Investigation of 4,6-dimethyldibenzothiophene hydrodesulfurization over a highly active bulk MoS2 catalyst

Novel, efficient hollow zeolitically microcapsulized noble metal catalysts

“…Thus, the poison resistance of noble metal catalysts-especially the resistance toward the polyaromatic heterocyclic molecules, which are considered the most refractory S (or N) species [38,39]-is a very attractive property. The poison-resistibility of Pt@S1, CPt@S1, Pt/SiO 2 , and Pt/Al 2 O 3 were compared by adding benzothiazole into the reaction systems after the reaction proceeded for 1 h (Fig.…”

Influence of the preparation method on the hydrotreating activity of MoS2/Al2O3 extrudates: A Raman microspectroscopy study on the genesis of the active phase

“…Due to increasingly strict regulations, research has been dedicated to the preparation of more active catalytic systems for this process. Despite the development of alternatives, such as noble-metal catalysts [2], unsupported bulk MoS 2 catalysts [3,4] and supported metal-phosphide systems [5,6], supported (Co/Ni)MoS 2 catalysts are still predominantly used in most refineries, and their preparation remains an important industrial process. Throughout the years, numerous studies have been carried out to determine the influence of different preparation parameters on the structure and activity of these important catalysts [7][8][9][10][11][12][13].…”

The effect of additives on hydrodesulfurization of dibenzothiophene over bulk molybdenum sulfide: Increased catalytic activity in the presence of phenol

“…There are a number of studies that aimed at examination of the effect of such species on the catalytic activity in HDS; those additive types studied were aromatics [4][5][6][7], hydroaromatics [8], nitrogen containing basic aromatic reagents [4,[9][10][11][12][13][14], and H 2 S gas [15][16][17][18][19]. The presence of all was determined to be detrimental for HDS processes when performed over supported catalysts.…”

“…The presence of all was determined to be detrimental for HDS processes when performed over supported catalysts. Nevertheless only was the latter reagent, H 2 S, tested for bulk Molybdenum sulfide catalyst and found, in contrast to those with supported ones, to be beneficial for the activity of the catalyst [18,19].…”