Results 181 to 190 of about 4,290 (226)

Chabazite supported NiMo catalysts: Activity and sulfur poisoning

Applied Catalysis A: General, 2007
Abstract This paper reports recent findings on nanostructured mixed metal clusters of nickel and molybdenum on the surface of chabazite (CHA) which show novel activity and resistance to sulfur poisoning in hydrogenation catalysis. Three systems, Ni-CHA, Mo-CHA, and NiMo-CHA, were prepared by ion-exchange and characterized by instrumental neutron ...
B.R. Greenhalgh, S.M. Kuznicki, A.E. Nelson   +2 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +1 more source

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).
openaire   +1 more source

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