Results 181 to 190 of about 4,569 (225)

Kinetics of the hydrodenitrogenation of o-toluidine over fluorinated NiMoS/Al2O3 and NiMoS/ASA catalysts

Journal of Catalysis, 2003
The kinetics of the hydrodenitrogenation of o-toluidine has been studied between 330 and 370 ◦ C at 5.0 MPa in a continuous microflow reactor over sulfided and fluorinated NiMo catalysts supported on alumina as well as silica–alumina. The silica–alumina-supported catalysts exhibited a higher hydrodenitrogenation activity than their alumina-supported ...
Lianglong Qu, Martin Flechsenhar, Roel Prins   +2 more
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Nickel divided catalysts in the NiMo system : correlation between parent alloy-catalyst

Journal de Chimie Physique, 1991
La structure de catalyseurs de Raney dopes au Mo prepares a partir d'alliages de composition Ni 2 Al 3 a ete etudiee par microscopie electronique a transmission et analysee a fine echelle. La structure des catalyseurs est reliee a la microstructure de l'alliage precurseur et peut etre correlee aux proprietes physicochimiques et a l'activite ...
S Hamar-Thibault, J Masson
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The role of nanobeta zeolite in NiMo hydrotreating catalysts

Applied Catalysis A: General, 2012
Abstract Hydrotreating catalyst NiMo/Al 2 O 3 was modified by adding nano-sized zeolite beta and by hydrothermal treatments. The catalysts were characterized by BET, XRD, Pyridine-IR, 29 Si NMR, 27 Al NMR and TEM. The results showed that the addition of nanobeta could significantly enhance the hydrodesulfurization (HDS), hydrogenation, and ...
Songdong Yao, Ying Zheng, Siauw Ng, Lianhui Ding, Hong Yang   +4 more
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Hydrodesulfurization of dibenzothiophene compounds using fluorinated NiMo/Al2O3 catalysts

Applied Catalysis B: Environmental, 2003
Abstract A series of fluorinated NiMo/Al2O3 catalysts containing different amounts of fluorine were prepared and their activity with respect to the hydrodesulfurization (HDS) of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) was compared with that of fluorinated CoMo/Al2O3 catalysts. Fluorine modifies two properties of NiMo/Al2O3
Heeyeon Kim, Jung Joon Lee, Sang Heup Moon   +2 more
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Monodispersed ultrasmall NiMo metal oxide nanoclusters as hydrodesulfurization catalyst

Applied Catalysis B: Environmental, 2016
Abstract In this study, we report the synthesis of ultrasmall NiMo bimetallic metal oxide nanoclusters (∼2 nm), supported on γ-Al 2 O 3 for hydrodesulfurization reaction. The metal oxide nanoclusters were prepared by colloidal synthesis using oleic acid and oleylamine as ligands, followed by incorporation of nanoclusters into the pores of γ-Al 2 O 3
Rupesh Singh, Deepak Kunzru, Sri Sivakumar   +2 more
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Hydrodenitrogenation of indole over NiMo sulfide catalysts

1996
Abstract Indole HDN has been investigated over sulfided Ni-Mo catalysts in a vapor phase flow reactor. Experiments were performed in a wide range of temperatures and feed concentrations to study the role of o-ethylaniline (OEA), and the effect of the Ni promoter and sulfur compounds in the reaction network.
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Surface properties and hydrocracking activity of NiMo zeolite catalysts

Applied Catalysis A: General, 1998
The hydrocracking properties of Ni, Mo and NiMo sulphides supported on an ultrastable HY zeolite were examined by studying the hydroconversion of n-decane at moderate pressure (3 MPa). All catalysts were found to deactivate during the first hours on-stream, then reaching almost constant conversion values.
B Egia, J.F Cambra, P.L Arias, M.B Güemez, J.A Legarreta, B Pawelec, J.L.G Fierro   +6 more
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Hydrogenation of Coker Naphtha with Nimo Catalyst

1992
Abstract Bitumen-derived coker naphtha was hydrotreated over three commercial NiMo catalysts in downflow pilot reactors. The tests were conducted by varying temperatures (140-280°C), reactor pressures P (3, 4 and 5 MPa), LHSV (1 and 2 hr−1) and at a constant H2/oil ratio (600 S m3/m3).
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Niobium sulfide as a dopant for hydrotreating NiMo catalysts

Catalysis Today, 2000
Niobium sulfide has been recently found to be an interesting new active phase for hydrodesulfurization. In this work, niobium was used as a dopant for a conventional hydrotreating catalyst. A NiMo hydrotreating catalyst in the oxide form was doped with various contents of Nb precursor salt ...
Gaborit, V., Allali, N., Geantet, C., Breysse, M., Vrinat, M., Danot, M.   +5 more
openaire   +2 more sources

Hydrodeoxygenation of γ-valerolactone on bimetallic NiMo phosphide catalysts

Journal of Catalysis, 2017
Abstract A series of supported Ni-Mo-P alloy catalysts was studied for the catalytic hydrodeoxygenation (HDO) of the cyclic five-membered ester γ-valerolactone (GVL-C5H8O2) as a model compound for pyrolysis oil. Alloy formation in Ni-Mo-P was indicated by X-ray diffraction analysis and X-ray absorption near-edge spectroscopy, which showed systematic ...
Gwang-Nam Yun, So-Jin Ahn, Atsushi Takagaki, Ryuji Kikuchi, S. Ted Oyama   +4 more
openaire   +1 more source