Role of Ceria in Oxidative Dehydrogenation on Supported Vanadia Catalysts

2010 ◽  
Vol 132 (7) ◽  
pp. 2345-2349 ◽  
Author(s):  
Maria Veronica Ganduglia-Pirovano ◽  
Cristina Popa ◽  
Joachim Sauer ◽  
Heather Abbott ◽  
Alexander Uhl ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Vanadia Catalysts

scholarly journals Role of CO2 During Oxidative Dehydrogenation of Propane Over Bulk and Activated-Carbon Supported Cerium and Vanadium Based Catalysts

2021 ◽  
Author(s):  
Petar Djinović ◽  
Janez Zavašnik ◽  
Janvit Teržan ◽  
Ivan Jerman
Keyword(s):  
Catalytic Activity ◽  
Activated Carbon ◽  
Oxidative Dehydrogenation ◽  
Active Phase ◽  
Lattice Oxygen ◽  
Chemisorbed Oxygen ◽  
Catalytically Active ◽  
Temperature Programmed ◽  
Propane Cracking

AbstractCeO2, V2O5 and CeVO4 were synthesised as bulk oxides, or deposited over activated carbon, characterized by XRD, HRTEM, CO2-TPO, C3H8-TPR, DRIFTS and Raman techniques and tested in propane oxidative dehydrogenation using CO2. Complete oxidation of propane to CO and CO2 is favoured by lattice oxygen of CeO2. The temperature programmed experiments show the ~ 4 nm AC supported CeO2 crystallites become more susceptible to reduction by propane, but less prone to re-oxidation with CO2 compared to bulk CeO2. Catalytic activity of CeVO4/AC catalysts requires a 1–2 nm amorphous CeVO4 layer. During reaction, the amorphous CeVO4 layer crystallises and several atomic layers of carbon cover the CeVO4 surface, resulting in deactivation. During reaction, V2O5 is irreversibly reduced to V2O3. The lattice oxygen in bulk V2O5 favours catalytic activity and propene selectivity. Bulk V2O3 promotes only propane cracking with no propene selectivity. In VOx/AC materials, vanadium carbide is the catalytically active phase. Propane dehydrogenation over VC proceeds via chemisorbed oxygen species originating from the dissociated CO2. Graphic Abstract

scholarly journals Role of dispersion of vanadia on SBA-15 in the oxidative dehydrogenation of propane

2010 ◽  
Vol 157 (1-4) ◽  
pp. 137-142 ◽  
Author(s):  
Philipp Gruene ◽  
Till Wolfram ◽  
Katrin Pelzer ◽  
Robert Schlögl ◽  
Annette Trunschke
Keyword(s):  
Oxidative Dehydrogenation ◽  
Oxidative Dehydrogenation Of Propane

scholarly journals On the catalytic role of superficial VOx species and coke deposited on mesoporous MgO replica in oxidative dehydrogenation of ethylbenzene

2020 ◽  
Vol 504 ◽  
pp. 144336
Author(s):  
Sebastian Jarczewski ◽  
Marek Drozdek ◽  
Piotr Michorczyk ◽  
Carlos Cuadrado-Collados ◽  
Jesus Gandara-Loe ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Catalytic Role ◽  
Dehydrogenation Of Ethylbenzene ◽  
Oxidative Dehydrogenation Of Ethylbenzene

Role of TiO2 nanoparticle modification of Cr/MCM41 catalyst to enhance Cr-support interaction for oxidative dehydrogenation of ethane with carbon dioxide

2019 ◽  
Vol 584 ◽  
pp. 117114 ◽  
Author(s):  
Abdulrhman S. Al-Awadi ◽  
Ahmed Mohamed El-Toni ◽  
Saeed M. Al-Zahrani ◽  
Ahmed E. Abasaeed ◽  
Mansour Alhoshan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Oxidative Dehydrogenation ◽  
Tio2 Nanoparticle ◽  
Support Interaction ◽  
Oxidative Dehydrogenation Of Ethane

Role of C−H Bond Strength in the Rate and Selectivity of Oxidative Dehydrogenation of Alkanes

2009 ◽  
Vol 113 (28) ◽  
pp. 12380-12386 ◽  
Author(s):  
Michael Zboray ◽  
Alexis T. Bell ◽  
Enrique Iglesia
Keyword(s):  
Bond Strength ◽  
Oxidative Dehydrogenation
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