scholarly journals Correlation of Distribution of Activation Energy of Hydrogen Desorption with Catalytic Activity in Ethane Hydrogenolysis by Silica-Supported Nickel Catalysts.

1997 ◽  
Vol 30 (4) ◽  
pp. 762-765
Author(s):  
Masahiko Arai ◽  
Kyosuke Suzuki ◽  
Yoshiyuki Nishiyama
Keyword(s):  
Activation Energy ◽  
Catalytic Activity ◽  
Nickel Catalysts ◽  
Hydrogen Desorption ◽  
Ethane Hydrogenolysis ◽  
Supported Nickel Catalysts

Chemisorption of Oxygen on Supported Nickel Catalysts

1993 ◽  
Vol 58 (4) ◽  
pp. 839-844 ◽  
Author(s):  
Hana Zahradníková ◽  
Olga Šolcová ◽  
Květa Jirátová
Keyword(s):  
Catalytic Activity ◽  
Oxygen Uptake ◽  
Diethylene Glycol ◽  
Reductive Amination ◽  
Nickel Catalysts ◽  
Oxygen Chemisorption ◽  
Supported Nickel Catalysts

One unsupported nickel catalysts (about 55 wt.% Ni) supported on SiO2, Al2O3, TiO2, Nb2O5, ZrO2, V2O5 and ZnO were characterized by pulse dynamic oxygen chemisorption measured at -78 °C and evaluated in the reaction of reductive amination of diethylene glycol. Correlation was obtained between their oxygen uptake and catalytic activity.

An Overview of Reforming Technologies and the Effect of Parameters on the Catalytic Performance of Mesoporous Silica/Alumina Supported Nickel Catalysts for Syngas Production by Methane Dry Reforming

2020 ◽  
Vol 13 (4) ◽  
pp. 303-322
Author(s):  
M.A. Saad ◽  
N.H. Abdurahman ◽  
Rosli Mohd Yunus ◽  
Mohammed Kamil ◽  
Omar I. Awad
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Nickel Catalysts ◽  
Catalytic Performance ◽  
Dry Reforming ◽  
Future Research ◽  
Methane Dry Reforming ◽  
Syngas Production ◽  
Silica Alumina ◽  
Supported Nickel Catalysts

Synthetic gas - a combination of (H2) and (CO) - is an important chemical intermediate for the production of liquid hydrocarbon, olefin, gasoline, and other valuable chemicals. Several reforming methods that use steam, carbon dioxide, and oxygen in the presence of various catalytic systems have been extensively investigated, and this paper reviews the recent research on the state-of-the-art of reforming technologies and the effect of parameters on the catalytic activity of mesoporous silica/alumina supported nickel catalysts for syngas production by methane dry reforming. First, we provide an overview of reforming technologies, including methane dry reforming, steam methane reforming, partial oxidation of CH4, and auto thermal reforming of CH4. Then, we review the literature on dry reforming catalysts. Next, we describe recent findings on the effect of parameters on the catalytic activity of mesoporous silica/alumina supported nickel catalysts for syngas production. Finally, we make proposals for future research. This study can help achieve a better understanding of the reforming technologies and the effects of parameters on catalytic performance for syngas production, thus contributing to the development of green technologies.

Benzene hydrogenation over alumina-supported nickel nanoparticles prepared by polyol method

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59858-59864 ◽  
Author(s):  
Tahar Mokrane ◽  
Abdel-Ghani Boudjahem ◽  
Mohammed Bettahar
Keyword(s):  
Catalytic Activity ◽  
Nickel Nanoparticles ◽  
Nickel Catalysts ◽  
Polyol Method ◽  
Benzene Hydrogenation ◽  
Supported Nickel Catalysts

The reactivity of alumina-supported nickel catalysts can be improved by storing hydrogen in catalysts. This illustrates that a smooth correlation exists between the amount of stored hydrogen in catalysts and the catalytic activity.

