CoNiMo/Al2O3 sulfide catalysts for dibenzothiophene hydrodesulfurization: Effect of the addition of small amounts of nickel

Perspectives on strategies for improving ultra-deep desulfurization of liquid fuels through hydrotreatment: Catalyst improvement and feedstock pre-treatment

“…Conventional bimetallic catalysts are susceptible to thermal, chemical, or mechanical degradation and metal coke poisoning, which often leads to inefficient ways to treat feedstock (Cervantes Higher catalytic activity for the trimetallic catalysts was also obtained for the desulfurization of heavy gasoline (Badoga, 2015). Monodispersed γ-Al 2 O 3 supported NiMoW nanocatalysts also showed higher activity compared to NiMo and NiW bimetallic nanocatalysts when tested by Singh et al (Tanimu and Alhooshani, 2019) With such contradictory results, it is important to note that the rational interpretation of the positive or negative role devoted to the addition of a second promoter has not been proposed yet (Cervantes et al, 2020). Therefore, more research can be focused on this work to improve the performance of the catalyst (Singh et al, 2021).…”

“…Severino et al(Severino et al, 2000) and Sadeghbeigi(Sadeghbeigi, 2020) concluded that CoNiMo catalysts are less active as compared to bimetallic catalytic systems when they tested the HDS of thiophene and of 4,6-DMDBT, respectively. Mozhaev et al(Mozhaev et al, 2016) and Cervantes et al(Cervantes et al, 2020) obtained higher HDS activity for DBT when using CoNiMo catalysts compared to bimetallic catalysts.…”

“…et al, 2020). This has motivated the development of trimetallic catalysts such as NiMoW, CoNiW, CoNiMo to increase the versatility of catalysts such as working in various harmful conditions and increased activity due to the additional active phase(Cervantes et al, 2020). These trimetallic catalysts have the advantage of having mixed phases [Ni(Co)MoWS] and their systems can be easily tailored compared to bimetallic and monometallic catalysts(Tanimu and Alhooshani, 2019).…”

Hierarchical Hybrid Supports and Synthesis Strategies for Hydrodesulfurization of Recalcitrance Organosulfur Compounds

“…Mostly, the choice of active metals is based on the level of hydrotreating operation with Ni(Co)Mo(W) being used as a conventional and most popular active metals over six decades in a carrier‐free or supported matrix due to low cost and availability [89–94] . Moreover, the conventional active has may be employed as sulfided monometallic composed of Mo or W, bimetallic (NiMo, CoMo, NiW, CoW), trimetallic (NiCoMo, NiMoW, CoMoW, NiCoW) and ternary or multicomponent active metals [95–101] . In addition, various landmarks of noble and other transition metals have been reported.…”

Oxidative desulfurization of fuel oil catalyzed by a carbon nitride supported phosphotungstic acid based dicationic ionic liquid

“…3 In order to remove them, a higher amount of metal catalyst at higher temperature and hydrogenation pressure must be provided, which not only reduces the octane number of oil, but also greatly increases the cost of deep desulfurization of fuel oil. 4,5 Compared with HDS, non-hydrodesulfurization processes have been widely used because of their high capacity to remove aromatic sulfide and its derivatives and low consumption. [6][7][8][9] Among the typical representative desulfurization methods, oxidative desulfurization (ODS) was widely used in research because of its mild reaction temperature and high removal efficiency for thiophene compounds.…”