Mesoporous materials from zeolite seeds as supports for nickel tungsten sulfide active phases

Recent Advances and Future Aspects in the Selective Isomerization of High n‐Alkanes

“…As mentioned previously, using different zeolite seeds as building blocks the ordered mesophases of acidic MCM-41 could be assembled (172)(173)(174)(175)(176)(177)(178). It has been shown that the nickel-tungsten sulfides catalysts supported on silica-alumina mesostructures assembled from zeolite BEA seeds are more active and more selective toward isomerization of n-decane than the amorphous silica-alumina counterpart (178). These catalysts, which associate strong Brønsted acid sites and no microporosity, could help to discriminate between the 2 parameters that could govern the selectivity of zeolites that is their microporosity and strength of their acid sites.…”

Influence of Cs Substitution on the Structural Properties and Catalytic Performance of Ni-H₃PW₁₂O₄₀/SiO₂ Catalysts

“…3 Hydrocracking catalysts are bifunctional, i.e., the acid sites which provide the cracking function and metal sites with a hydrogenation-dehydrogenation function. [4][5][6][7] The typical acidic supports are amorphous oxides, mixtures of oxides, zeolites, and silicoaluminaphosphates. The metals most commonly used are Pt, Pd or bimetallic systems (i.e., NiW, NiMo, and CoMo).…”

Hydrodesulfurization of dibenzothiophene and 4,6-dimethyldibenzothiophene over NiMo supported on yolk-shell silica catalysts with adjustable shell thickness and yolk size

“…Nevertheless, the drawback of Al2O3 support is that it has no Brønsted (B) acid sites, which is not conducive to ultra-deep desulfurization of diesel. (2) Micro-mesoporous composites; such as, Beta-MCM-41, Beta-SBA-15, ZSM5-SBA-15, Beta-SBA-16 and ZSM-5-SBA-16, etc [16][17][18][19]. By combining the advantages of mesoporous materials and zeolites, these materials could break the restrictions of individual zeolites and mesoporous materials used in the HDS reaction.…”