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.

scholarly journals Hydrocracking of Tetralin on Supported Nickel–Tungsten Catalysts

1977 ◽  
Vol 50 (1) ◽  
pp. 79-82 ◽  
Author(s):  
Shoko Yamadaya ◽  
Masaaki Oba ◽  
Yasuo Miki
Keyword(s):  
Tungsten Catalysts ◽  
Nickel Tungsten

Molybdenum area and hydrogenation and hydrogenolytic activities of hydrorefining catalysts

1983 ◽  
Vol 48 (6) ◽  
pp. 1703-1709 ◽  
Author(s):  
Rafael López ◽  
Miloš Kraus
Keyword(s):  
Hydrogenation Activity ◽  
Oxygen Chemisorption ◽  
Molybdenum Catalysts ◽  
Reduced Forms ◽  
Nickel Tungsten

A series of nickel or cobalt promoted molybdenum catalysts and one nickel-tungsten catalyst have been studied by oxygen chemisorption on reduced oxidic samples, by activities of oxidic and sulphided samples for 1-hexene hydrogenation and by activities of sulphided samples for benzothiophen and pyridine hydrogenolyses. A good correlation was obtained between oxygen chemisorption and hydrogenation activity on oxidic, partially reduced, forms of the catalysts, and a limited correlation for activities of sulphided forms. Parallel activities for hydrogenation and hydrogenolyses were observed.

scholarly journals Hydrogenolysis of cellulose to valuable chemicals over activated carbon supported mono- and bimetallic nickel/tungsten catalysts

2014 ◽  
Vol 16 (7) ◽  
pp. 3580-3588 ◽  
Author(s):  
Katarína Fabičovicová ◽  
Oliver Malter ◽  
Martin Lucas ◽  
Peter Claus
Keyword(s):  
Activated Carbon ◽  
Tungsten Catalysts ◽  
Nickel Tungsten

scholarly journals Catalytic Activity of Thermolyzed [Co(NH3)6][Fe(CN)6] in CO Hydrogenation Reaction

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3782
Author(s):  
Alevtina N. Gosteva ◽  
Mayya V. Kulikova ◽  
Yulya P. Semushina ◽  
Mariya V. Chudakova ◽  
Nikita S. Tsvetov ◽  
...  
Keyword(s):  
Thermal Destruction ◽  
Co Hydrogenation ◽  
Hydrogenation Reaction ◽  
Tropsch Synthesis ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Catalyst Composition ◽  
Synthetic Liquid Hydrocarbons

Currently, the processes of obtaining synthetic liquid hydrocarbons and oxygenates are very relevant. Fischer-Tropsch synthesis (FTS) is the most important step in these processes. The products of thermal destruction in argon of the mixture [Co(NH3)6][Fe(CN)6] and Al(OH)3 were used as catalysts for CO hydrogenation. The resulting compositions were studied using powder X-ray diffraction, IR spectroscopy, elemental analysis, SEM micrographs. The specific surface area, pore and particle size distributions were determined. It was determined that the DCS-based catalysts were active in the high-temperature Fischer-Tropsch synthesis. The effect of aluminum in the catalyst composition on the distribution of reaction products was revealed.

scholarly journals Structural Changes of Sulfided Nickel-Tungsten Catalysts during Oxidative Regeneration.

1994 ◽  
Vol 37 (6) ◽  
pp. 594-602 ◽  
Author(s):  
Nobuyuki MATSUBAYASHI ◽  
Masaaki TAMAYAMA ◽  
Hiromichi SHIMADA ◽  
Toshio SATO ◽  
Yuji YOSHIMURA ◽  
...  
Keyword(s):  
Structural Changes ◽  
Oxidative Regeneration ◽  
Tungsten Catalysts ◽  
Sulfided Nickel ◽  
Nickel Tungsten
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