Potassium effect in K-Ni(Co)PW/Al2O3 catalysts for selective hydrotreating of model FCC gasoline

Ishutenko, D. I.; Minaev, P. P.; Anashkin, Yu.; Nikulshin, P.A.; Можаев, А. В.; Maslakov, K. I.

doi:10.1016/j.apcatb.2016.10.043

Cited by 34 publications

(11 citation statements)

References 66 publications

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“…As shown in Table S1, all the HRTEM images of the supported MoS 2 catalysts showed low stacked layers of MoS 2 , which was consistent with the XRD results. Especially for MoS 2 /AC, an almost single-layered dispersion of MoS 2 was observed, which has been proved that it exhibits superior HDO activity and selectivity to multilayered MoS 2 in producing phenol. , The edge-to-corner ratio of the MoS 2 slab was calculated according to the literature and was regarded as evidence of the relative amount of MoS 2 edge active site . It seems that more edge active site was exposed for MoS 2 /AC and MoS 2 /SiO 2 catalysts.…”

Section: Resultsmentioning

confidence: 94%

“…33,37 The edge-to-corner ratio of the MoS 2 slab was calculated according to the literature and was regarded as evidence of the relative amount of MoS 2 edge active site. 53 It seems that more edge active site was exposed for MoS 2 /AC and MoS 2 /SiO 2 catalysts. The dispersity of MoS 2 shows significant differences according to the STEM mapping images of the samples.…”

Section: Methodsmentioning

confidence: 95%

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Toward Alkylphenols Production: Lignin Depolymerization Coupling with Methoxy Removal over Supported MoS₂ Catalyst

Diao

et al. 2020

Ind. Eng. Chem. Res.

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Alkylphenols are indispensable chemicals that are currently derived from fossil resources. Conversion of lignin into alkylphenols in a selective manner is highly desirable, while it represents one of the biggest challenges in biorefinery. Herein, lignin depolymerization coupling with methoxy removal over supported MoS 2 catalyst for the direct production of alkylphenols has been studied. The catalysts were prepared by incipient wetness impregnation and characterized by N 2 physisorption, XRD, NH 3 -TPD, CO chemisorption, ICP, TEM, and XPS. The catalytic performance and the reaction mechanism were initially assessed by the hydrodeoxygenation (HDO) of eugenol. Among the catalysts with MoS 2 supported on different supports (HZSM-5, SAPO-34, SiO 2 , Al 2 O 3 , and activated carbon (AC)), the acid-rich MoS 2 /AC with high specific surface areas and more exposed MoS 2 edge sites owed a complete conversion of eugenol and 64.8% yield of 4-propylphenol under 3 MPa H 2 at 300 °C for 3 h. In the conversion of lignin-oil, MoS 2 /AC catalyst also exhibited excellent activity in the removal of all the methoxy groups in various aromatic monomers, achieving alkylphenols with selectivity up to 76.2%. Notably, this catalytic system also showed potential in simultaneous hydrocracking coupling with methoxy removal of realistic lignin to afford alkylphenols, thus providing a direct strategy for the selective valorization of lignin.

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Section: Resultsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 95%

Toward Alkylphenols Production: Lignin Depolymerization Coupling with Methoxy Removal over Supported MoS₂ Catalyst

Diao

et al. 2020

Ind. Eng. Chem. Res.

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“…Interestingly, in the W 4f spectrum of WNW-Li 2 S 8 , the binding energies of the two peaks corresponding to W 6+ are 0.4 eV less than those in Figure 2 c, and are accompanied by the emergence of peaks at 34.4 and 36.5 eV ( Figure 2 f). These peaks are attributed to W 5+ as a result of the formation of WS x O y oxysulfide species [ 32 , 33 , 34 ]; that is, the oxidation of high-order lithium polysulfide to thiosulfate is accompanied by the reduction of W 6+ to W 5+ . The peaks of the O 1s spectrum of WNW-Li 2 S 8 appear at lower binding energies than those of the O 1s spectrum of WNW, while the area of the center peak at 531.1 eV is greater than that of the corresponding peak in Figure 2 d owing to the formation of thiosulfate.…”

