Catalytic Reaction Mechanisms of Ammonia Synthesis

2013 ◽  
pp. 67-183
2020 ◽  
Author(s):  
Diego Garay-Ruiz ◽  
Carles Bo

<div><div><div><p>The computational study of catalytic processes allows discovering really intricate and detailed reaction mechanisms that involve many species and transformations. This increasing level of detail can even result detrimental when drawing conclusions from the computed mechanism, as many co-existing reaction pathways can be in close com- petence. Here we present a reaction network-based implementation of the energy span model in the form of a computational code, gTOFfee, capable of dealing with any user-specified reaction network. This approach, compared to microkinetic simulations, enables a much easier and straightforward analysis of the performance of any catalytic reaction network. In this communication, we will go through the foundations and appli- cability of the underlying model, and will tackle the application to two relevant catalytic systems: homogeneous Co-mediated propene hydroformylation and heterogeneous CO2 hydrogenation over Cu(111).</p></div></div></div>


Author(s):  
E. G. Derouane ◽  
S. B. Derouane-Abd Hamid ◽  
I. I. Ivanova ◽  
H. He ◽  
J. C. Vedrine

2011 ◽  
Vol 694 ◽  
pp. 936-945
Author(s):  
Wu Bin ◽  
Duo Li Chai

In this study, we developed an efficient catalysis-oxidation method for the degradation of phenol in wastewater, in which the Fe3O4 nanocrystals and H2O2 were employed as catalyst and oxidation agents respectively. Firstly, Fe3O4 nanocrystal coated with PEG was prepared via an oxygenation-deposition hydrothermal method, TEM, FT-IR, BET and XRD characterization indicated that the prepared Fe3O4 nanocrystals had an average size of 26 nm and the specific surface of 35.25 m2/g. Using the prepared Fe3O4 nanocrystals as catalyst, the phenol in wastewater was efficiently degraded by H2O2. The degradability of the phenol was investigated by FT-IR, HPLC and UV–visible spectrophotometer, and the experimental results showed that the phenol was efficiently degraded by H2O2 and the Fe3O4 nanocrystals could be efficiently recycled. Finally, the possible catalytic reaction mechanisms and pathways of phenol degradation were discussed.


2000 ◽  
Vol 158 (1) ◽  
pp. 5-17 ◽  
Author(s):  
Eric G. Derouane ◽  
Heyong He ◽  
Sharifah B. Derouane-Abd Hamid ◽  
Denis Lambert ◽  
Irina Ivanova

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