Synthesis and characterization of Cu(II) and Co(II) encapsulated metal complexes in zeolite-Y for the oxidation of phenol and benzene

Akinlolu, Kayode; Omolara, Bamgboye; Kehinde, Oladele Joseph; Shailendra, Tripathi; Kumar, M. Pradeep

doi:10.1088/1757-899x/509/1/012061

Cited by 4 publications

(4 citation statements)

References 29 publications

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“…The original structure of the Y zeolite is not affected by the copper ion-exchanged process. It is possible that copper exists in both types to be copper ions in the zeolite Y network and partly in the type of CuO dispersed on the surface of zeolite Y [16,19].…”

Section: Characterization Of Catalytic Materialsmentioning

confidence: 99%

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Vanillin conversion by aldol condensation using hydrotalcite Mg-Al and modified-Y zeolite as heterogeneous catalysts

Thai¹,

Thư²

2021

Vietnam J. Sci. Technol.

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Mg-Alhydrotalcite, MgO-Al2O3 mixed oxides and modified-Y zeolite (sulfated Y zeolite and copper ion-exchanged Y zeolite) were prepared and characterized by XRD, EDX and XRF techniques. These materials were used as heterogeneous catalysts in aldol condensation of vanillin and acetone.The obtained results showed that the heterogeneous acid catalysts as modified-Y zeolites were more effective than the heterogeneous base catalysts as hydrotalcite Mg-Al and MgO-Al2O3 mixed oxides in aldol condensation reaction of vanillin. The highest conversion of vanillin was 95.5% when the reaction was carried out at 120oC in 5 hours, using sulfated Y zeolite.

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Section: Characterization Of Catalytic Materialsmentioning

confidence: 99%

“…The weight of Cu in reused A1 catalyst is 0.91 %. So, a very small amount of Cu is decreased due to the leaching of CuO on surface of the catalyst after the reaction [16,19].…”

Section: Characterization Of Catalytic Materialsmentioning

confidence: 99%

Vanillin conversion by aldol condensation using hydrotalcite Mg-Al and modified-Y zeolite as heterogeneous catalysts

Thai¹,

Thư²

2021

Vietnam J. Sci. Technol.

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“…(2) The catalyst can easily be separated from the admixture of reaction by applying an exterior magnet. The ability to direct transformation of benzene to phenol is a likable and would be viewed by a lot of investigators [23][24][25][26][27][28]. Hydrogen peroxide is a highly green oxidant due to by-products are environmentally friendly as studied by many researchers [29][30][31].…”

Section: Spinelmentioning

confidence: 99%

EVALUATION OF CATALYTIC IMPLEMENTATION OF SPINEL CoFe2O4LOADED NaY IN DIRECT HYDROXYLATION OF BENZENE TO PHENOL

El-Zomrawy

Thabet

2019

Al-Azhar Bulletin of Science

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Spinel cobalt ferrite CoFe2O4 was synthesized and in situ incorporated onto the porous structure of NaY zeolite by the co-precipitation process. The structural design of CoFe2O4/NaY composite was advantageous in terms of activity and stability. Various techniques were utilized to characterize the catalysts like X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and pore structure analysis by N2 adsorption at 77 K. It has been found that spinal CoFe2O4 in CoFe2O4/NaY was sparse on the NaY surface, along with the relevant species inside the zeolite pores. The SEM surface morphology suggests that CoFe2O4 has an irregular structure of large aggregated crystals, whereas CoFe2O4/NaY exhibited predominantly a uniform spherical-like morphology of smaller particle sizes and small cavities on the external surface. The direct hydroxylation of benzene with H2O2 as a green oxidant was inspected. The effects of the amount of test dose of the CoFe2O4/NaY catalyst, concentration of H2O2, and the reaction temperature were studied. Higher yield of phenol was obtained with increasing the concentration of H2O2, catalyst dose and temperature. The kinetics of the hydroxylation of benzene to phenol has shown that the catalyst dose was highly affected reaction rate. The Arrhenius relationship was applied to determine the activation energy of the reaction to be 25.98 kJ/Mol.

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“…The prepared catalysts were reused three times with almost no change in catalytic activity. Cobalt encapsulated metal complex afforded the best catalytic activity [169].…”

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confidence: 99%

Zeolites and Related Materials as Catalyst Supports for Hydrocarbon Oxidation Reactions

et al. 2022

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Catalytic oxidation is a key technology for the conversion of petroleum-based feedstocks into useful chemicals (e.g., adipic acid, caprolactam, glycols, acrylates, and vinyl acetate) since this chemical transformation is always involved in synthesis processes. Millions of tons of these compounds are annually produced worldwide and find applications in all areas of chemical industries, ranging from pharmaceutical to large-scale commodities. The traditional industrial methods to produce large amounts of those compounds involve over-stoichiometric quantities of toxic inorganic reactants and homogeneous catalysts that operate at high temperature, originating large amounts of effluents, often leading to expensive downstream processes, along with nonrecovery of valuable catalysts that are loss within the reactant effluent. Due to the increasingly stringent environmental legislation nowadays, there is considerable pressure to replace these antiquate technologies, focusing on heterogeneous catalysts that can operate under mild reactions conditions, easily recovered, and reused. Parallelly, recent advances in the synthesis and characterization of metal complexes and metal clusters on support surfaces have brought new insights to catalysis and highlight ways to systematic catalysts design. This review aims to provide a comprehensive bibliographic examination over the last 10 years on the development of heterogeneous catalysts, i.e., organometallic complexes or metal clusters immobilized in distinct inorganic supports such as zeolites, hierarchical zeolites, silicas, and clays. The methodologies used to prepare and/or modify the supports are critically reviewed, as well as the methods used for the immobilization of the active species. The applications of the heterogenized catalysts are presented, and some case-studies are discussed in detail.

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Synthesis and characterization of Cu(II) and Co(II) encapsulated metal complexes in zeolite-Y for the oxidation of phenol and benzene

Cited by 4 publications

References 29 publications

Vanillin conversion by aldol condensation using hydrotalcite Mg-Al and modified-Y zeolite as heterogeneous catalysts

Vanillin conversion by aldol condensation using hydrotalcite Mg-Al and modified-Y zeolite as heterogeneous catalysts

EVALUATION OF CATALYTIC IMPLEMENTATION OF SPINEL CoFe2O4LOADED NaY IN DIRECT HYDROXYLATION OF BENZENE TO PHENOL

Zeolites and Related Materials as Catalyst Supports for Hydrocarbon Oxidation Reactions

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