Section: Resultsmentioning

confidence: 99%

WO3 Nanowire/Carbon Nanotube Interlayer as a Chemical Adsorption Mediator for High-Performance Lithium-Sulfur Batteries

et al. 2021

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We developed a new nanowire for enhancing the performance of lithium-sulfur batteries. In this study, we synthesized WO3 nanowires (WNWs) via a simple hydrothermal method. WNWs and one-dimensional materials are easily mixed with carbon nanotubes (CNTs) to form interlayers. The WNW interacts with lithium polysulfides through a thiosulfate mediator, retaining the lithium polysulfide near the cathode to increase the reaction kinetics. The lithium-sulfur cell achieves a very high initial discharge capacity of 1558 and 656 mAh g−1 at 0.1 and 3 C, respectively. Moreover, a cell with a high sulfur mass loading of 4.2 mg cm−2 still delivers a high capacity of 1136 mAh g−1 at a current density of 0.2 C and it showed a capacity of 939 mAh g−1 even after 100 cycles. The WNW/CNT interlayer maintains structural stability even after electrochemical testing. This excellent performance and structural stability are due to the chemical adsorption and catalytic effects of the thiosulfate mediator on WNW.

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“…higher stacking degree(around 4 layers). However, MoS2 slabs with less stacking numbers would hamper the planar adsorption of the macromolecular sulfur compounds through its aromatic rings 51 while MoS2 slabs with higher stacking degree will lead to a crucial reduction in the exposure and accessibility of active sites which are in critical demands for sulfur removal through the perpendicular adsorption of DBT via the S atoms. Based on the previous research results 52 NiMo/ZD catalysts, DBT is mainly converted into BP through DDS route.…”

Section: Discussionmentioning

confidence: 99%

Modified Dendritic Mesoporous Silica Nanospheres Composites: Superior Pore Structure and Acidity for Enhanced Hydrodesulfurization Performance of Dibenzothiophene

et al. 2020

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Dendritic mesoporous silica nanospheres (DMSNs) with center-radical pore structure were successfully fabricated with ZSM-5 seeds to synthesize hierarchically meso-microporous ZSM-5/DMSN (ZD) materials, which were used as the support for preparing HDS catalysts. The catalytic activities were evaluated by adopting DBT as the model oil. ZD composites and the corresponding catalysts were well characterized by XRD, XPS, HRTEM and other techniques. The characterization results manifested that the specific center-radical pore structure was retained after the incorporation of microporous zeolite ZSM-5, thus ZD exhibited a wide pore diameter about 17 nm, which was definitely preferable for mass transfer in S removal process. Meantime, the open pore channels enhanced the accessibility of active sites on the internal surface of catalysts. The introducing of ZSM-5 seeds into the framework of DMSNs also improved the acidity and modulated the metal-support interaction as well. As a result, NiMo/ZD series catalysts demonstrated high HDS activities, of which NiMo/ZD-3 achieved the highest HDS efficiency of 98.3%. The superior catalytic performance not only originated from the large center-radical pore structure and good acidity of support, but also related to the suitable metalsupport interaction and perfect dispersion of metallic active sites.

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Potassium effect in K-Ni(Co)PW/Al2O3 catalysts for selective hydrotreating of model FCC gasoline

Cited by 34 publications

References 66 publications

Toward Alkylphenols Production: Lignin Depolymerization Coupling with Methoxy Removal over Supported MoS₂ Catalyst

Toward Alkylphenols Production: Lignin Depolymerization Coupling with Methoxy Removal over Supported MoS₂ Catalyst

WO3 Nanowire/Carbon Nanotube Interlayer as a Chemical Adsorption Mediator for High-Performance Lithium-Sulfur Batteries

Modified Dendritic Mesoporous Silica Nanospheres Composites: Superior Pore Structure and Acidity for Enhanced Hydrodesulfurization Performance of Dibenzothiophene

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Potassium effect in K-Ni(Co)PW/Al2O3 catalysts for selective hydrotreating of model FCC gasoline

Cited by 34 publications

References 66 publications

Toward Alkylphenols Production: Lignin Depolymerization Coupling with Methoxy Removal over Supported MoS2 Catalyst

Toward Alkylphenols Production: Lignin Depolymerization Coupling with Methoxy Removal over Supported MoS2 Catalyst

WO3 Nanowire/Carbon Nanotube Interlayer as a Chemical Adsorption Mediator for High-Performance Lithium-Sulfur Batteries

Modified Dendritic Mesoporous Silica Nanospheres Composites: Superior Pore Structure and Acidity for Enhanced Hydrodesulfurization Performance of Dibenzothiophene

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Product

Resources

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Toward Alkylphenols Production: Lignin Depolymerization Coupling with Methoxy Removal over Supported MoS₂ Catalyst

Toward Alkylphenols Production: Lignin Depolymerization Coupling with Methoxy Removal over Supported MoS₂ Catalyst