High-dispersed Ni-Mo-S active phases within hierarchical pore materials by introducing the cationic protective shell during the impregnation process for hydrodesulfurization

Hu, Di; Li, Yuyang; Mei, Jinlin; Wang, Gang; Xiao, Chengkun; Liu, Cong; Meng, Qian; Li, Huiping; Fu, Siyuan; Duan, Aijun

doi:10.1016/j.fuel.2019.116701

Cited by 26 publications

(14 citation statements)

References 37 publications

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“…The soft template-assisted synthesis, especially with surfactants, is mostly used for preparing HZs than for designing the efficient HDS catalysts. ,,,,,,,,,,,,,,,,,,− This is because the structure of soft templates can be controlled by changing their functional groups or by tuning the packing parameter, which in turn offers a versatile way to fabricate the mesopores . The postmodification strategies such as demetalation, ,,, compaction method (extrusion ,, and granulation), and steaming are occasionally reported for preparing the HZs, which are subsequently used in designing efficient HDS catalysts.…”

Section: Zeolite-based Hds Catalystsmentioning

confidence: 99%

“…Regarding the above-discussed pure HZs, both the mesoporosity and acidity are contributed by the pure zeolite framework structure. Differently, in the composite HZs, the zeolite provides the acidity whereas the mesoporosity is offered by the other mesoporous materials, especially mesoporous silica. ,,,,,,,,,,− ,,− , However, in a few cases, the pure HZs are physically mixed with the other supports like Al 2 O 3 to produce the composite HZs . The benefits ascribed to the above pure HZs are also expected while employing the composite HZs for preparing HDS catalysts.…”

Section: Zeolite-based Hds Catalystsmentioning

confidence: 99%

“…The composite HZs possessing the mesoporous silica framework is very much intrigued owing to the fact that mesoporous silicas can be prepared with different textural properties and morphologies simply by varying the organic template, which might influence the activity of HDS catalysts derived from such composite HZs. Taking advantage of this and the availability of different microporous zeolites, Duan and co-workers have extensively prepared a variety of composite HZs, and utilized the same for making HDS catalysts. ,,,,,,,,− ,,− , They have adapted a common synthetic strategy for preparing the composite HZs that possess zeolite and mesopore silica (Figure a). The preprepared zeolite seeds are mixed with the precursor gel of mesoporous silica (organic template, HCl, and TEOS).…”

Section: Zeolite-based Hds Catalystsmentioning

confidence: 99%

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Review on Hydrodesulfurization over Zeolite-Based Catalysts

Cui

Antony

Fan

et al. 2021

Ind. Eng. Chem. Res.

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Concerning the environmental and health problems related to SO x emission, the environmental protection agencies are incessantly tightening the permissible sulfur level in fuels such as gasoline and diesel. This gives a greater challenge for the traditional hydrodesulfurization (HDS), which is quite inefficient for removing refractory sulfur (RS) compounds (e.g., 4,6-dimethyldibenzothiophene). Consequently, the new efficient HDS catalysts for substituting the industrial HDS catalysts (Ni(Co)Mo/Al2O3) have received much attention. Zeolite-containing HDS catalysts are of particular importance because zeolites could alleviate the HDS of RS compounds via isomerization and cracking abilities of their Brønsted acid sites. The microporous zeolites slow down the diffusion of reactants and products, leading to uncontrolled cracking reactions that promote the coke formation and thus deactivate the HDS catalysts. Therefore, the application of zeolite-based catalysts was limited for HDS reactions in the early years. But, due to the introduction of hierarchical porous structure in zeolites, the cracking reactions catalyzed by strong Brønsted acid sites are controlled and uninterrupted molecular diffusion becomes highly possible. As a sequel, a better selectivity and improved HDS efficiency are attainable without any coke formation or with a reduced coke formation. Besides the porosity and acidity of zeolites, the synthetic methods and precursors of zeolite-based HDS catalysts and the mixing of zeolites with other supports like Al2O3 have impacts on the efficiency of zeolite-based HDS catalysts. In this review, all these factors are discussed along with the preparation methods of hierarchical zeolites and tuning methods of zeolite acidity. The process and catalyst details of traditional HDS are briefly explained at the outset. The types of metal active component present in various zeolite-based HDS catalysts and how their properties are influenced by zeolites are also summarized.

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Section: Zeolite-based Hds Catalystsmentioning

confidence: 99%

Section: Zeolite-based Hds Catalystsmentioning

confidence: 99%

Section: Zeolite-based Hds Catalystsmentioning

confidence: 99%

See 1 more Smart Citation

Review on Hydrodesulfurization over Zeolite-Based Catalysts

Cui

Antony

Fan

et al. 2021

Ind. Eng. Chem. Res.

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“…FDU-12 is a type of 3D mesoporous material with a cage-like face-centered cubic mesostructure which has been attracted increasing attention as supports for HDS in recent years (Hu et al 2020;Meng et al 2018;Wu et al 2018b;Li et al 2018bLi et al , 2019Liu et al 2016Liu et al , 2017Wang et al 2017;Zhang et al 2017;Du et al 2016). For example, FDU-12based micro-and mesoporous composites (Wu et al 2018b;Li et al 2018b;Du et al 2016), Ti-or Zr-modified FDU-12 (Meng et al 2018;Cao et al 2014), etc.…”

Section: Introductionmentioning

confidence: 99%

Effects of pore size, mesostructure and aluminum modification on FDU-12 supported NiMo catalysts for hydrodesulfurization

et al. 2020

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A series of NiMo/FDU-12 catalysts with tunable pore diameters and mesostructures have been controllably synthesized by adjusting the synthetic hydrothermal temperature and applied for the hydrodesulfurization of dibenzothiophene and its derivative. The state-of-the-art electron tomography revealed that the pore sizes of FDU-12 supports were enlarged with the increase in the hydrothermal temperature and the mesostructures were transformed from ordered cage-type pores to locally disordered channels. Meanwhile, the MoS 2 morphology altered from small straight bar to semibending arc to spherical shape and finally to larger straight bar with the change of support structures. Among them, FDU-12 hydrothermally treated at 150 °C possessed appropriate pore diameter and connected pore structure and was favorable for the formation of highly active MoS 2 with curved morphology; thus, its corresponding catalyst exhibited the best HDS activity. Furthermore, it was indicated that the isomerization pathway could be significantly improved for HDS of 4,6-dimethyldibenzothiophene after the addition of aluminum, which was expected to be applied to the removal of the macromolecular sulfur compounds. Our study sheds lights on the relationship between support effect, active sites morphology and HDS performance, and also provides a guidance for the development of highly active HDS catalysts.

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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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High-dispersed Ni-Mo-S active phases within hierarchical pore materials by introducing the cationic protective shell during the impregnation process for hydrodesulfurization

Cited by 26 publications

References 37 publications

Review on Hydrodesulfurization over Zeolite-Based Catalysts

Review on Hydrodesulfurization over Zeolite-Based Catalysts

Effects of pore size, mesostructure and aluminum modification on FDU-12 supported NiMo catalysts for hydrodesulfurization

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

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