Monodispersed dendritic mesoporous silica/carbon nanospheres with enhanced active site accessibility for selective adsorptive desulfurization

Liu, Cong; Yuan, Pei; Duan, Aijun; Mei, Jinlin; Zheng, Peng; Meng, Qian; Cai, Aofei; Cheng, Tingting; Gong, Yumei

doi:10.1007/s10853-019-03461-4

Cited by 9 publications

(6 citation statements)

References 41 publications

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“…When compared to non-impregnated S-100-HC (adsorption capacity, 4.02 mg S/g (no toluene), 2.71 mg S/g (toluene)), Ag/S-100-HC was a promising candidate giving an equilibrium adsorption capacity of 6.88 mg S/g without using toluene and 4.22 mg S/g in the presence of toluene. Its enhanced sulfur selectivity could be attributed to its ordered dendritic mesoporous silica/carbon nature with large center-radial mesoporous channels, providing easy access to active metal sites and a synergistic effect between carbonaceous species and embedded silver ions [ 155 ].…”

Section: Mesoporous Silica and Mesoporous Silica Nanoparticles In mentioning

confidence: 99%

“…These studies indicate direct interactions of HOMO orbitals with the LUMO (lowest unoccupied molecular orbital), belonging to the active species present in silica gel, are responsible for selective elimination of sulfur rich molecules in fuel. Wang et al reported on Ni- Schematic representation of the synergistic effect of DBT adsorption on dope carbonaceous mesoporous silica supports, Ag/ dendritic mesoporous silica/carbon nanosphere (DMS/CN) structure [155].…”

Section: Silica Gelsmentioning

confidence: 99%

“…Figure 10.Schematic representation of the synergistic effect of DBT adsorption on dope carbonaceous mesoporous silica supports, Ag/ dendritic mesoporous silica/carbon nanosphere (DMS/CN) structure[155].…”

mentioning

confidence: 99%

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Recent Advances in Functionalized Mesoporous Silica Frameworks for Efficient Desulfurization of Fuels

Mendiratta

Ali

2020

Nanomaterials

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Considerable health and climate benefits arising from the use of low-sulfur fuels has propelled the research on desulfurization of fossil fuels. Ideal fuels are urgently needed and are expected to be ultra-low in sulfur (10–15 ppm), with no greater than 50 ppm sulfur content. Although several sulfur removal techniques are available in refineries and petrochemical units, their high operational costs, complex operational needs, low efficiencies, and higher environmental risks render them unviable and challenging to implement. In recent years, mesoporous silica-based materials have emerged as promising desulfurizing agents, owing to their high porosity, high surface area, and easier functionalization compared to conventional materials. In this review, we report on recent progress in the synthesis and chemistry of new functionalized mesoporous silica materials aiming to lower the sulfur content of fuels. Additionally, we discuss the role of special active sites in these sorbent materials and investigate the formulations capable of encapsulating and trapping the sulfur-based molecules, which are challenging to remove due to their complexity, for example the species present in JP-8 jet fuels.

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Section: Mesoporous Silica and Mesoporous Silica Nanoparticles In mentioning

confidence: 99%

Section: Silica Gelsmentioning

confidence: 99%

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Recent Advances in Functionalized Mesoporous Silica Frameworks for Efficient Desulfurization of Fuels

Mendiratta

Ali

2020

Nanomaterials

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“…Sulfide ions (S 2− ) in wastewater can corrode metal materials, poison the human body, and release malodorous gases, posing serious hazards to the human health and environment (Liang et al, 2020;Liu et al, 2020;Zhang et al, 2018b). Gas extraction method (Zhou et al, 2019), biological method (Qian et al, 2019), and precipitation method (Liu et al, 2019) are traditional methods for removing S 2− from wastewater. However, the gas extraction method consumes extensively large amount of energy sulfuric acid (H 2 SO 4 ) as the electrolyte (Tang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Feooh and Feooh@zno by Hydrothermal Method and the Adsorption of S2- In Wastewater

Meng

et al. 2022

Journal of Environmental Engineering and Landscape Management

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FeOOH and FeOOH@ZnO were prepared by hydrothermal synthesis, and their structures and adsorption properties toward S2− were studied. The results showed that too high hydrothermal temperature was not conducive to the adsorption of S2−. However, using sodium dodecyl sulfate (SDS) for FeOOH preparation and adding nanometer ZnO (FeOOH@ZnO) could significantly improve the adsorption of S2− by FeOOH, and adsorption removal rate was close to 90.0% and adsorption amount was 87.5 mg·g−1. The structural analysis showed that the modification of FeOOH by SDS and the addition of nano-ZnO resulted in the reduction in size of the FeOOH particles, forming amorphous inclusion structure with ZnO present inside and FeOOH outside. The specific surface area of FeOOH@ZnO was found to be higher than that of FeOOH. Therefore, it is beneficial to the adsorption of S2−. XPS fitting results showed that ferrous deposits appeared in the process of adsorption of S2− by FeOOH@ZnO, and it was considered that the oxygen of Fe = O was replaced with sulfur.

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“…Nowadays, the demand of low-sulfur, high-quality transportation fuels is growing rapidly by reason of the necessity to solve pollution problems induced by SO x emissions and to meet the increasingly stringent environmental protection laws and regulations (Rajendran et al 2020). The main industrial processes to realize sulfur removal include hydrodesulfurization (HDS), oxidative desulfurization (Zhang et al 2020;Wu et al 2020;Wei et al 2020;Jiang et al 2020) and adsorptive desulfurization (Dong et al 2020;Liu et al 2019;Wu et al 2018a;Li et al 2018a). During the HDS process, catalysts play an important role in determining the efficiency.…”

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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Monodispersed dendritic mesoporous silica/carbon nanospheres with enhanced active site accessibility for selective adsorptive desulfurization

Cited by 9 publications

References 41 publications

Recent Advances in Functionalized Mesoporous Silica Frameworks for Efficient Desulfurization of Fuels

Recent Advances in Functionalized Mesoporous Silica Frameworks for Efficient Desulfurization of Fuels

Synthesis of Feooh and Feooh@zno by Hydrothermal Method and the Adsorption of S2- In Wastewater

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

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