Influence of support acidity of NiMoS catalysts in the activity for hydrogenation and hydrocracking of tetralin

Sulfide Catalysts Supported on Porous Aromatic Frameworks for Naphthalene Hydroprocessing

“…Figure 3c-f. The distances between the fringes were calculated to be 0.63 nm in the case of molybdenum catalysts, and 0.65 nm in the case of tungsten catalysts, which is consistent with the interplanar spacing for bulk MoS 2 and WS 2 reported in the literature [4,12,23].…”

“…al. for NiMoS catalysts supported by alumina [4]. Furthermore, modifying benzene rings with even low-acidic OH-groups increases the yields of cracking products [23].…”

“…In general, two methods for obtaining sulfide catalysts are used: impregnation of different supports by metal salts with post-sulfidizing [2][3][4][5], and usage of metal sulfides as catalyst precursors with conversion to a catalytically-active form during the reaction [6][7][8][9]. The mechanisms, by which metal sulfides decompose to their active form were investigated in several studies [10,11].…”

“…We believe that porous aromatic frameworks will be appropriate materials for obtaining NiMeS nanoparticles with a Type II structure due to their advantages mentioned above. The precursors for synthesis of bimetallic Ni-W and Ni-Mo sulfides were prepared through impregnation of [(n-Bu) 4 N] 2 [Ni(MeS 4 ) 2 ] (Me = W, Mo) with PAFs in THF and subsequent evaporation of the solvent. The formation of active phase occurred in situ during the reaction of hydrotreatment of naphthalene, used as the model molecule of condensed aromatics.…”

The Reactants’ Phase State: A Nonnegligible Factor in Tetralin Hydrogenation Catalysts Evaluation

“…This difference probably affects the 2 International Journal of Chemical Engineering hydrogenation activity of catalyst and leads to the decrease of aromatics conversion. Generally, model compounds are composed of aromatics and inert hydrocarbons; for example, naphthalene dissolves in -hexadecane [16][17][18][19], -tridecane [20,21], -decane [22], -heptane [5,[10][11][12][13][14]23], and benzene [4] or tetralin dissolves in -dodecane [24], -decane [22,25,26], -heptane [6-9, 12, 15, 27, 28], -hexane [29], and cyclohexane [30,31]. The model compounds using light components as solvents are easier to vaporize and have lower dew point.…”