Performances of Titania-Supported Ru-Based Bimetallic Catalysts in Glycerol Hydrogenolysis Reaction

2013 ◽  
Vol 791-793 ◽  
pp. 12-15 ◽  
Author(s):  
Jian Feng ◽  
Bin Xu ◽  
De Rong Liu ◽  
Wei Xiong ◽  
Jin Bo Wang
Keyword(s):  
Reaction Mechanism ◽  
Transition Metal ◽  
Bimetallic Catalysts ◽  
Reaction Process ◽  
Ru Catalysts ◽  
Glycerol Hydrogenolysis ◽  
Catalytic Performances

Preliminary studies on the hydrogenolysis of glycerol over the titania-supported Ru-based bimetallic catalysts (Ru-Fe/TiO2, Ru-Co/TiO2, Ru-Ni/TiO2and Ru-Cu/TiO2) were reported. The introduction of a second transition metal can obviously increase the selectivity to 1,2-propanediol of the Ru catalysts, but a deactivation effect was also found. The catalytic performances of the Ru-based bimetallic catalysts were discussed with a proposed reaction mechanism. The addition of Fe, Co, Ni or Cu enables the Ru-based catalysts to favor the dehydration route over the retro-aldolization route in the reaction process.

Glycerol Hydrogenolysis over Ru-Cu Bimetallic Catalysts Supported on Modified Zirconias

2021 ◽  
pp. 118359
Author(s):  
Ana Luiza P. Salgado ◽  
Felipe C. Araújo ◽  
André V.H. Soares ◽  
Yutao Xing ◽  
Fabio B. Passos
Keyword(s):  
Bimetallic Catalysts ◽  
Glycerol Hydrogenolysis

Relativistic DFT Study on the Reaction Mechanism of Second-Row Transition Metal Ru with CO2

2006 ◽  
Vol 110 (10) ◽  
pp. 3552-3558 ◽  
Author(s):  
Xian-Yang Chen ◽  
Yi-Xin Zhao ◽  
Shu-Guang Wang
Keyword(s):  
Reaction Mechanism ◽  
Transition Metal ◽  
Dft Study ◽  
Relativistic Dft

Understanding the reaction mechanism and performances of 3d transition metal cathodes for all-solid-state fluoride ion batteries

2021 ◽  
Vol 9 (1) ◽  
pp. 406-412
Author(s):  
Datong Zhang ◽  
Kentaro Yamamoto ◽  
Aika Ochi ◽  
Yanchang Wang ◽  
Takahiro Yoshinari ◽  
...  
Keyword(s):  
Energy Storage ◽  
Reaction Mechanism ◽  
Solid State ◽  
Transition Metal ◽  
Cathode Materials ◽  
High Energy ◽  
Fluoride Ion ◽  
Energy Storage Devices ◽  
Storage Devices

Fluoride ion batteries (FIBs) are regarded as promising energy storage devices, and it is important and urgent to develop cathode materials with high energy densities for use in FIBs.

Oxidation of 4-Lithium-diazasilacyclopentene with Transition Metal Halides / Oxidation of 4-Lithium-diazasilacyclopentene with Transition Metal Halides

1983 ◽  
Vol 38 (8) ◽  
pp. 953-954 ◽  
Author(s):  
Michael Hesse ◽  
Uwe Klingebiel
Keyword(s):  
Reaction Mechanism ◽  
Transition Metal ◽  
Metal Halides ◽  
Tert Butyl ◽  
Oxidation Potentials

4-Lithium-3,3,5-trimethyl-2-tert-butyl-1,2-diaza-3-sila-5-cyclopentene is oxidized in the reaction with transition metal halides and subsequently dimerizes. Oxidation potentials are given and a reaction mechanism is proposed.

