The functionalities of Pt/γ-Al2O3 catalysts in simultaneous HDS and HDA reactions

Synthesis of Pt/Al2O3 catalyst using mesoporous alumina prepared with a cationic surfactant

“…These wormlike particles have also been observed in aluminas prepared by the sol-gel method using the cationic surfactant hexadecyl trimethyl ammonium bromide [19]. These structures probably came from the uncontrolled coalescence of the aluminum species forming the pore walls, during calcination [43].…”

Kinetic assessment of the simultaneous hydrodesulfurization of dibenzothiophene and the hydrogenation of diverse polyaromatic structures

“…The absence of heat and mass transport limitations was verified as stated elsewhere. 37,46 The reaction feedstock accounted for the following compounds employed either individually or in blends: dibenzothiophene (Sigma-Aldrich, 98%), as a model sulfur compound in ultra-deep HDS, naphthalene (Laboratorios León, 98%), fluorene (Merck, 95%), and phenanthrene (Sigma-Aldrich, 98%), as model aromatic compounds. Hexadecane (Sigma-Aldrich, ≥ 99%) was used as an internal standard for chromatography and cyclohexane (commercial grade) was used as solvent.…”

“…It is interesting to remark that the mechanism postulated herein resembles previous considerations for the reactivity of dibenzothiophene over noble metal based catalysts. 37,46,81…”

“…[33][34][35] Several authors have studied the hydrodesulfurization of dibenzothiophene in the presence of aromatic compounds. 34,36,37 Aromatic compounds with two and three fused rings have been found to inhibit HDS catalysts. 36,38,39 The inhibiting effect on the aforementioned reaction routes is far from being understood, nonetheless.…”

Preparation of γ-Al2O3 porous nanosolid/fluorescein fluorescent nanocomposites by a simple method

“…In particular, ␥-Al 2 O 3 has received wide attention, with established use as a sorbent, catalyst and catalyst support [1][2][3][4][5][6][7][8], etc. On the other hand, a large amount of dangling bonds and vacancies on the surface of nanoparticles makes it possible for the preparation of nanocomposite materials with excellent properties by surface reaction [9].…”