Determination of metal crystallite size and morphology in supported nickel catalysts

1981 ◽  
Vol 67 (1) ◽  
pp. 186-206 ◽  
Author(s):  
D MUSTARD
Keyword(s):  
Crystallite Size ◽  
Nickel Catalysts ◽  
Supported Nickel Catalysts ◽  
Size And Morphology

scholarly journals Benzene Hydrogenation Activities of Supported Nickel Catalysts in Relation to Their Chemisorption Properties

1995 ◽  
Vol 12 (2) ◽  
pp. 151-159 ◽  
Author(s):  
Th. El-Nabarawy ◽  
A.A. Attia ◽  
M.A. Hamada ◽  
A.M. Youssef
Keyword(s):  
Crystallite Size ◽  
Surface Area ◽  
Metal Surface ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Nickel Catalysts ◽  
Nickel Nitrate ◽  
Benzene Hydrogenation ◽  
Supported Nickel Catalysts

Samples of nickel on alumina (1.1–10.4 wt.% Ni) were prepared by impregnating alumina in hydrated nickel nitrate. The textural properties of the calcined catalysts have been determined from nitrogen adsorption at 77 K. Calcined catalysts were reduced prior to determination of the chemisorbed benzene at 308 K or chemisorbed hydrogen at 383 K. Hydrogenation of benzene was also determined at 473 K using the flow technique. The surface area of NiO/Al2O3 catalysts decrease and their mean pore radii increase with an increase in NiO content. These changes are more pronounced for catalysts containing more than 5% metal. Chemisorption of benzene proceeds via the formation of π-bonds with nickel. The chemisorption of hydrogen indicated that the percentage dispersion decreases and the crystallite size increases with an increase in metal loading. Dispersion, crystallite size and metal surface are important factors in determining the activity of supported nickel catalysts for benzene hydrogenation.

Effect of Calcination Temperature on Nickel/Alumina Catalysts

1992 ◽  
Vol 57 (10) ◽  
pp. 2073-2077 ◽  
Author(s):  
Khaliq Ahmed ◽  
Pronab Mistry
Keyword(s):  
Crystallite Size ◽  
Calcination Temperature ◽  
Hydrogen Adsorption ◽  
Nitrogen Adsorption ◽  
Nickel Catalysts ◽  
Surface Areas ◽  
Different Temperatures ◽  
Supported Nickel Catalysts ◽  
Alumina Catalysts

Alumina-supported nickel catalysts prepared by the methods of impregnation and coprecipitation and heated at four different temperatures showed that the optimal calcination temperature for both types of catalysts lies in the region of 623-673 K. Crystallite size measurements by XRD revealed that coprecipitated samples have larger crystallites than the impregnated samples. The total surface areas measured by nitrogen adsorption and the results of metal area measurements made by hydrogen adsorption are in agreement with the crystallite size results.

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.

Highly Efficient LaxCe1–xO2–x/2 Nanorod-Supported Nickel Catalysts for CO Methanation: Effect of La Addition

2021 ◽  
Vol 35 (4) ◽  
pp. 3307-3314
Author(s):  
Yahong Han ◽  
Jinxian Zhao ◽  
Yanhong Quan ◽  
Shunan Yin ◽  
Shiping Wu ◽  
...  
Keyword(s):  
Nickel Catalysts ◽  
Co Methanation ◽  
Highly Efficient ◽  
Supported Nickel Catalysts ◽  
La Addition
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