Effect of molybdenum carbide concentration on the Ni/ZrO2 catalysts for steam-CO2 bi-reforming of methane

RSC Advances ◽  
2015 ◽  
Vol 5 (122) ◽  
pp. 100865-100872 ◽  
Author(s):  
Weizuo Li ◽  
Zhongkui Zhao ◽  
Panpan Ren ◽  
Guiru Wang
Keyword(s):  
Catalytic Activity ◽  
Synthesis Gas ◽  
Molybdenum Carbide ◽  
Nickel Catalysts ◽  
Efficient Approach ◽  
Supported Nickel Catalysts

This work presents an efficient approach to enhance the catalytic activity and stability of supported nickel catalysts for steam-CO2 bi-reforming of methane to synthesis gas by introducing the appropriate amount of molybdenum carbide.

Catalysis on evaporated metal films II. The efficiency of different metals for the reaction between methane and deuterium

1953 ◽  
Vol 217 (1130) ◽  
pp. 376-389 ◽  
Keyword(s):  
Activation Energy ◽  
Catalytic Activity ◽  
Exchange Reaction ◽  
Catalytic Reaction ◽  
Frequency Factor ◽  
Nickel Catalysts ◽  
Metal Films ◽  
The Other ◽  
Iron Films ◽  
Adsorption Of Methane

The exchange reaction between methane and deuterium is followed on evaporated films of rhodium, platinum, palladium and tungsten. On all four catalysts there is evidence of two different mechanisms for the exchange as had been found on nickel catalysts (Kemball 1951): one produces CH 3 D and the other gives the compounds CH 2 D 2 , CHD 3 and CD 4 . The energies of activation, frequency factors and orders of reaction with respect to the pressures of the two gases for both mechanisms are determined. The energies of activation on tungsten are much lower than on the other metals, and this fact is attributed to the low activation energy for the adsorption of methane on tungsten which occurs readily at 0° C. A section is devoted to a discussion of the effect of an inhibiting gas on the frequency factor of a catalytic reaction. It is shown that a relationship between the logarithm of the frequency factor and the energy of activation on different catalysts may be caused by a relationship between the entropy and heat of adsorption of the inhibiting gas on the catalysts. Iron films are found to have no catalytic activity for this reaction at temperatures up to 420° C.

Activation Energy for Benzene Hydrogenation over Supported Nickel Catalysts

Nature ◽  
1966 ◽  
Vol 212 (5066) ◽  
pp. 1039-1040 ◽  
Author(s):  
JOHN B. BUTT ◽  
JAMES P. IRVING
Keyword(s):  
Activation Energy ◽  
Nickel Catalysts ◽  
Benzene Hydrogenation ◽  
Supported Nickel Catalysts

Pre-reforming of Liquefied Petroleum Gas over Magnesium Aluminum Mixed Oxide Supported Nickel Catalysts

2013 ◽  
Vol 33 (7) ◽  
pp. 1176-1182
Author(s):  
Xinxing WANG ◽  
Xueguang WANG ◽  
Xingfu SHANG ◽  
Wangxin NIE ◽  
Xiujing ZOU ◽  
...  
Keyword(s):  
Mixed Oxide ◽  
Nickel Catalysts ◽  
Liquefied Petroleum Gas ◽  
Supported Nickel Catalysts

Catalyst Selection for Hydrogenation of 1,2-Dihydroacenaphthylene

1998 ◽  
Vol 63 (11) ◽  
pp. 1945-1953 ◽  
Author(s):  
Jiří Hanika ◽  
Karel Sporka ◽  
Petr Macoun ◽  
Vladimír Kysilka
Keyword(s):  
Activation Energy ◽  
Nickel Catalyst ◽  
Palladium Catalyst ◽  
Active Component ◽  
Reaction Order ◽  
Nickel Catalysts ◽  
Practical Application ◽  
Repeated Use ◽  
Selection For ◽  
Catalyst Selection

The activity of ruthenium, palladium, and nickel catalysts for the hydrogenation of 1,2-dihydroacenaphthylene in cyclohexane solution was studied at temperatures up to 180 °C and pressures up to 8 MPa. The GC-MS technique was used to identify most of the perhydroacenaphthylene stereoisomers, whose fractions in the product were found dependent on the nature of the active component of the catalyst. The hydrogenation was fastest on the palladium catalyst (3% Pd/C). The nickel catalyst Ni-NiO/Al2O3, which is sufficiently active also after repeated use, can be recommended for practical application. The activation energy of 1,2-dihydroacenaphthylene hydrogenation using this catalyst is 17 kJ/mol, the reaction order with respect to hydrogen is unity.

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