Unexpected Support Effect in Hydrotreating: Evidence of a Metallic Character for ReS2/Al2O3 and ReS2/SiO2 Catalysts

Sepúlveda, Catherine; Garcı́a, R.; Escalona, N.; Laurenti, D.; Massin, L.; Vrinat, M.

doi:10.1007/s10562-011-0578-2

Cited by 18 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3a) and 162.7 ± 0.1 eV (Fig. 2Sa) that are respectively characteristic for Re 4f 4/7 and S 2p 3/2 electrons in the ReS 2 are clearly observed [20,21]. However, the rhenium spectrum (Fig.…”

Section: Morphology and Compositionmentioning

confidence: 85%

Synthesis of highly destacked ReS2 layers embedded in amorphous carbon from a metal-organic precursor

Aliaga

Alonso-Núñez

Zepeda

et al. 2016

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

“…3a) and 162.7 ± 0.1 eV (Fig. 2Sa) that are respectively characteristic for Re 4f 4/7 and S 2p 3/2 electrons in the ReS 2 are clearly observed [20,21]. However, the rhenium spectrum (Fig.…”

Section: Morphology and Compositionmentioning

confidence: 85%

Synthesis of highly destacked ReS2 layers embedded in amorphous carbon from a metal-organic precursor

Aliaga

Alonso-Núñez

Zepeda

et al. 2016

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

“…Rhenium-based catalysts have been widely studied as hydrotreating catalysts [9,10,[30][31][32][33][34][35][36][37]. Rhenium sulfide catalysts have higher activities and selectivities to hydrodeoxygenated compounds in comparison to other conventional catalysts.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu addition as a promoter on Re/SiO2 catalysts in the hydrodeoxygenation of 2-methoxyphenol as a model bio oil compound

Martínez

Garcı́a

Fierro

et al. 2016

Fuel

Self Cite

View full text Add to dashboard Cite

The promoting effect of Cu on Re/SiO 2 catalysts was studied for guaiacol hydrodeoxygenation. Cu(x)Re/SiO 2 catalysts containing from 0 to 1.91 wt% Cu and 13 wt % of Re were prepared by successive wet impregnation and characterized using Xray diffraction (XRD), nitrogen sorption, CO chemisorption, X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS) and surface acidity techniques. Batch reactions were carried out at 300°C and 5 MPa of H 2 . The Cu(x)Re/SiO 2 catalysts displayed higher activities than the Re/SiO 2 catalyst with a maximum activity at 1.58 wt% Cu. At loadings above 1.5 wt%, aggregate formation and a loss of metallic Re active sites lead to a decreased activity. The increase of the activity was attributed not only to Cu increasing the Re reducibility, but also to Cu somehow increasing the metallic Re active sites favoring guaiacol conversion. All catalysts displayed the same product distribution, confirming that the Cu in the Cu(x)Re/SiO 2 not change the nature of the active site in the metallic Re nanoparticles. biofuels from bio-oil [4,5], specifically hydrodeoxygenation (HDO), because 99% of compounds in bio oil contain oxygen. These compounds include acids, alcohols, aldehydes, esters, ketones, sugars, phenols, guaiacols, furan, phenolic lignin derivatives and terpenes [4]. Guaiacol (2-methoxyphenol) has been widely used as a model compound for HDO [6][7][8][9][10][11] because this molecule has two different organic functions (Ar-OH and Ar-OCH 3 groups), and it is considered representative of the organic phase of bio-oil.Different active phases, such as sulfides [9,12,13], nitrides [14-17] and metallic catalysts [18][19][20] have been studied for HDO. Metallic catalysts favor hydrogenation

show abstract

“…Although Al 2 O 3 is the most commonly used support, the HDS performances of the catalysts are known to strongly depend on the nature of the support. [1][2][3][4][5] Meso-structured oxides offer further perspectives for catalytic applications: they exhibit various advantages such as a particularly high specific surface area (SSA) with a pore size in the meso-pore range, which can be easily tailored (typically between 2 and 15 nm). Some meso-structured SiO 2 -based materials have been studied extensively as HDS catalyst supports, such as SBA, [6][7][8][9][10][11] MCM-41, [12,13] HMS [14,15] and KIT-6.…”

Section: Introductionmentioning

confidence: 99%

Tuning Hydrodesulfurization Active‐Phase Dispersion using Optimized Mesoporous Titania‐Doped Silica Supports

et al. 2013

View full text Add to dashboard Cite

International audienceSolids composed of TiO2 nano-crystallites (10-40wt%) dispersed in an SBA-15 matrix were synthesised and used as hydrodesulfurisation (HDS) active-phase supports. Well-dispersed polymolybdate species were detected by Raman spectroscopy on all the CoMo-based oxidic precursors. Undesirable bulk CoMoO4 mixed oxide was also detected on the surface of low-TiO2-content materials, which suggests the enhancement of the Mo oxidic species dispersion as a result of the presence of TiO2. After activation under H-2/H2S, the obtained catalysts were tested in the HDS of thiophene. An optimum conversion was observed for the catalyst supported on the solid that contained 20wt% TiO2, which outperformed the homologous samples supported on TiO2 and SBA-15. This clearly highlights the beneficial effect of using such nano-TiO2-SBA-15 composite supports, in which SBA-15 confers adequate textural properties to the system, and the active phase benefits from the dispersive effect of TiO2

show abstract

Unexpected Support Effect in Hydrotreating: Evidence of a Metallic Character for ReS2/Al2O3 and ReS2/SiO2 Catalysts

Cited by 18 publications

References 20 publications

Synthesis of highly destacked ReS2 layers embedded in amorphous carbon from a metal-organic precursor

Synthesis of highly destacked ReS2 layers embedded in amorphous carbon from a metal-organic precursor

Effect of Cu addition as a promoter on Re/SiO2 catalysts in the hydrodeoxygenation of 2-methoxyphenol as a model bio oil compound

Tuning Hydrodesulfurization Active‐Phase Dispersion using Optimized Mesoporous Titania‐Doped Silica Supports

Contact Info

Product

Resources

About