Highly dispersed metal-clusters and -colloids for the preparation of active liquid-phase hydrogenation-catalysts

1992 ◽  
Vol 272 ◽  
Author(s):  
Helmut Bönnemann ◽  
Werner Brijoux ◽  
Rainer Brinkmann ◽  
Eckard Dinjus ◽  
Rainer Fretzen ◽  
...  
Keyword(s):  
Particle Size ◽  
Liquid Phase ◽  
Metal Clusters ◽  
Hydrogenation Catalysts ◽  
Organometallic Clusters ◽  
Liquid Phase Hydrogenation ◽  
Highly Dispersed ◽  
Active Liquid ◽  
Effect Of Particle Size ◽  
Smsi Effect

SUMMARYA comparison of the activities of conventionally precipitated metals on charcoal, deposited organometallic clusters and metal colloids for liquid-phase hydrogenation has been made under standard conditions in order to assess the effect of particle size. The strong SMSI-effect known for TiO2-supports was simulated on charcoal by doping the surface with small amounts of Ti(0) and subsequent oxygenation.

Highly dispersed metal clusters and colloids for the preparation of active liquid-phase hydrogenation catalysts

1992 ◽  
Vol 74 (1-3) ◽  
pp. 323-333 ◽  
Author(s):  
Helmut Bo¨nnemann ◽  
Werner Brijoux ◽  
Rainer Brinkmann ◽  
Eckard Dinjus ◽  
Rainer Fretzen ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Metal Clusters ◽  
Hydrogenation Catalysts ◽  
Liquid Phase Hydrogenation ◽  
Highly Dispersed ◽  
Active Liquid

Effect of Particle Size on Monometallic and Bimetallic (Au,Pd)/C on the Liquid Phase Oxidation of Glycerol

2006 ◽  
Vol 108 (3-4) ◽  
pp. 147-153 ◽  
Author(s):  
Nikolaos Dimitratos ◽  
Jose Antonio Lopez-Sanchez ◽  
David Lennon ◽  
Francesca Porta ◽  
Laura Prati ◽  
...  
Keyword(s):  
Particle Size ◽  
Liquid Phase ◽  
Liquid Phase Oxidation ◽  
Phase Oxidation ◽  
Effect Of Particle Size

Particle size effect in liquid-phase hydrogenation of phenylacetylene over Pd catalysts: Experimental data and theoretical analysis

2019 ◽  
Vol 358 ◽  
pp. 520-530 ◽  
Author(s):  
Pavel V. Markov ◽  
Igor S. Mashkovsky ◽  
Galina O. Bragina ◽  
Johan Wärnå ◽  
Evgenii Yu. Gerasimov ◽  
...  
Keyword(s):  
Experimental Data ◽  
Particle Size ◽  
Liquid Phase ◽  
Theoretical Analysis ◽  
Size Effect ◽  
Particle Size Effect ◽  
Pd Catalysts ◽  
Liquid Phase Hydrogenation

Nickel–alumina composite aerogels as liquid-phase hydrogenation catalysts

2001 ◽  
Vol 285 (1-3) ◽  
pp. 309-316 ◽  
Author(s):  
Dong Jin Suh ◽  
Tae-Jin Park ◽  
Seo-Ho Lee ◽  
Kyung-Lim Kim
Keyword(s):  
Liquid Phase ◽  
Hydrogenation Catalysts ◽  
Liquid Phase Hydrogenation ◽  
Composite Aerogels ◽  
Alumina Composite

Effect of particle size on the densification and dielectric properties of BaTiO3 ceramics prepared by liquid phase sintering

2011 ◽  
Vol 209 (2) ◽  
pp. 243-247 ◽  
Author(s):  
Yanan Zou ◽  
Yugong Wu ◽  
Xiaozan Guo ◽  
Shuai Tong ◽  
Zhiyuan Wang ◽  
...  
Keyword(s):  
Particle Size ◽  
Dielectric Properties ◽  
Liquid Phase ◽  
Liquid Phase Sintering ◽  
Effect Of Particle Size

Dechromization Kinetics of Limonitic Laterite Ores by Alkali-Roasting Method Using Sodium Hydroxide

2011 ◽  
Vol 233-235 ◽  
pp. 798-804
Author(s):  
Qiang Guo ◽  
Jing Kui Qu ◽  
Bing Bing Han ◽  
Guang Ye Wei ◽  
Tao Qi
Keyword(s):  
Activation Energy ◽  
Particle Size ◽  
High Temperature ◽  
Liquid Phase ◽  
Avrami Model ◽  
Phase Reduction ◽  
Laterite Ores ◽  
Effect Of Particle Size ◽  
Roasting Temperature ◽  
Kinetics Of

A novel process was proposed for the activation pretreatment of Cr-containing limonitic laterite ores by NaOH roasting. The dechromization kinetics of the laterite ores and the effect of particle size, NaOH-ore ratio, and roasting temperature on Cr extraction were studied in detail. Experimental results indicate that decreasing the particle size and increasing the NaOH-ore ratio and roasting temperature increase the Cr extraction rate. Approximately 96% Cr in the laterite ores could be extracted under the optimal alkali-roasting conditions. The results also indicate that the Avrami model is suitable for the dechromization process and that the apparent activation energy is calculated 11.12 kJ·mol-1. The 99.5% Cr2O3 was obtained from Na2CrO4 leached in the alkali solution by liquid-phase reduction and then calcining at high temperature.

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