Support effect for CoMoS and CoNiMoS hydrodesulfurization catalysts prepared by controlled method

Ninh, Thi Kim Thoa; Laurenti, D.; Leclerc, E.; Vrinat, M.

doi:10.1016/j.apcata.2014.07.042

Cited by 63 publications

(20 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Changes in the initial activity and synergy during the HDS of 4,6-DMDBT were reported for MoS, CoMoS, NiMoS and CoNiMoS catalysts supported on Al 2 O 3 , SiO 2 , TiO 2 and ZrO 2 [18]. No preferential promotion by Ni or Co of any of the edges in MoS 2 crystallites (Mo-or S-edge) was found.…”

Section: Introductionmentioning

confidence: 77%

Influence of the support on the catalytic performance of Mo, CoMo, and NiMo catalysts supported on Al2O3 and TiO2 during the HDS of thiophene, dibenzothiophene, or 4,6-dimethyldibenzothiophene

et al. 2016

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 77%

Influence of the support on the catalytic performance of Mo, CoMo, and NiMo catalysts supported on Al2O3 and TiO2 during the HDS of thiophene, dibenzothiophene, or 4,6-dimethyldibenzothiophene

et al. 2016

View full text Add to dashboard Cite

“…The XPS for the Mo3d5/2 decomposition showed peaks attributed to Mo in sulfide (Mo 4+ ), oxysulfide (Mo 5+ ), and oxidic (Mo 6+ ) species. These peaks were located at 228.79 eV, 230.4 eV, and 232.80 eV, respectively [38,69,70].…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 99%

Effect of Metal Loading in Unpromoted and Promoted CoMo/Al2O3–TiO2 Catalysts for the Hydrodeoxygenation of Phenol

et al. 2019

View full text Add to dashboard Cite

This paper reports the effects of changes in the supported active phase concentration over titania containing mixed oxides catalysts for hydrodeoxygenation (HDO). Mo and CoMo supported on sol–gel Al2O3–TiO2 (Al/Ti = 2) were synthetized and tested for the HDO of phenol in a batch reactor at 5.5 MPa, 593 K, and 100 ppm S. Characterization results showed that the increase in Mo loading led to an increase in the amount of oxide Mo species with octahedral coordination (MoOh), which produced more active sites and augmented the catalytic activity. The study of the change of Co concentration allowed prototypes of the oxide species and their relationship with the CoMo/AT2 activity to be described. Catalysts were tested at four different Co/(Co + Mo) ratios. The results presented a correlation between the available fraction of CoOh and the catalytic performance. At low CoOh fractions (Co/(Co + Mo) = 0.1), Co could not promote all MoS2 slabs and metallic sites from this latter phase performed the reaction. Also, at high Co/(Co + Mo) ratios (0.3 and 0.4), there was a loss of Co species. The Co/(Co + Mo) = 0.2 ratio presented an optimum amount of available CoOh and catalytic activity since the XPS results indicated a higher concentration of the CoMoS phase than at a higher ratio.

show abstract

“…As mentioned earlier, the research directed to modulate the metal-support interaction can be envisaged from many viewpoints, such as the use of crystallographic phases different from the typical gamma alumina [38] or supporting the active phases over unconventional single metal (Ms) oxides such as those based on Ti [26,[39][40][41][42][43][44][45], Zr [26,[41][42][43][44]46,47], Si [23,26,[48][49][50] or Ga [51]. Nevertheless, more recently to gain advantage from the individual single metal oxide properties and to overcome their intrinsic limitations, several binary mixed oxide materials such as Al2O3-Ga2O3 [50], Al2O3-TiO2 [4,52-57], ZrO2-TiO2 [35,58,59], Al2O3-ZrO2 [60][61][62], MgO-TiO2 [63], Al2O3-MgO [56,64], Mn-Al2O3 [65][66][67], and Al2O3-zeolite [68] have been studied, among several others that have been tested to prepare HDS catalysts.…”

Section: Mixed Oxides Support: a Different Approachmentioning

confidence: 99%

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

et al. 2019

View full text Add to dashboard Cite

The literature from the past few years dealing with hydrodesulfurization catalysts to deeply remove the sulfur-containing compounds in fuels is reviewed in this communication. We focus on the typical transition metal sulfides (TMS) Ni/Co-promoted Mo, W-based bi- and tri-metallic catalysts for selective removal of sulfur from typical refractory compounds. This review is separated into three very specific topics of the catalysts to produce ultra-low sulfur diesel. The first issue is the supported catalysts; the second, the self-supported or unsupported catalysts and finally, a brief discussion about the theoretical studies. We also inspect some details about the effect of support, the use of organic and inorganic additives and aspects related to the preparation of unsupported catalysts. We discuss some hot topics and details of the unsupported catalyst preparation that could influence the sulfur removal capacity of specific systems. Parameters such as surface acidity, dispersion, morphological changes of the active phases, and the promotion effect are the common factors discussed in the vast majority of present-day research. We conclude from this review that hydrodesulfurization performance of TMS catalysts supported or unsupported may be improved by using new methodologies, both experimental and theoretical, to fulfill the societal needs of ultra-low sulfur fuels, which more stringent future regulations will require.

show abstract

Support effect for CoMoS and CoNiMoS hydrodesulfurization catalysts prepared by controlled method

Cited by 63 publications

References 20 publications

Influence of the support on the catalytic performance of Mo, CoMo, and NiMo catalysts supported on Al2O3 and TiO2 during the HDS of thiophene, dibenzothiophene, or 4,6-dimethyldibenzothiophene

Influence of the support on the catalytic performance of Mo, CoMo, and NiMo catalysts supported on Al2O3 and TiO2 during the HDS of thiophene, dibenzothiophene, or 4,6-dimethyldibenzothiophene

Effect of Metal Loading in Unpromoted and Promoted CoMo/Al2O3–TiO2 Catalysts for the Hydrodeoxygenation of Phenol

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Contact Info

Product

Resources

About