reforming of n-heptane on platinum-tungsten supported on gamma-alumina
Abstract The mono-metallic and bi-metallic catalysts have been prepared by impregnating with solutions containing a compound of H2PtCl6, WO3 and 1 ml HCl (0.1 mol). It should be noted that the catalysts’ activity and selectivity have been determined under these conditions: 450–500°C, and 15–25 atm by H2. For converting n-heptane, the molar ratio H2/C7H16 is 5, and LHSV is 1.5 ml/h. It has been proved that, under these experimental conditions, the conversion of n-heptane into branched aliphatic isomers is catalyzed by a bifunctional mechanism. The results indicate that in the presence of W, the catalysts have much higher selectivity and stability for isomerization reaction. At a given conversion, the bi-metallic catalysts produce much lower concentrations of cracked products. According to the tests, W modifies the support acidity resulting to the higher selectivity for isomerization and the lower one for cracking, and it also modifies the Pt properties.
Catalytic reforming of n-heptane on platinum-tungsten supported on gamma-alumina
Abstract The mono-metallic and bi-metallic catalysts have been prepared by impregnating with solutions containing a compound of H2PtCl6, WO3 and 1 ml HCl (0.1 mol). It should be noted that the catalysts’ activity and selectivity have been determined under these conditions: 450–500°C, and 15–25 atm by H2. For converting n-heptane, the molar ratio H2/C7H16 is 5, and LHSV is 1.5 ml/h. It has been proved that, under these experimental conditions, the conversion of n-heptane into branched aliphatic isomers is catalyzed by a bifunctional mechanism. The results indicate that in the presence of W, the catalysts have much higher selectivity and stability for isomerization reaction. At a given conversion, the bi-metallic catalysts produce much lower concentrations of cracked products. According to the tests, W modifies the support acidity resulting to the higher selectivity for isomerization and the lower one for cracking, and it also modifies the Pt properties.
Catalytic reforming of n-heptane on platinum-tungsten supported on gamma-alumina
Vadi, Mehdi (Autor:in) / Safavi, Atefeh (Autor:in) / Jamshidi, Ali (Autor:in) / Refinery, Shiraz (Autor:in)
Petroleum Chemistry ; 49 ; 521-524
01.11.2009
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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| Taylor & Francis Verlag | 2015