Influence of the Si/Al ratio in the hydroisomerization of n-octane over platinum and palladium beta zeolite-based catalysts with or without binder

Lucas, Antonio de; Ramos, María Jesús; Dorado, Fernando; Sánchez, Paula; Valverde, J.L.

doi:10.1016/j.apcata.2005.05.001

Cited by 33 publications

(14 citation statements)

References 34 publications

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“…A decrease in the iso-C 5 /n-C 5 ratio can be observed with increasing Si/Al ratios. This effect was also found by other researchers in the iso-C 4 / n-C 4 ratio for n-octane isomerization using beta zeolite with different Si/Al [23]. Dorado et al [16] also observed a similar trend in the n-butane isomerization.…”

Section: Si/al=25supporting

confidence: 66%

Hydroconversion of n-decane on Pt/HZSM-5 bifunctional catalysts: effect of the Si/Al ratio of the zeolite on selectivities

Soualah

Lemberton

Pinard

et al. 2010

Reac Kinet Mech Cat

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Hydroconversion of n-decane was investigated on a series of platinum loaded ZSM-5 samples with varied Si/Al ratio. It was observed that the catalytic activity of ZSM-5 zeolite catalysts decreased with increasing Si/Al ratios in samples. The isomer selectivity in the platinum catalysts increased with the Si/Al ratio, which can be explained by a better balance between acidic and hydrogenating sites (high nPt/nH ? ratio = 0.3). On this catalyst, the olefinic intermediates formed on Pt come into contact with few acidic sites before encountering a Pt particle again on which they hydrogenate to be transformed into branched isomers. Among the various C 10 isomers, 2-MeC 9 was preferentially formed. On all catalysts, the content of linear products in the carbon number fractions is higher than branched products. This result is interpreted by type C hydrocracking of methylnonanes.

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Section: Si/al=25supporting

confidence: 66%

Hydroconversion of n-decane on Pt/HZSM-5 bifunctional catalysts: effect of the Si/Al ratio of the zeolite on selectivities

Soualah

Lemberton

Pinard

et al. 2010

Reac Kinet Mech Cat

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“…The predominated presence in all the catalysts of iso-butane as cracked product was a consequence of the prevalence of type A b-scission route (tertiary carbenium ion to tertiary), responsible for generating two iso-butane molecules [22]. Monometallic catalysts loading with Ni or Sn yielded a higher selectivity to cracking products than the platinum monometallic catalyst.…”

Section: Hydroisomerization Of N-octanementioning

confidence: 99%

Influence of the Addition of a Second Metal on the Catalytic Performance of Pt-Beta Agglomerated Catalyst in the Hydroisomerization of n-Octane

et al. 2008

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“…Research on the catalytic activation of n-octane was dominated by the non-oxidative activation [4][5][6][7][8][9][10][11][12][13], and when oxygen was used for such activation (usually from air) the focus was on the production of hydrogen, syngas, as well as the short-chain olefins [14][15][16][17][18][19][20]. A common feature in these studies was that the linear octenes and styrene were either not formed or formed in small amounts.…”

Section: Introductionmentioning

confidence: 99%

Dehydrocyclization of n-octane over boron- and barium-doped V-Mg-O catalysts: influence of n-octane/oxygen ratios

Elkhalifa

Friedrich

2016

Appl Petrochem Res

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Boron-and barium-doped vanadium-magnesium oxide catalysts (BVMgO and BaVMgO) were synthesized by the wet impregnation method and were used for the oxidative dehydrogenation of n-octane at different noctane/O 2 molar ratios. The catalysts were characterized by ICP-OES, in situ XRD, 51 V MAS NMR, SEM, EDX and TGA-DSC. The catalytic tests were carried out in a continuous flow fixed bed reactor. The incorporation of boron and barium as dopants into the VMgO system resulted in catalysts with some differences in properties, such as the details of phase transformations, porosity and degree of hydration. The catalytic performance was affected by the strength of the oxidative environment. Moreover, incorporation of barium enhanced the catalytic performance of VMgO, while the addition of boron adversely affected the performance of VMgO over all n-octane/O 2 molar ratios with regard to both activity and oxidative dehydrogenation selectivity.

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Influence of the Si/Al ratio in the hydroisomerization of n-octane over platinum and palladium beta zeolite-based catalysts with or without binder

Cited by 33 publications

References 34 publications

Hydroconversion of n-decane on Pt/HZSM-5 bifunctional catalysts: effect of the Si/Al ratio of the zeolite on selectivities

Hydroconversion of n-decane on Pt/HZSM-5 bifunctional catalysts: effect of the Si/Al ratio of the zeolite on selectivities

Influence of the Addition of a Second Metal on the Catalytic Performance of Pt-Beta Agglomerated Catalyst in the Hydroisomerization of n-Octane

Dehydrocyclization of n-octane over boron- and barium-doped V-Mg-O catalysts: influence of n-octane/oxygen ratios

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