Influence of Si/Al molar ratio on the hydrogenation, isomerization and ring opening of naphthalene over silica-alumina supported Ni2P catalyst

Produce Low Aromatic Contents with Enhanced Cold Properties of Hydrotreated Renewable Diesel Using Pt/Alumina-Beta-Zeolite: Reaction Path Studied via Monoaromatic Model Compound

“…However, the addition of alumina binder suppresses Lewis acid site number, and further increases the Brønsted acid site number to have moderated acidic strength on the surface [9]. Thepublications observed on protonation of Brønstedacid sites induce hydrogen ions for rebranching and isomerisation processes in high Si/Al zeolites [10][11][12][13][14][15][16][17][18]. The previous study revealed that zeolite makes the transition metal more electrophilic, thus helps the reoxidation of metal during the reaction [19].…”

“…Hydrotreated FAME in Gas Oil ( In recent decades, hydro-isomerisation of ULSD by noble metals on acidic solid catalyst like zeolites or silica aluminates in micro-or mesopore structure was used in refineries [6][7][8][9]. Zeolite synthesis with different crystalline structure and characteristics had widely studied and, its performance was investigate using hydro-isomerisation and hydrocracking on ZSM, Y-type, H-β, SAPO and MCM for branching the high molecular weight straight-chain hydrocarbons [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Product shape selectivity mainly achieved through the crystalline pore structure and molecule size in pore diffusive diameter, but the acidity of catalyst play the main role in product distribution [13][14][15].The tuning of the acidic property of zeolite and extrudate was achieved by varying SiO 2 /Al 2 O 3 (or Si/Al) and the operating temperature.…”

“…Apart from acidity, large or medium pore size was required to avoid secondary cracking [23]. Similarly, large diameter pore zeolite can increases monobranch isomers with low hydrocracking at higher isomerisation selectivity [9][10][11][12][13][14][15].…”

“…Instead of doping Cl through hydrohalogenation mechanism [10,11], preparing zeolite pellets using chlorine-hydrogel can trap the Cl in intercrystalline structure. Here, impregnation Energies 2019, 12, 2853 4 of 15 methods were used widely to load the known quantity of metals and promoters on the support surface [12][13][14][15][16][17]. Also, zeolite dehydrating at calcination temperature between 350 and 500 • C was optimum; in which agglomeration of the framework can be avoided [5,[11][12][13][14].…”

“…Hence, the segmented side of pellet-material shows a higher dispersion of Pt up to 2.11 wt%, though it represents a single point analysis of Pt; however, multiple locations of spectra testing might vary slightly in metal load. Generally, chemical species reside on oxides of Al 2 O 3 on the surface indicates Brønsted acidic sites and SiO 2 influence widely Lewis acidic sites [13][14][15][16][17][18]. Low Lewis acidic sites indicate the low coke deposition on the catalyst surface [27,28].…”