Development of the HYD route of hydrodesulfurization of dibenzothiophenes over Pd–Pt/γ-Al2O3 catalysts

Monometallic Pd and Pt and Bimetallic Pd-Pt/Al2O3-TiO2for the HDS of DBT: Effect of the Pd and Pt Incorporation Method

“…For the IMP catalysts, the negative peak appears at 67 ∘ C, and for the MOCVD catalysts, the negative peak appears at 75 ∘ C with a shoulder at 67 ∘ C. For the IMP/MOCVD catalyst, the negative peak appears at 99 ∘ C, which suggests that part of the deposited Pd particles in the bimetallic Pd-Pt catalysts is present either as isolated metal particles with low dispersion or alloyed with Pt. For both bimetallic IMP and MOCVD catalysts, the peak corresponding to the Pd-H x formation is in agreement with that reported by Baldovino-Medrano et al [35], where the interaction between Pd and Pt modifies the temperature of the Pd-H x formation to 63 ∘ C. Navarro et al [16] detected a broad peak at 379 ∘ C, which was due to the reduction of the Pd particle along with the coimpregnated Pt particles resulting from an interaction between them. However, in our case, these interactions are present only in the IMP catalysts.…”

“…In both cases, the low metallic content (0.5% wt.) allows for a high dispersion of Pt on the TiO 2 matrix, and the interactions between Pt and TiO 2 may be responsible for the high catalytic activity that was observed, which is in agreement with the report published by Galindo and de los Reyes [20] and Baldovino-Medrano et al [35]. The opposite effect was observed for the monometallic Pd catalysts where better catalytic behavior was obtained over the Pd-IMP catalyst.…”

Nature of active sites in Ni2P hydrotreating catalysts as probed by iron substitution

“…The US Environmental Protection Agency recently issued a final rule requiring refineries to cut sulfur levels in gasoline from 30 ppm to 10 ppm by Jan. 2017 [3]. Current topics of study include investigation of the nitrogen tolerance [4], trimetallic compositions [5], the addition of additives like P and B [6] and Ga [7], the use of egg-shell or hierarchical supports [8], the use of composite supports [9,10], the use of zeolites [11], the use of mesoporous supports [12,13], oxidative desulfurization [14], and noble metals [15]. Metal phosphides have recently received extensive attention as a new type of hydrodesulfurization (HDS) catalyst because of their high activity and stability in the HDS and hydrodenitrogenation (HDN) of model and real feeds [8,[16][17][18][19][20][21][22].…”

Synergetic Behavior of TiO2‐Supported Pd(z)Pt(1−z) Catalysts in the Green Synthesis of Methyl Formate

“…On the one hand, platinum is known to be a very efficient catalyst in oxidation reactions, and, on the other hand, palladium has shown a high selectivity to MF . Several papers report on the synergy between Pd and Pt for diverse reactions such as the hydrogenation of aromatics and oxygenates, and the combustion of hydrocarbons . The bulk molar ratio between the metals is often critical for the catalytic performance.…”

“…ics [14][15][16][17][18][19] and oxygenates, [20][21][22] and the combustion of hydrocarbons. [23] The bulk molar ratio between the metals is often critical for the catalytic performance.…”