Effect of fluorine on hydrodesulfurization and hydrogenation activity of doubly promoted (zinc + cobalt) molybdena-alumina catalysts

1991 ◽  
Vol 30 (11) ◽  
pp. 2365-2371 ◽  
Author(s):  
Jose F. Cambra ◽  
Pedro L. Arias ◽  
M. Belen Guemez ◽  
Juan A. Legarreta ◽  
Jose L. G. Fierro
Keyword(s):  
Hydrogenation Activity ◽  
Alumina Catalysts

The effect of composition of cobalt-molybdenum catalysts on their surface acidity and isomerisation activity

1980 ◽  
Vol 45 (3) ◽  
pp. 697-702 ◽  
Author(s):  
Vlastimil Vyskočil ◽  
Miroslav Zdražil
Keyword(s):  
Chromatographic Method ◽  
Surface Acidity ◽  
Parallel Reaction ◽  
Molybdenum Catalysts ◽  
The Difference ◽  
Kinetics Of ◽  
Alumina Catalysts

Kinetics of isomerisation of cyclohexene to methylcyclopentene proceeding as parallel reaction to hydrogenation of cyclohexene to cyclohexane on cobalt-molybdenum catalysts of different composition has been measured. The surface acidity of these catalysts was estimated from the difference in the adsorption of toluene and heptane which was measured by chromatographic method. In a series of catalysts containing molybdenum the acidity parallels isomerisation activity. Cobalt on alumina catalysts and alumina itself have greater acidity but exhibit lower isomerisation activity compared to the catalysts containing molybdenum.

Hydrogenolytic cleavage of pyridine on different cobalt-molybdenum and nickel-tungsten catalysts

1981 ◽  
Vol 46 (6) ◽  
pp. 1348-1354 ◽  
Author(s):  
Mirko Černý ◽  
Miloš Kraus
Keyword(s):  
Reaction Products ◽  
Hydrogenation Activity ◽  
Catalyst Composition ◽  
Tungsten Catalysts ◽  
Nickel Tungsten ◽  
And Tungsten

Composition of the reaction products formed by hydrogenation of pyridine at 300 °C and 15 MPa in the presence of 15 sulphided and unsulphided molybdenum and tungsten catalysts promoted by cobalt and by nickel, respectively, using alumina as the support in most cases, has been examined. It has been proved that the catalyst composition affects both its hydrogenation activity and the ratio of transalkylation to cracking (or hydrocracking) reactions. Relations between the catalyst composition and its activity and selectivity found for the reaction of pyridine differ from those reported for hydrogenolytic cleavage of thiophene, hydrogenation and isomerization of cyclohexene.

Synthesis and Asymmetric Alkene Hydrogenation Activity of C2-Symmetric Enantioenriched Pyridine Dicarbene Iron Dialkyl Complexes

2021 ◽  
Author(s):  
Peter Viereck ◽  
Stephan M. Rummelt ◽  
Natalia A. Soja ◽  
Tyler P. Pabst ◽  
Paul J. Chirik
Keyword(s):  
Hydrogenation Activity ◽  
Alkene Hydrogenation

ChemInform Abstract: RAMAN SPECTROSCOPIC STUDY OF COBALT-MOLYBDENUM Γ-ALUMINA CATALYSTS

1978 ◽  
Vol 9 (40) ◽  
Author(s):  
J. MEDEMA ◽  
C. VAN STAM ◽  
V. H. J. DE BEER ◽  
A. J. A. KONINGS ◽  
D. C. KONINGSBERGER
Keyword(s):  
Spectroscopic Study ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Alumina Catalysts
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