Well-defined nickel(II) tetrazole-saccharinate complex as homogeneous catalyst on the reduction of aldehydes: scope and reaction mechanism

2020 ◽  
Vol 92 (1) ◽  
pp. 151-166 ◽  
Author(s):  
Luís M. T. Frija ◽  
Bruno G. M. Rocha ◽  
Maxim L. Kuznetsov ◽  
Lília I. L. Cabral ◽  
M. Lurdes S. Cristiano ◽  
...  
Keyword(s):  
Experimental Data ◽  
Reaction Mechanism ◽  
Transition Metal ◽  
Dft Calculations ◽  
Microwave Power ◽  
Low Temperatures ◽  
Nickel Complex ◽  
Transition Metal Catalysts ◽  
Homogeneous Catalyst ◽  
First Time

AbstractA new (tetrazole-saccharin)nickel complex is shown to be a valuable catalyst for the hydrosilative reduction of aldehydes under microwave radiation at low temperatures. With typical 1 mol% content of the catalyst (microwave power range of 5–15 W) most reactions are complete within 30 min. The Ni(II)-catalyzed reduction of aldehydes, with a useful scope, was established for the first time by using this catalyst, and is competitive with the most effective transition-metal catalysts known for such transformation. The catalyst reveals tolerance to different functional groups, is air and moisture stable, and is readily prepared in straightforward synthetic steps. Supported by experimental data and DFT calculations, a plausible reaction mechanism involving the new catalytic system is outlined.

Detection of the Intermediates in Preparation of Ammonium Polyphosphate by Temperature Raising Rate Factor

2013 ◽  
Vol 275-277 ◽  
pp. 1654-1657
Author(s):  
Yue Long Liu ◽  
Gou Sheng Liu
Keyword(s):  
Reaction Mechanism ◽  
Industrial Production ◽  
Flame Retardants ◽  
Ammonium Polyphosphate ◽  
Reaction Process ◽  
Halogen Free ◽  
Internal Relationships ◽  
Controllable Preparation

Detection of intermediates is the general way to investigate a reaction mechanism, because the intermediates connect the reactants and the products, the intermediates can reflect some internal relationships between the reactants and the products. By studying the the structures of intermediates, the reaction process and reaction mechanism can thus be understood. Ammonium polyphosphate (APP) is an effective material as halogen-free flame retardants, it has six crystalline forms.In preparation of APP, the factor of temperature raising rate is investigated, some intermediates are detected, the XRD spectra of these intermediates are discussed. The results are informative for controllable preparation of APP in industrial production.

The Influence of Preparation Procedures on Hydrogenation CO2 to Formic Acid over Supported Ru Catalysts

2014 ◽  
Vol 881-883 ◽  
pp. 283-286 ◽  
Author(s):  
Na Liu ◽  
Jie Lei ◽  
Meng Yao Li ◽  
Peng Wang
Keyword(s):  
Catalytic Activity ◽  
Formic Acid ◽  
Ruthenium Oxide ◽  
Nitrogen Adsorption ◽  
Preparation Procedure ◽  
Ru Catalysts ◽  
Optimal Activity ◽  
Adsorption Measurement ◽  
Hydrogenation Of Co ◽  
Catalytic Performances

A series of catalysts made of ruthenium loaded on γ-Al2O3 nanorods were prepared to study the effects of preparation procedure on their catalytic performances for hydrogenation CO2 to formic acid. The catalysts are characterized by XRD, nitrogen adsorption measurement and H2-TPR in detail. The results reveal that the catalytic activity is determined by the structure of supported ruthenium oxide species. The dispersion of RuOx is influenced by the preparation procedures. Optimal activity of catalyst for the hydrogenation of CO2 to formic acid is achieved over a γ-Al2O3 nanorods supported 2.0 wt% ruthenium catalyst, which is prepared by calcinations at 573 K in flowing air for 6h.

Heterogeneous alkaline earth metal–transition metal bimetallic catalysts for synthesis of biodiesel from low grade unrefined feedstock

RSC Advances ◽  
2015 ◽  
Vol 5 (102) ◽  
pp. 83748-83756 ◽  
Author(s):  
Tsz-Lung Kwong ◽  
Ka-Fu Yung
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Metal Oxide ◽  
Bimetallic Catalysts ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Low Grade ◽  
Bimetallic Complex ◽  
Temperature Decomposition

A bimetallic alkaline earth metal–transition metal oxide, synthesized through a method of direct low-temperature decomposition of the bimetallic complex, is reported for the synthesis of biodiesel.

Sign in / Sign up

Export Citation Format

Share Document