Hydroconversion of cyclohexene using H-ZSM-5 zeolite catalysts promoted via hydrochlorination and/or platinum incorporation

Aboul-Gheit, Ahmed K.; Aboul-Fotouh, Sameh M.; Abdel‐Hamid, S. M.; Aboul-Gheit, Noha A.K.

doi:10.1016/j.molcata.2005.09.024

Cited by 26 publications

(11 citation statements)

References 41 publications

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“…Modification of zeolite Y with potassium species improved the basicity, and these newly formed basic sites could abstract protons from CPD molecules more readily, which leads to the increase of catalytic activity on the methylation of CPD. Besides, the potassium species introduced suppressed acidic sites on parent zeolite that favor the hydrogenation of hydrocarbons [32], hence the HP selectivity over the modified zeolites declined, which is in good agreement with the results from 2-propanol decomposition. The zeolites modified by different base precursors exhibited quite different catalytic activity on CPD methylation, which should be ascribed to their different basicity.…”

Section: Discussionsupporting

confidence: 86%

Generating Basic Sites on Zeolite Y by Potassium Species Modification: Effect of Base Precursor

et al. 2009

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The zeolite Y was modified by a series of potassium compounds including KNO 3 , K 2 CO 3 , KHCO 3 , KOH, and KF. The obtained microporous materials exhibited quite different structural and basic properties. Such differences can be attributed to their different guest-host interaction. These materials displayed different catalytic activity on the vapor phase methylation of cyclopentadiene with methanol. The activity is well correlated with the basicity and surface areas of catalysts.

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Section: Discussionsupporting

confidence: 86%

Generating Basic Sites on Zeolite Y by Potassium Species Modification: Effect of Base Precursor

et al. 2009

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“…The data show that the HCl-treated Pt and Pd/H-ZSM-5 catalysts possess higher dehydrogenation activities compared to the untreated or HFcontaining catalysts, which is found to be primarily attributed to enhancing the metal dispersion (Table 1). Aboul-Gheit et al (2005) found that the doping of 3% HCl in H-ZSM-5 zeolite-enhanced the acid sites number and strength, whereas its doping in Pt/H-ZSM-5 enhanced acid sites number as well as Pt dispersion. They also found that the overall hydronversion of cyclohexene and its hydrogenation to CH as well as dehydrogenation to benzene were enhanced via incorporating Pt or doping with HCl.…”

Section: Dehydrogenation Of Ch To Benzenementioning

confidence: 96%

Reactions of Cyclohexane on Platinum, Palladium, or Iridium-loaded H-ZSM-5 Zeolite Hydrohalogenated Catalysts

Aboul-Gheit

Awadallah

Abdel‐Hamid

et al. 2011

Petroleum Science and Technology

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The catalytic hydroconversion of cyclohexane using catalysts containing H-ZSM-5 zeolite loaded with 0.35 wt% platinum, palladium, or iridium was studied in a pulse-type microreactor/GC system at atmospheric pressure. These catalysts were also either doped with 3.0% of HCl or HF. The activities of these catalysts and the distribution of the products formed were found to depend on the dispersion of the metallic component as well as on the acidity, acid sites number, and strength in the catalysts. TPD of ammonia and hydrogen chemisorption were applied to evaluate acid site strength distribution and metals dispersion, respectively, in the catalysts. In case of the Pt-and Pd-containing catalysts, hydrochlorination enhanced the isomerization and dehydrogenation activities and selectivities of cyclohexane, but decreased its hydrocracking activity. However, catalyst hydrofluorination resulted in the reverse effects. Nevertheless, for the Ir-loaded catalyst, both hydrohalogenation treatments decreased the isomerization and dehydrogenation of cyclohexane. The Ir/H-ZSM-5 catalyst exhibited higher hydrogenolysis activities than did those acquired by the Ptand Pd-containing catalysts.

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“…Doping H-ZSM-5 with a low concentration of Ffollowed by thermal activation enhances surface acidity by the formation of new Brönsted acid sites and the strengthening of other acid sites on the parent zeolite [25][26][27]. The aim of our work is to evaluate different mordenite (MOR) zeolites (H-MOR, NH 4 -MOR, and Na-MOR) and study the effect of doping H-MOR with 3.0 wt% HCl, HF, NH 4 Cl, and NH 4 F to visualize this effect on methanol conversion in a flow reactor that operates in a flow of argon at temperatures of 100-300 °C.…”

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confidence: 99%

Conversion of Methanol Using Modified H-MOR Zeolite Catalysts

Aboul-Fotouh¹,

Aboul-Gheit²,

Hassan³

2011

Chinese Journal of Catalysis

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Hydroconversion of cyclohexene using H-ZSM-5 zeolite catalysts promoted via hydrochlorination and/or platinum incorporation

Cited by 26 publications

References 41 publications

Generating Basic Sites on Zeolite Y by Potassium Species Modification: Effect of Base Precursor

Generating Basic Sites on Zeolite Y by Potassium Species Modification: Effect of Base Precursor

Reactions of Cyclohexane on Platinum, Palladium, or Iridium-loaded H-ZSM-5 Zeolite Hydrohalogenated Catalysts

Conversion of Methanol Using Modified H-MOR Zeolite Catalysts

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