Gas oil hydrocracking on NiW/USY catalyst: Effect of tungsten and nickel loading

Production of Middle Distillate Through Hydrocracking of Paraffin Wax Over NiMo/SiO2-Al2O3 Catalysts: Effect of Solvent in the Preparation of SiO2-Al2O3 by a Sol–Gel Method

“…Alkanes are dehydrogenated on the metallic sites and then isomerized or cracked on the acid sites through classical and non-classical carbenium ion chemistry [12][13][14]. The most conventional hydrocracking catalysts used for the production of gasoline or diesel from crude oil are NiMo and NiW catalysts supported on silicaalumina [15], zirconia [16], and USY zeolite [17]. Pd or Pt-loaded solid acid catalysts have also been investigated for hydrocracking of heavy hydrocarbons [18,19].…”

Storage of Nitrous Oxide (NOx) in Diesel Engine Exhaust Gas using Alumina-Based Catalysts: Preparation, Characterization, and Testing

“…Scanning electron microscope (SEM) studies were performed using a Cambridge stereo scan 360 (Wetzlar, Germany) and polaron for the sputter coating. Before scanning, the powder samples were spread onto the double-side carbon tape and coated with gold (20-30 nm thickness) in order to increase the conductivity and therefore the quality of the results (Alsobaai et al 2007c). An elemental analyzer (EA) was also used to analyze the composition of fresh and aged catalyst samples.…”

NiMo/USY-Alumina Catalysts with Different Zeolite Content for Vacuum Gas Oil Hydrocracking Over Stacked Beds

“…Hydrocracking catalysts are bifunctional systems with hydrogenating and acid sites. Supported Ni-Mo(W)-S component performs hydrogenation and hydrodesulfurisation reactions, while acidic support, usually based on amorphous silica-alumina (ASA) or zeolites, performs cracking and isomerization reactions [1]. For the second stage of hydrocracking, when the feed with low-sulfur and nitrogen content (as a rule, less than 10 ppm) is used, Pt and Pd bifunctional catalysts may be effective [5].…”