Effects of Acidic-Basic Properties on Catalytic Activity for the Oxidative Dehydrogenation of Isobutane on Calcium Phosphates, Doped and Undoped with Chromium

2017 ◽  
Vol 50 (2) ◽  
pp. 122-131 ◽  
Author(s):  
Takuya Ehiro ◽  
Hisanobu Misu ◽  
Shinya Nitta ◽  
Yuzo Baba ◽  
Masahiro Katoh ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxidative Dehydrogenation ◽  
Calcium Phosphates ◽  
Basic Properties ◽  
Oxidative Dehydrogenation Of Isobutane

Different Supports-Supported Cr-Based Catalysts for Oxidative Dehydrogenation of Isobutane with CO2

2014 ◽  
Vol 32 (8) ◽  
pp. 1424-1429
Author(s):  
Guosong SUN ◽  
Qingze HUANG ◽  
Huiquan LI ◽  
Haitao LIU ◽  
Zhao ZHANG ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Oxidative Dehydrogenation Of Isobutane

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

Influence of support and kind of VO species on isobutene selectivity and coke deposition in non-oxidative dehydrogenation of isobutane

2016 ◽  
Vol 338 ◽  
pp. 174-183 ◽  
Author(s):  
Uwe Rodemerck ◽  
Sergey Sokolov ◽  
Mariana Stoyanova ◽  
Ursula Bentrup ◽  
David Linke ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Coke Deposition ◽  
Oxidative Dehydrogenation Of Isobutane
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