Unraveling Toluene Conversion during the Liquid Phase Hydrogenation of Cyclohexene (in Toluene) with Rh Hybrid Catalysts

Rufete-Beneite, Mónica; Román-Martı́nez, M.C.

doi:10.3390/catal9120973

Cited by 2 publications

(3 citation statements)

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“…The applied synthesis procedure was based on the sol-gel technique using triethanol amine as a small-size template. The exact synthesis procedure was adapted by the method developed by Hamdy et al in [12,16]. In the exact synthesis procedure, a solution of rhodium (III) nitrate hydrate (Rh(NO 3 ) 3 •xH 2 O, Sigma-Aldrich) was mixed with a dilute solution of triethanol amine (TEA, 97%, ACROS).…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, in a third study Patel et al [15] reported the use of MCM-41 mesoporous siliceous material to support palladium nanoparticles together with monolacunary silicotungstate; the prepared catalyst exhibited a high activity in the hydrogenation of cyclohexene at 80 • C and 10 bar of hydrogen gas pressure. Rhodium-based complexes were applied successfully as very active homogeneous catalysts for cyclohexene hydrogenation [16]. However, limited research was reported to design a heterogeneous catalyst based on Rh nanoparticles as active sites because of the instability of Rh nanoparticles, as reported by Philippot et al [17].…”

Section: Introductionmentioning

confidence: 99%

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Rhodium Nanoparticles Incorporated Mesoporous Silica as an Active Catalyst for Cyclohexene Hydrogenation under Ambient Conditions

et al. 2020

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Rhodium (Rh) nanoparticles were embedded in the mesopores of TUD-1 siliceous material and denoted as Rh-TUD-1. Five samples of Rh-TUD-1 were prepared with different loadings of Rh that ranged from 0.1 to 2 wt% using the sol-gel technique. The prepared samples were characterized by means of several chemical and physical techniques. The obtained characterization results show the formation of highly distributed Rh0 nanoparticles with an average size ranging from 3 to 5 nm throughout the three-dimensional silica matrix of TUD-1. The catalytic activity of the prepared catalysts was evaluated in the solvent-free hydrogenation of cyclohexene to cyclohexane at room temperature using 1atm of hydrogen gas. The obtained catalytic results confirm the high activity of Rh-TUD-1, in which a turn over frequency (TOF) ranging from 4.94 to 0.54 s−1 was obtained. Moreover, the change in reaction temperature during the reaction was monitored, and it showed an obvious increase in the reaction temperature as an indication of the spontaneous and exothermic nature of the reactions. Other optimization parameters, such as the substrate/catalyst ratio, and performing the reaction under non-ambient conditions (temperature = 60 °C and hydrogen pressure = 5 atm) were also investigated. Rh-TUD-1 exhibited a high stability in a consecutive reaction of five runs under either ambient or non-ambient conditions.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rhodium Nanoparticles Incorporated Mesoporous Silica as an Active Catalyst for Cyclohexene Hydrogenation under Ambient Conditions

et al. 2020

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“…The numerical simulation of methane and other reforming alkanes was carried out over the Rh/Al 2 O 3 catalyst in stagnation flows, emphasizing the importance of the impact of internal and external mass transfer [23]. The study of catalytic reactions of hydrogenation, including hydrodeoxygenation, was extended to several aromatics in the gas phase [24] and in liquid medium on Rh-based catalysts [25].…”

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confidence: 99%