Heterobimetallic catalysis for lignocellulose to ethylene glycol on nickel-tungsten catalysts: Influenced by hydroxy groups

Fuel ◽  
2018 ◽  
Vol 230 ◽  
pp. 332-343 ◽  
Author(s):  
Zhuqian Xiao ◽  
Qiang Zhang ◽  
Tianting Chen ◽  
Xinning Wang ◽  
Yu Fan ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Hydroxy Groups ◽  
Tungsten Catalysts ◽  
Nickel Tungsten

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

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 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

Simultaneous Catalytic Reductions of NO and SO2by H2over Nickel-Tungsten Catalysts

2008 ◽  
Vol 112 (9) ◽  
pp. 3376-3382 ◽  
Author(s):  
Xuehui Li ◽  
Peng Zhu ◽  
Furong Wang ◽  
Lefu Wang ◽  
Shik Chi Tsang
Keyword(s):  
Tungsten Catalysts ◽  
Nickel Tungsten

Recent Advances in Chemistry and Applications of Substituted Poly(ethylene glycol)s

2005 ◽  
Vol 70 (3) ◽  
pp. 269-291 ◽  
Author(s):  
Miloš Sedlák
Keyword(s):  
Molecular Weight ◽  
Ethylene Glycol ◽  
Drug Delivery Systems ◽  
Point Of View ◽  
Low Molecular Weight ◽  
Poly Ethylene Glycol ◽  
Phase Coupling ◽  
Chemical Reagents ◽  
Poly Ethylene ◽  
Hydroxy Groups

Poly(ethylene glycol)s are well defined and easily accessible macromolecules with suitable properties for applications in chemistry, biotechnologies and medicine. The terminal hydroxy groups of poly(ethylene glycol)s can easily be converted into reactive functional groups by a number of routine reactions of organic chemistry. The chemical reagents or catalysts anchored to poly(ethylene glycol) chains were used in a number of syntheses including the enantioselective ones. Poly(ethylene glycol)s serve as carriers in combinatorial syntheses in the liquid phase. Coupling of poly(ethylene glycol)s with other polymers was used to prepare series of block copolymers having numerous applications. From the point of view of medical applications it is significant that substituted poly(ethylene glycol)s are non-toxic and resistant to recognition by the immunity system. That is why they are often used as carriers of many low-molecular-weight as well as high-molecular-weight medical drugs (drug delivery systems). In the conjugates with drugs their biological activity increases and their toxicity decreases. A review with 41 references.

Preparation of nano-scale nickel-tungsten catalysts by pH value control and application in hydrogenolysis of cellulose to polyols

2017 ◽  
Vol 45 (6) ◽  
pp. 641-650 ◽  
Author(s):  
Zhu-qian XIAO ◽  
Jian-wei MAO ◽  
Jian-bing JI ◽  
Ru-yi SHA ◽  
Yu FAN ◽  
...  
Keyword(s):  
Ph Value ◽  
Nano Scale ◽  
Tungsten Catalysts ◽  
Nickel Tungsten

Hydrocracking of vacuum gas oil in the presence of supported nickel-tungsten catalysts

2011 ◽  
Vol 52 (3) ◽  
pp. 446-458 ◽  
Author(s):  
A. S. Ivanova ◽  
E. V. Korneeva ◽  
G. A. Bukhtiyarova ◽  
A. L. Nuzhdin ◽  
A. A. Budneva ◽  
...  
Keyword(s):  
Vacuum Gas Oil ◽  
Gas Oil ◽  
Tungsten Catalysts ◽  
Nickel Tungsten

scholarly journals Conversion of sugars to ethylene glycol with nickel tungsten carbide in a fed-batch reactor: high productivity and reaction network elucidation

2014 ◽  
Vol 16 (2) ◽  
pp. 695-707 ◽  
Author(s):  
Roselinde Ooms ◽  
Michiel Dusselier ◽  
Jan A. Geboers ◽  
Beau Op de Beeck ◽  
Rick Verhaeven ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Tungsten Carbide ◽  
Batch Reactor ◽  
Reaction Network ◽  
Fed Batch ◽  
High Productivity ◽  
Nickel Tungsten

The Production of Liquid Fuel Products by the Catalytic Hydroliquefaction of Sapropels Using Nickel and Nickel-Tungsten Catalysts

2021 ◽  
Vol 21 (6) ◽  
pp. 413-423
Author(s):  
E. N. Terekhova ◽  
O. B. Belskaya
Keyword(s):  
Organic Matter ◽  
Liquid Fuel ◽  
Maximum Yield ◽  
Ni Catalysts ◽  
Renewable Sources ◽  
Liquid Products ◽  
Tungsten Catalysts ◽  
Nickel Tungsten ◽  
Supported Metal

Ni catalysts with the carbon-mineral supports obtained from sapropel were synthesized and studied in the catalytic hydroliquefaction of sapropel. It was found that catalysts with the supports obtained from mineral sapropel are more active as compared to those based on organic sapropel; therewith, bimetallic NiW catalysts showed a higher activity than monometallic nickel, irrespective of the support nature. The conversion of the organic matter of sapropel and the composition of liquid products are affected by both the features of supported metal and the composition of support. The liquid products of hydroliquefaction contain mostly the nitrogen- and oxygen-containing compounds. The maximum yield of С5-С21 hydrocarbons is achieved for the catalysts with the supports obtained from mineral sapropel. The composition of the liquid products of sapropel hydroliquefaction is similar to that of biofuels obtained from other renewable sources; such products can be introduced in the known schemes of further processing.

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