NickelMaghrebV1, Main, Merge, bibRecord, 000834

Effect of acidity and metal content on the activity and product selectivity for n-decane hydroisomerization and hydrocracking over nickel-tungsten supported on silica-alumina catalysts

Identifieur interne : 000834 ( Main/Merge ); précédent : 000833; suivant : 000835

Effect of acidity and metal content on the activity and product selectivity for n-decane hydroisomerization and hydrocracking over nickel-tungsten supported on silica-alumina catalysts

Auteurs : Yacine Rezgui [Algérie] ; Miloud Guemini [Algérie]

Source :

Applied catalysis. A, General [ 0926-860X ] ; 2005.

RBID : Pascal:05-0170312

Descripteurs français

Pascal (Inist)
- Acidité, Sélectivité, Décane, Hydrocraquage, Nickel, Tungstène, Catalyseur sur support, Silice, Alumine, Catalyseur, Déparaffinage, Isomérisation, Catalyse hétérogène.
Wicri :
- topic : Nickel, Tungstène.

English descriptors

KwdEn :
- Acidity, Alumina, Catalyst, Decane, Dewaxing, Heterogeneous catalysis, Hydrocracking, Isomerization, Nickel, Selectivity, Silica, Supported catalyst, Tungsten.

Abstract

Ni-W/silica-alumina based catalysts with different nickel and tungsten concentration (nickel ranging from 12 to 17% and tungsten ranging from 8 to 30%) were prepared by sol-gel method. The BET, temperature-programmed desorption of ammonia (TPDA) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) techniques were used to characterize the prepared solids. Afterwards, the catalysts were screened for activity and selectivity in the hydroconversion of n-decane. Under the experimental conditions, yields of isomers as well as cracking products were a function of both metal content and amount of acid sites. Up to 15% Ni content, nickel increased isomerization selectivity, afterwards, the catalytic selectivity decreased. Moreover, the higher the amount of medium acid sites present on the catalyst, the higher its activity and its deactivation. After running on stream for 100 min, the catalysts with 15% of nickel and 10% of tungsten (WT(15,10) catalyst) showed the best results (42.3% of conversion and 55% selectivity) at 250°C.

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Pascal:05-0170312

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acidity</term>
<term>Alumina</term>
<term>Catalyst</term>
<term>Decane</term>
<term>Dewaxing</term>
<term>Heterogeneous catalysis</term>
<term>Hydrocracking</term>
<term>Isomerization</term>
<term>Nickel</term>
<term>Selectivity</term>
<term>Silica</term>
<term>Supported catalyst</term>
<term>Tungsten</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Acidité</term>
<term>Sélectivité</term>
<term>Décane</term>
<term>Hydrocraquage</term>
<term>Nickel</term>
<term>Tungstène</term>
<term>Catalyseur sur support</term>
<term>Silice</term>
<term>Alumine</term>
<term>Catalyseur</term>
<term>Déparaffinage</term>
<term>Isomérisation</term>
<term>Catalyse hétérogène</term>
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<front><div type="abstract" xml:lang="en">Ni-W/silica-alumina based catalysts with different nickel and tungsten concentration (nickel ranging from 12 to 17% and tungsten ranging from 8 to 30%) were prepared by sol-gel method. The BET, temperature-programmed desorption of ammonia (TPDA) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) techniques were used to characterize the prepared solids. Afterwards, the catalysts were screened for activity and selectivity in the hydroconversion of n-decane. Under the experimental conditions, yields of isomers as well as cracking products were a function of both metal content and amount of acid sites. Up to 15% Ni content, nickel increased isomerization selectivity, afterwards, the catalytic selectivity decreased. Moreover, the higher the amount of medium acid sites present on the catalyst, the higher its activity and its deactivation. After running on stream for 100 min, the catalysts with 15% of nickel and 10% of tungsten (WT(15,10) catalyst) showed the best results (42.3% of conversion and 55% selectivity) at 250°C.</div>
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Effect of acidity and metal content on the activity and product selectivity for n-decane hydroisomerization and hydrocracking over nickel-tungsten supported on silica-alumina catalysts

Effect of acidity and metal content on the activity and product selectivity for n-decane hydroisomerization and hydrocracking over nickel-tungsten supported on silica-alumina catalysts

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri