Zeolite-graphene composite as support for molybdenum-based catalysts and their hydrodesulfurization performance

Ali, Islam; Saleh, Tawfik A.

doi:10.1016/j.apcata.2020.117542

Cited by 44 publications

(18 citation statements)

References 51 publications

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“…[37] The hybrid HDS supported catalysts on different carbon-based zeolitic composites have been investigated. [84][85][86][87] In a view to bring dynamic functionalities to HDS support that will ultimately improve their catalytic efficiency, carbon-based materials have been mixed/prepared with zeolites in the recent times. In a recent study, [84] AC-derived from waste tire rubber was prepared in different loadings to modify zeolite-Y and further used as a support for Co and Mo nanoparticles (NPs).…”

Section: Zeolites-carbonmentioning

confidence: 99%

“…However, their characteristics microporous disordered pore structure and low specific pore volume have hindered their applicability for heavier organosulfur molecules that required large pores for diffusion of reactants and products during the reaction [37] . The hybrid HDS supported catalysts on different carbon‐based zeolitic composites have been investigated [84–87] . In a view to bring dynamic functionalities to HDS support that will ultimately improve their catalytic efficiency, carbon‐based materials have been mixed/prepared with zeolites in the recent times.…”

Section: Hierarchical Hybrid‐based Supportsmentioning

confidence: 99%

“…The structural and textural properties improvements were cited as overall yardsticks for improved performance with DDS dominating the preferred reaction route. Graphene‐based zeolite‐Y hybrid support was prepared and used for HDS activity of DBT over MoCo and MoNi active catalysts, using batch reactor at 300 °C [86] as shown in the Figure 7 scheme. The performance evaluation of graphene‐based catalysts denoted ZGMoCo and ZGMoNi outperformed their corresponding counterparts without graphene (ZMoCo and ZMoNi).…”

Section: Hierarchical Hybrid‐based Supportsmentioning

confidence: 99%

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Hierarchical Hybrid Supports and Synthesis Strategies for Hydrodesulfurization of Recalcitrance Organosulfur Compounds

Ganiyu

2021

Chemistry An Asian Journal

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It is undisputed that there is a paradigm shift in the global trend of crude oil towards being more sour and heavier than usual light sources. Consequently, the hydrotreating activity becomes a bottleneck with high content of S, N, metals and other impurities than expected. On the other hand, the price of petroleum products lately witnessed instability and fell to the lowest average price (<USD 20) in recent times. In the same vein, the regulation to control the emission of toxic compounds in the atmosphere become stricter as promulgated by various policymakers. In this sense, robust hydrotreating catalysts with characteristics efficient catalytic activity, selectivity and stability are highly desirable. Recently, different approaches have been used to improve and cushion the unprecedented effect emanated from economic, social and environmental challenges posed by heavy and sour crude sources, price instability of the refined products and regulation to lower the sulfur to minimum level or zero parts per millions (ppm). Importantly, the role of support in catalysis cannot be over emphasized, whilst the surface area and porosity, mechanical and thermal stability, dispersion of active metals, acidity/basicity have been greatly improved, the increased activity, stability and selectivity has been observed significantly. In this review, hybrid supports based on aluminosilicates (zeolitic types) and other notable supports from recent literatures were explored and discussed for Ni(Co)Mo(W) supported catalysts for hydrodesulfurization (HDS) activity of heavy organosulfur molecules. The emphasis on the hybrid supports’ varied characteristics for HDS of organosulfur molecules, where there are necessities for fast diffusion of reactants and products, better dispersion of MoS2 crystallites, high surface area and pore volume, and increased acidity of the catalysts are greatly emphasized. Furthermore, the progress made so far on different HDS active phases viz. noble metals, metal phosphides, intermetallic silicides, carbides and iron‐zinc are highlighted in this write‐up, irrespective of the support composition in the supported catalysts formulations. The need for application of predictive tools, like machine learning (ML) in the design and development of HDS catalysts, and performance evaluation of HDS activity towards achieving better catalytic operation was briefly highlighted. Finally, the review will serve as a summary of scientific efforts in this regards and bridge a gap for the newcomers to investigate the topic in a better way through proper selection and efficient catalysts design.

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Section: Zeolites-carbonmentioning

confidence: 99%

Section: Hierarchical Hybrid‐based Supportsmentioning

confidence: 99%

Section: Hierarchical Hybrid‐based Supportsmentioning

confidence: 99%

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Hierarchical Hybrid Supports and Synthesis Strategies for Hydrodesulfurization of Recalcitrance Organosulfur Compounds

Ganiyu

2021

Chemistry An Asian Journal

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“…Various methods have been used for the desulfurization of gasoline such as hydrogen desulfurization (HDS) [2][3][4], adsorption desulfurization [5,6], extraction desulfurization [7][8][9], oxidative desulfurization. [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Elimination of dibenzothiophene from n-hexane by nano-composite membrane containing Cu-MOF in a pervaporation process

et al. 2020

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In this study, a particular type of thin film nano-composite membranes was prepared and used in the pervaporation process. The membranes were made of polyphenylsulfone and were coated with a thin layer of polydimethylsiloxane containing different amount of Cu-metal-organic framework (MOF) nano-structures. N-hexane containing dibenzothiophene was used as a model fuel. To characterize MOF and the prepared membranes, Fourier transform infrared, X-Ray diffraction, Brunauer-Emmett-Teller, field-emission scanning electron microscopy, water contact angle measurements, and thermogravimetric analysis were used. The effect of parameters such as sulfur content, process temperature, and Cu-MOF concentration on the membrane performance was evaluated. The results indicated that nano-composite membranes demonstrate a much better performance compared to the untreated membrane. The membrane containing 5 wt% Cu-MOF with a contact angle of 97° had more hydrophilic surface and proved the effect of the additive in improving the surface hydrophilicity. This membrane had the highest rate of flux and rejection (0.4 kg/m 2 h and 70%, respectively), and the lowest enrichment factor (0.3). As the temperature increased, the flux of M 4 membrane (with 5 wt% additive) increased, while the removal efficiency decreased significantly. The optimum temperature for desulfurization in the pervaporation process was obtained (50 °C).

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“…Characterization of immobilized complexesGO, Co-GO, Cu-GO, Zn-GO and Ni-GO had BET surface areas of 616.8, 581.2, 527.1, 485.2 and 448.7 m 2 /g, respectively. The low surface areas indicated the presence of Co-GO, Cu-GO, Zn-GO and Ni-GO within the supercages of the GO structure 19. …”

mentioning

confidence: 99%

MPSC6 binuclear complexes immobilized on graphene oxide for oxidation of lignin model compounds and lignin

Zhou¹,

Zou²,

Yang³

2021

Rev.Roum.Chim.

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An efficient process for the oxidative degradation of lignin using M-GO (MPSC6 binuclear complexes immobilized on graphene oxide) biomimetic catalysts in acetonitrile was developed in this work. Different M-GO catalysts (M=Co, Cu, Zn and Ni) were used to catalyze the depolymerization of lignin model compounds and organosolv lignin. The results showed that the immobilization of MPSC6 complexes on GO was favorable for regulating the valuable depolymerization of the model compounds and lignin. The optimal solid catalyst Co-GO exhibited high catalytic activity, which showed a 83.04% conversion of phenolic β-O-4 lignin model compound, a 91.26% conversion of veratryl alcohol and a 96.24% conversion of vanillyl alcohol with a catalyst/model compound ratio of 50 mg:10 mmol and a dosage of 15 mmol H2O2 at 80 °C for 3 h. The stuctural changes of organosolv lignin occurred in catalytic oxidation were analyzed in terms of O/C ratio, molecular weight and OH content of lignin samples, and a plausible mechanism involving the formation of aromatic products and muconolactone from lignin depolymerization over M-GO was also proposed.

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Zeolite-graphene composite as support for molybdenum-based catalysts and their hydrodesulfurization performance

Cited by 44 publications

References 51 publications

Hierarchical Hybrid Supports and Synthesis Strategies for Hydrodesulfurization of Recalcitrance Organosulfur Compounds

Hierarchical Hybrid Supports and Synthesis Strategies for Hydrodesulfurization of Recalcitrance Organosulfur Compounds

Elimination of dibenzothiophene from n-hexane by nano-composite membrane containing Cu-MOF in a pervaporation process

MPSC6 binuclear complexes immobilized on graphene oxide for oxidation of lignin model compounds and lignin

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