A high-throughput reactor system for optimization of Mo–V–Nb mixed oxide catalyst composition in ethane ODH

2015 ◽  
Vol 5 (8) ◽  
pp. 4164-4173 ◽  
Author(s):  
Haibo Zhu ◽  
Paco Laveille ◽  
Devon C. Rosenfeld ◽  
Mohamed Nejib Hedhili ◽  
Jean-Marie Basset
Keyword(s):  
Oxidative Dehydrogenation ◽  
High Throughput ◽  
Mixed Oxide ◽  
Oxide Catalyst ◽  
Dehydrogenation Reaction ◽  
Mixed Oxide Catalysts ◽  
Catalyst Composition ◽  
P 75 ◽  
Mixed Oxide Catalyst ◽  
Ethane Oxidative Dehydrogenation

75 Mo–V–Nb mixed oxide catalysts with a broad range of compositions were tested using a high-throughput reactor in order to optimize the composition for the ethane oxidative dehydrogenation reaction.

Dynamic and Steady State Analysis of Low Temperature Ethane Oxidative Dehydrogenation over Chromia and Chromia-Vanadia Catalysts

2007 ◽  
Vol 5 (1) ◽  
Author(s):  
Gulsun Karamullaoglu ◽  
Timur Dogu
Keyword(s):  
Gas Phase ◽  
Oxidative Dehydrogenation ◽  
Mixed Oxide ◽  
Oxide Catalyst ◽  
Feed Ratio ◽  
Mixed Oxide Catalysts ◽  
Mixed Oxide Catalyst ◽  
Dynamic Experiments ◽  
Ethane Oxidative Dehydrogenation ◽  
Ethylene Selectivity

Oxidative dehydrogenation of ethane to ethylene was investigated over Chromia and Cr-V mixed oxide catalysts synthesized following a complexation procedure. With an O2/C2H6 feed ratio of 0.17, Chromia exhibited a total conversion value of about 0.20 at 447°C (at a space time of 0.24 s.g/mL) with an ethylene selectivity of 0.82. Chromia catalyst was more active than Cr-V mixed oxide at temperatures as low as 200°C. Pulse-response experiments carried out with ethane pulses injected into O2-He indicated the presence of at least two different sites for the formation of CO2 and H2O over Chromia catalyst. In the dynamic experiments carried out with the Cr-V mixed oxide catalyst and by injecting O2 pulses into a gas stream containing a mixture of C2H6 and He, formation of CO rather than C2H4 was favored. Results of the dynamic runs carried out without gas phase oxygen strengthened the conclusion of lattice oxygen participation in the selective oxidation of ethane reaction through a redox mechanism.

Oxidative dehydrogenation of ethane over a Mo–V–Nb–Te–O mixed-oxide catalyst in a cyclic mode

2017 ◽  
Vol 58 (2) ◽  
pp. 156-160 ◽  
Author(s):  
I. I. Mishanin ◽  
A. N. Kalenchuk ◽  
K. I. Maslakov ◽  
V. V. Lunin ◽  
A. E. Koklin ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Mixed Oxide ◽  
Oxide Catalyst ◽  
Cyclic Mode ◽  
Oxidative Dehydrogenation Of Ethane ◽  
Mixed Oxide Catalyst

scholarly journals Kinetic Study of Oxidative Dehydrogenation of Ethane over MoVTeNb Mixed-Oxide Catalyst

2013 ◽  
Vol 53 (5) ◽  
pp. 1775-1786 ◽  
Author(s):  
Jaime S. Valente ◽  
R. Quintana-Solórzano ◽  
H. Armendáriz-Herrera ◽  
G. Barragán-Rodríguez ◽  
J. M. López-Nieto
Keyword(s):  
Kinetic Study ◽  
Oxidative Dehydrogenation ◽  
Mixed Oxide ◽  
Oxide Catalyst ◽  
Oxidative Dehydrogenation Of Ethane ◽  
Mixed Oxide Catalyst

The CO Oxidation Mechanism Over Ag-Co And Co-Ce Mixed Oxide Catalysts

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Filiz Balikçi Derekaya ◽  
Cigdem Guldur
Keyword(s):  
Mixed Oxide ◽  
Oxide Catalyst ◽  
Co Adsorption ◽  
Oxidation Mechanism ◽  
Oxide Catalysts ◽  
Oxygen Species ◽  
Surface Oxygen ◽  
Mixed Oxide Catalysts ◽  
Mixed Oxide Catalyst ◽  
Langmuir Hinshelwood Mechanism

Carbonmonoxide oxidation mechanism was studied over the 50/50 Ag-Co and 50/50 Co-Ce mixed oxide catalysts. The temperature programmed methods (TPR-H2 and TPD-CO) were used to characterize the catalysts. FTIR spectrums were collected under different feed conditions in order to determine the reaction mechanism. The carbonates adsorption bands and gas phase CO2 bands were obtained for both of the catalysts. CO linearly bounded to Ag+ sites at 2164 cm-1 and to Co3+ sites at 2105 cm-1 for 50/50 Ag-Co mixed oxide catalyst. CO linearly bounded to Co3+ sites at 2173 cm-1 and 2108 cm-1 for 50/50 Co-Ce mixed oxide catalyst. The CO adsorption studies showed that the CO reacted with surface oxygen species. The CO2 adsorbed on the catalyst surface as surface carbonate species. The oxidation of CO with surface oxygen species is probably via a non-competitive Langmuir-Hinshelwood mechanism on the catalysts.

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