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.

Reductive Amination of Diethylene Glycol to Morpholine over Supported Nickel Catalysts: Zeolites as Catalyst Admixtures

1992 ◽  
Vol 57 (4) ◽  
pp. 901-908 ◽  
Author(s):  
Květa Jirátová ◽  
Hana Šnajdaufová ◽  
Lenka Morávková ◽  
Ludmila Kubelková
Keyword(s):  
Chemical Composition ◽  
Surface Properties ◽  
Amorphous Silica ◽  
Diethylene Glycol ◽  
Reductive Amination ◽  
Catalytic Properties ◽  
Nickel Catalysts ◽  
Phase Changes ◽  
Zeolite Surface ◽  
Supported Nickel Catalysts

The effect of HZSM-5, H-silicalite and amorphous silica admixtures on the surface properties of nickel catalysts as well as on their activities, selectivities and stabilities in the reductive amination of diethylene glycol was studied. It was found that, in comparison with amorphous silica, zeolites do not positively affect the catalytic properties of nickel catalysts. In addition, the acidity of the zeolites, the dispersity of the nickel phase, changes in the chemical composition during the reaction and adsorption of the reaction components or intermediates on the surface and consequent blocking of the zeolite surface played a role.

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.

Examination of High-Loaded Nickel Catalysts by IR Spectroscopy: Effect of the Support and Pd on Surface Properties

1992 ◽  
Vol 57 (12) ◽  
pp. 2575-2582 ◽  
Author(s):  
Květa Jirátová ◽  
Lenka Morávková ◽  
Hana Šnajdaufová ◽  
Evgenii A. Paukshtis
Keyword(s):  
Ir Spectroscopy ◽  
Surface Properties ◽  
Diethylene Glycol ◽  
Reductive Amination ◽  
Nickel Catalysts ◽  
Ammonia Molecule ◽  
Catalyst Stability ◽  
Catalyst Acidity ◽  
Effect Of The Support

Activation of the ammonia molecule and subsequent adsorption of the NH2 fragment on the surface of the NiO + Pd/TiO2 catalysts, in contrast to NiO + Pd/SiO2 catalysts, was demonstrated by IR spectroscopy. The decrease in the NiO + Pd/TiO2 catalyst acidity was manifested in the higher catalyst stability in reductive amination of diethylene glycol to morpholine.

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

Direct synthesis of hexitols from microcrystalline cellulose and birch over zirconium(iv) phosphate supported nickel catalysts and the mechanism study

2021 ◽  
Vol 23 (3) ◽  
pp. 1353-1360
Author(s):  
Xiaodong Liu ◽  
Xiaohao Liu ◽  
Ning Li ◽  
Peiyong Ma ◽  
Ying Zhang
Keyword(s):  
Microcrystalline Cellulose ◽  
Direct Synthesis ◽  
Nickel Catalysts ◽  
Structure Activity Relationship ◽  
Activity Relationship ◽  
Mechanism Study ◽  
Structure Activity ◽  
Supported Nickel Catalysts

A series of Ni/ZrPx catalysts with precisely regulated acid and hydrogenation sites were prepared to study the structure–activity relationship for sorbitol production directly from microcrystalline cellulose and raw biomass.

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