Hydrogenation of aromatics on modified platinum–alumina catalysts

Ali, Abdel-Ghaffar A.; Ali, Laila I.; Aboul-Fotouh, Sameh M.; Aboul-Gheit, Ahmed K.

doi:10.1016/s0926-860x(98)00058-1

Cited by 55 publications

(29 citation statements)

References 24 publications

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“…The pulsed micro-reactor experiments studied with these catalysts included hydrogenation of aromatics (benzene or toluene) 181 , the dehydrogenation of cyclohexane 182 and the hydroconversion of cyclohexene. 183 The catalysts were doped with halogen using ammonium chloride or ammonium fluoride, with an optimum halogen content 38 found to be 3 %.…”

mentioning

confidence: 99%

Metal Redispersion Strategies for Recycling of Supported Metal Catalysts: A Perspective

Morgan¹,

Goguet²,

Hardacre³

2015

ACS Catal.

182

152

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Catalyst deactivation is ultimately inevitable, and one of the processes known to cause deactivation is sintering of metal particles. Consequently, numerous methods to reverse the sintering process by re-dispersing metal nanoparticles have been developed. These methods are discussed in this perspective, and the reported mechanisms of re-dispersion are summarized. Additionally, the longer term practical use of such treatments, and the benefits this can bring, is briefly disclosed.

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mentioning

confidence: 99%

Metal Redispersion Strategies for Recycling of Supported Metal Catalysts: A Perspective

Morgan¹,

Goguet²,

Hardacre³

2015

ACS Catal.

182

152

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“…Obviously, direct reduction method was helpful to reduce the required amount of Pt on the modified catalyst. In addition, although many literatures [29][30][31][32] had reported that Pt/ZSM-5 could catalyze the hydrogenation of aromatic hydrocarbons, the hydrogenation of benzene was not occurred due to that the high temperature and low pressure used in this work was unfavorable for this reaction. As mentioned earlier, calcinations could influence the size of Pt metal particle, which in turn influenced the hydrogenation activity of Pt [20].…”

Section: Pt Modified Hierarchical Zsm-5 Catalysts For Suppressing Thementioning

confidence: 88%

Catalytic Activity of Pt Modified Hierarchical ZSM-5 Catalysts in Benzene Alkylation with Methanol

Zhang

Cen

et al. 2014

Catal Lett

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Hierarchical ZSM-5 zeolite showed an improved performance as compared to conventional ZSM-5 catalysts in the alkylation of benzene with methanol. However, ethylbenzene yet remains as a major problem. In this study, we modified hierarchical ZSM-5 with Pt to evaluate the alkylation of benzene with methanol in a fixed-bed continuous flow reactor. It was found that Pt modified hierarchical ZSM-5 could successfully combine the catalytic advantages of hierarchical ZSM-5 and the high suppression of Pt to ethylbenzene formation. Moreover, employing direct reduction could improve the utilization of Pt by avoiding Pt particles sintering.

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“…Several studies have been performed on hydrogenation, isomerisation and ring opening of aromatics. 75,77,[80][81][82][83][84] Reaction performed by Shimizu et al on benzene hydrogenation and isomerisation using Pt-supported solid acid catalyst at 250°C showed that benzene almost completely converted with all the Pt-supported catalyst. 75 However, reaction without any catalyst and with only sulphated zirconia showed very little hydrogenation.…”

Section: Hydrogenation Of Aromatics To Gasoline Fuelsmentioning

confidence: 99%

“…Studied conducted by Ali et al on benzene and toluene hydrogenation into cyclohexane and methylcyclohexane respectively between 50°C-250°C temperature range was exemplified. 83 The investigated catalyst 0.35% Pt/Al 2 O 3 was modified by using second metals Ir, Rh, Re and U and then treated via chlorination and fluorination with different halogenation contents of 1 wt%, 3 wt% and 6 wt%. The study showed that all the tested catalysts possessed good catalytic activities at ~125°C-150°C temperature range except for Rh which is very active even at room temperature.…”

Section: Hydrogenation Of Aromatics To Gasoline Fuelsmentioning

confidence: 99%