Results 191 to 200 of about 4,569 (225)

Activation and Regeneration of a NiMo/Al2O3 Hydrotreatment Catalyst

Industrial & Engineering Chemistry Research, 1994
Activation and regeneration procedures applied to a nickel-molybdenum on alumina catalyst, both fresh and spent, were tested by the hydrodesulfurization of thiophene. Characterization techniques used included temperature programmed reduction and oxidation (TPR, TPO), diffuse reflectance spectroscopy (DRS), and X-ray diffraction (XRD).
V. L. S. Teixeira da Silva, R. Frety, Martin Schmal   +2 more
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Arsenic effects on a NiMo/Al2O3 hydrotreating catalyst

2011
Hydrotreating is the response to the necessity of a cleaner feed for downstream processes and reduced pollution. Hydrotreating catalysts are vital in this process; hence catalyst deactivation is a key issue. The principal objective of this research was the experimental study of hydrotreating catalyst deactivation due to arsenic compounds.
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Promoting effect of ruthenium on NiMo/Al2O3 hydrotreating catalysts

Applied Catalysis A: General, 2001
Abstract Ruthenium (Ru) has been tested as a dopant for NiMo on alumina catalyst. A promotion effect is observed for the hydrodesulfurization (HDS) of dibenzothiophene (DBT), and the hydrogenation (HYD) of tetralin. Maximum activity is obtained at a loading in the range of 0.25–0.5 wt.% Ru added to a NiMo catalyst.
M Cattenot, C Geantet, C Glasson, M Breysse   +3 more
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NiMo/C Used as Magnetic Support for SILP Catalysts

Journal of Inorganic and Organometallic Polymers and Materials, 2018
In this work, supported ionic liquid (IL) phases catalysts were prepared based on Pd dispersed in IL phases supported on magnetic particles of nickel/molybdenum covered with carbon (NiMo/C). The magnetic support was prepared via CVD method at 800 °C. XRD analysis showed the phases of metallic nickel and molybdenum carbide.
Evelisy C. O. Nassor, Raquel V. Mambrini, Eduardo N. dos Santos, Flávia C. C. Moura, Maria Helena Araujo   +4 more
openaire   +1 more source

Hydrodeoxygenation of Vegetable Oil on NiMoS/WO3–Al2O3 Catalysts

Russian Journal of Applied Chemistry, 2017
Tungstate-containing aluminum oxide is suitable as a catalyst support for hydrodeoxygenation of sunflower oil, ensuring 81–83 wt % yield of liquid products at 380°С, 4.0 MPa, and feed space velocity of 1 h–1. The catalyst acidity increases with increasing tungsten oxide content, leading to an increase in the content of decarboxylation/decarbonylation ...
A. A. Nepomnyashchiy, E. A. Buluchevskiy, A. V. Lavrenov, V. L. Yurpalov, T. I. Gulyaeva, N. N. Leont’eva, V. P. Talzi   +6 more
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Study of NiMo/ZrO2 catalysts for hydrodesulfurization

2005
Several hydrodesulfurization catalysts, NiMo/ZrO2 (550), NiMo/ZrO2 (650) and NiMo/ZrO2 (550)-1, were prepd. by co-impregnation, with or without calcinations, followed by sulfidation, to study influences of support types and prepn. conditions on their catalytic activities.
Jia, M., Afanasiev, P., Vrinat, M., Li, W., Xu, H., Ge, Q.   +5 more
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Synthesis, Characterization and Catalytic Activity of Supported NiMo Catalysts

Topics in Catalysis, 2011
A study of NiMo catalysts supported on MCM41 modified with alumina prepared by the sol–gel method is presented. Ni–Mo phases were impregnated on the supports using the solution method with the purpose to obtain a material whose hexagonal structure of the MCM41 would not be affected with the addition of these active phases.
K. Martínez-Juárez, R. Silva-Rodrigo, A. Castillo-Mares, A. Guevara-Lara, J. A. Melo-Banda, A. Vázquez-Rodríguez, E. Terres-Rojas   +6 more
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Hydrocracking activity of NiMo-USY zeolite hydrotreating catalysts

1997
Publisher Summary Hydrotreating reactions are usually carried out with bimetallic catalysts containing Mo or W and Ni or Co, depending on the function to be promoted. As hydrogenation seems to be an important step in heteroatom removal from polyaromatic compounds the use of Ni as promoter is a growing tendency.
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Characterisation of NiMo HDS catalysts containing MCM-41

2005
NiMo catalysts supported on Al 2 O 3 -MCM-41, Al 2 O 3 TiO 2 -MCM-41, MCM-41 and Al 2 O 3 TiO 2 were investigated for their properties and HDS activity. The catalysts were characterised by N 2 adsorption, TPD-NH 3 , TPR, X-ray diffraction and SEM. Catalytic activity was tested in the HDS of the diesel oil fraction (1.01 wt.%S).
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MgO-supported Mo, CoMo and NiMo sulfide hydrotreating catalysts

Catalysis Today, 2003
Abstract The most common preparation of high surface area MgO (100–500 m2 g−1) is calcination of Mg(OH)2 obtained either by precipitation or MgO hydration or sol–gel method. Preparation of MoO3/MgO catalyst is complicated by the high reactivity of MgO to H2O and MoO3.
openaire   +1 more source