Partial hydrogenation of benzene on Ru catalysts: Effects of additives in the reaction medium

Suppino, Raphael Soeiro; Landers, Richard; Cobo, Antonio José Gomez

doi:10.1016/j.apcata.2012.11.034

Cited by 37 publications

(26 citation statements)

References 15 publications

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“…The increase of the specific surface area on catalysts prepared by wet impregnation has been reported by Suppino et al [26] for supported Ru catalysts. These authors have also observed that catalysts that contained ruthenium hydroxide are more easily reduced than those with chlorine species.…”

Section: Resultsmentioning

confidence: 84%

“…In a recent review, Mäki-Arvela and Murzin [28] stated that usually the metal dispersions are lower in catalysts prepared by incipient impregnation than with wet impregnation. Bu et al [23] and Suppino et al [26] demonstrated that wet impregnation leads to the formation of smaller metal particles in comparison with incipient impregnation for supported Ru catalysts. The activity of these solids on the partial hydrogenation of benzene were also superior, as well as its selectivity to cyclohexene [23,26].…”

mentioning

confidence: 98%

“…Catalysts destined to aromatics hydrogenation may be prepared by many methods, such as sol-gel [3], co-precipitation [4], incipient [18][19][20][21] and wet impregnation [10,[22][23][24][25][26]. According to Savva et al [3], the sol-gel method ensures a better compromise between the dispersion of nickel phase and its interaction with the support surface than co-precipitation and incipient impregnation.…”

mentioning

confidence: 99%

“…It is important to emphasize that very few studies regarding the preparation of base metal catalysts by wet impregnation are found in the literature [1,10], while this method is widely employed to prepare noble metal catalysts [22,23,26] destined to hydrogenation of aromatics.…”

mentioning

confidence: 99%

“…The activation procedure on catalysts prepared by wet impregnation may vary from liquid-phase reduction with NaBH 4 [22] or formaldehyde [26] under mild conditions to high temperature H 2 flow ex situ reduction [3,10,23]. It is noteworthy that depending on the metal nature, extreme reduction conditions may cause sintering leading to a decrease on metal dispersion and catalytic activity [29].…”

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confidence: 99%

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Effects of the activation method on the performance of base metal catalysts prepared by wet impregnation for toluene hydrogenation in liquid phase

Suppino

Landers

Cobo

2014

Reac Kinet Mech Cat

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The present work aims to study the effects of the activation method on the performance of base metal catalysts for toluene hydrogenation in liquid phase. For this, catalysts of Fe, Co and Ni supported on c-Al 2 O 3 were prepared by wet impregnation from chlorinated precursors and reduced by formaldehyde. The prepared catalysts were activated ex situ at 773 K or in situ at 523 K both under H 2 and characterized by N 2 physisorption, SEM ? EDX, TEM, XPS and TPR techniques. Catalytic tests were conducted in a slurry Parr reactor at 373 K under H 2 pressure of 5 MPa. The results indicate the formation of metal hydroxides during the catalysts preparation, which are not reduced by the formaldehyde. The ex situ activation seems able to reduce both hydroxides of Fe and Ni, but there is no evidence of reduction in the case of Co hydroxide. Co and Ni catalysts present higher activities when not activated, whereas the in situ activation increases the activity of the Fe catalyst.

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Section: Resultsmentioning

confidence: 84%

mentioning

confidence: 98%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Effects of the activation method on the performance of base metal catalysts prepared by wet impregnation for toluene hydrogenation in liquid phase

Suppino

Landers

Cobo

2014

Reac Kinet Mech Cat

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Partial Hydrogenation of Benzene

Qiao¹,

Zong²

2023

Industrial Arene Chemistry

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Cu‐Decorated Ru Catalysts Supported on Layered Double Hydroxides for Selective Benzene Hydrogenation to Cyclohexene

Liu

Bing

et al. 2015

ChemCatChem

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The selective hydrogenation of benzene to cyclohexene is of high value for the chemical industry owing to its inexpensive feedstock, atom economy, and operational simplicity. A tunable catalytic behavior towards the selective hydrogenation of benzene was obtained over Cu‐decorated Ru catalysts supported on a layered double hydroxide (denoted as RuxCuy/MgAl‐LDH), reaching a maximum cyclohexene yield of 44.0 % over Ru1.0Cu0.5/MgAl‐LDH at 150 °C and 5.0 MPa without employment of any additives. CO‐TPD (TPD=temperature‐programmed desorption) and in situ CO‐FTIR techniques demonstrated that Cu atoms preferentially deposit on the surface of low‐coordinated Ru atoms in RuxCuy/MgAl‐LDH catalysts, resulting in a low adsorption energy of cyclohexene on the modified sites as revealed by DFT calculations. This work not only gives an understanding of the correlation between the surface exposure of Ru active sites and the resulting selectivity, but also provides a green and additive‐free catalytic process for the selective hydrogenation of benzene.

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Partial hydrogenation of benzene on Ru catalysts: Effects of additives in the reaction medium

Cited by 37 publications

References 15 publications

Effects of the activation method on the performance of base metal catalysts prepared by wet impregnation for toluene hydrogenation in liquid phase

Effects of the activation method on the performance of base metal catalysts prepared by wet impregnation for toluene hydrogenation in liquid phase

Partial Hydrogenation of Benzene

Cu‐Decorated Ru Catalysts Supported on Layered Double Hydroxides for Selective Benzene Hydrogenation to Cyclohexene

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