Catalytic Properties of Alumina-Supported Ruthenium, Platinum, and Cobalt Nanoparticles towards the Oxidation of Cyclohexane to Cyclohexanol and Cyclohexanone

Rekkab-Hammoumraoui, Ilhem; Choukchou‐Braham, Abderrahim

doi:10.9767/bcrec.13.1.1226.24-35

Cited by 6 publications

(2 citation statements)

References 44 publications

(50 reference statements)

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“…The production of high-purity cyclohexane follows a two-stage scheme: in the 1 st stage, used Ni on the carrier (30-45% Ni/Al 2 O 3 ); In the 2 nd stage, Pt catalysts are used on the carrier (0.2-1.0% Pt/ Al 2 O 3 ). As a result, cyclohexane is obtained with a purity of 99.6-99.9% [64].…”

Section: Process Methods and Acquired Patentsmentioning

confidence: 99%

The Scientific Basis of Industrial Application of the Process of Selective Hydrogenation of Benzene in Different Catalytic Systems

Shikhverdieva,

Mammedova,

Zeynalov

2023

AChJ

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Pollution of the environment with substances obtained in the production of oil and other products in various industries forces us to take measures to solve environmental problems that have become relevant in recent years. Arenes, belonging to the class of petroleum-derived aromatic hydrocarbons, are very life-threatening substances due to their carcinogenic effects. In this regard, one of the important issues is the release of benzene, a special representative of arenes, from its carcinogenic effect as a toxic and volatile compound, and its use in the production of cyclohexane, which is the main raw material for the production of caprolactam and nylon. The selectivity of the hydrogenation of benzene and the high yield of cyclohexane, the target product, depend on the reaction conditions and the choice of catalysts. In recent years, the application of polymer and zeolite nanocomposite catalysts, as well as modified metal polymer-based catalysts, in obtaining highly active and selective catalysts for the purpose of effective implementation of aromatic hydrocarbon hydrogenation processes is of great interest. Thus, naphthenic hydrocarbons are considered the main starting materials for the synthesis of various classes of compounds. Derivatives of these compounds are used in the pharmaceutical industry as special-purpose caprolactam, adipic acid, cyclohexanone, as a solvent for essential oils, varnishes, paints, as an extractant, etc. are used in synthesis. As a result of investigating the catalytic properties of polymer-mineral catalysts in the benzene hydrogenation reaction, it was determined that these reactions show selectivity in the direction of cyclohexane formation in narrow-pore zeolites (mordenite, clinoptilolite)In the presented work, the main information was collected by analyzing the literature on the work carried out in this direction

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Section: Process Methods and Acquired Patentsmentioning

confidence: 99%

The Scientific Basis of Industrial Application of the Process of Selective Hydrogenation of Benzene in Different Catalytic Systems

Shikhverdieva,

Mammedova,

Zeynalov

2023

AChJ

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“…Goodman [12] studied the catalytically active Au on TiO2, he found that strong metal-support interaction leads to the suppression of hydrogen (H2) and carbon monoxide (CO) chemisorptions for various metal and for active Au/TiO2 catalyst CO chemisorptions is enhanced due to electron transfer from TiO2 to Au. Catalytic properties of alumina supported ruthenium (Ru), platinum (Pt), and cobalt (Co) nanoparticles was also investigated by Rekkab-Hammoumraoui and Choukchou-Braham [13], they concluded that the support, the noble and the non-noble metals can be active for oxidation of cyclohexane and they found that Ru and Pt are in metallic form whereas Co is in the oxides form.…”

Section: Introductionmentioning

confidence: 99%

Effects of Calcination Temperatures on The Catalytic Activities of Alumina Supported Cobalt and Chromium Catalysts

Mardwita

Yusmartini

Wisudawati

2019

Bull. Chem. React. Eng. Catal.

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Catalysts properties are important for catalytic reactions. The interaction between support and metal in a catalyst is resulted from catalyst preparation. In this study, gamma-alumina (Al2O3) supported cobalt (Co) and chromium (Cr) catalysts were prepared by impregnation method and calcined at two different temperatures, they are 400 °C for 4 hours and 800 °C for 4 hours. The resulted catalysts contained 10 wt.% of metal and denoted as Co/Al2O3(400), Co/Al2O33(800), Cr/Al2O3(400), and Cr/Al2O3(800) catalysts. The surface and state of the catalysts were examined by using x-ray diffraction (XRD), x-ray photoelectron spectrometer (XPS) and transmission electron microscopy (TEM). The XRD result reveals that strong interaction between Co and Al2O3 due to a formation of higher cobalt oxide. The XRD result further indicates aggregation and strong support metal interaction between Co and Al2O3 during calcination. On the other hand, TEM result showed that large Co particle was observed on Al2O3. The Cr/Al2O3 catalysts were characterized by using XPS. The XPS results showed that Cr/Al2O3(800) catalyst was dominated by Cr 6+ species at binding energy 579.04 eV, indicating high dispersion of Cr on Al2O3. Moreover, Cr metal particle was not observed on XRD and TEM image. All the characterization results provide information that the impregnated metal on Al2O3 showed different properties. Co metal particle tends to be more oxidized and formed large particle, however it was not observed on Cr metal particle.A catalyst contains two or more important compositions; they are a metal, a promoter, and a support. The metal is usually dispersed on a support to obtain a high surface area of an active metal. The catalytic property of the metal mainly depends on the interaction between metal and support. Therefore, metal-support interaction is important for the final catalysts properties. Some supports such as alumina (Al2O3),

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Hydrogen production from aqueous-phase reforming of polyols over Ru/Al2O3 catalyst in a fixed-bed reactor

Kalekar,

Vaidya

2024

Journal of the Indian Chemical Society

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Catalytic Properties of Alumina-Supported Ruthenium, Platinum, and Cobalt Nanoparticles towards the Oxidation of Cyclohexane to Cyclohexanol and Cyclohexanone

Cited by 6 publications

References 44 publications

The Scientific Basis of Industrial Application of the Process of Selective Hydrogenation of Benzene in Different Catalytic Systems

The Scientific Basis of Industrial Application of the Process of Selective Hydrogenation of Benzene in Different Catalytic Systems

Effects of Calcination Temperatures on The Catalytic Activities of Alumina Supported Cobalt and Chromium Catalysts

Hydrogen production from aqueous-phase reforming of polyols over Ru/Al2O3 catalyst in a fixed-bed reactor

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