VO x -Nb/La-γAl 2 O 3 catalysts for oxidative dehydrogenation of ethane to ethylene

Propane Oxidative Dehydrogenation Using Consecutive Feed Injections and Fluidizable VOx/γAl2O3 and VOx/ZrO2–γAl2O3 Catalysts

“…Here, the oxygen source is the catalyst lattice oxygen, with this having the potential to improve olefin selectivity. Typical examples of catalysts for ethane ODH are VO x / γAl 2 O 3 −ZrO 2 , 42,43 VO x −Nb/La−γAl 2 O 3 , 44 VO x −MoO x / γAl 2 O 3 , 2 and VO x /c-Al 2 O 3 . 12 With respect to PODH, VO x / γAl 2 O 3 7 and VO x /CaO−γAl 2 O 3 8 catalysts have been reported in previous studies.…”

Kinetics of Oxidative Dehydrogenation of n-Butane to C4-Olefins over a VOx/CeO2–γAl2O3 Catalyst in Gas-Phase Oxygen-Free Conditions

“…While taking this into consideration, one should note that there are studies reported in the open literature that investigate the various metal/support containing ODH catalysts. Among the studied materials, vanadium oxide-based catalysts were shown to be good candidates for ODH. ,,, The present research group also recently investigated a series of CeO 2 -modified VO x -based catalysts for the ODH of alkanes. , …”

“…A selective catalyst and a controlled oxygen supply can also enhance the olefin selectivity significantly. , The availability of oxygen can be controlled by using solid-phase oxygen instead of gas-phase oxygen to carry out the ODH reaction. , Metal oxide-based catalysts serve both as catalysts and as a source of solid-phase oxygen. , In fact, the catalyst oxygen plays a vital role in controlling the olefin selectivity. However, this depends on the type and amount of lattice oxygen present in the catalyst. , The overall reaction of n -butane to C4-olefins can be divided into two subcategories, namely (i) the ODH of n -butane to C4-olefins, and (ii) the complete oxidation of n -butane and/C4-olefins into carbon dioxide, as shown in eqs –. The ODH is the desired reaction as it provides a direct route for C4-olefin production, while the other two reactions are responsible for the production of undesired lighter hydrocarbon and CO 2 products …”

“…However, this depends on the type and amount of lattice oxygen present in the catalyst. 11,12 The overall reaction of n-butane to C4-olefins can be divided into two subcategories, namely (i) the ODH of nbutane to C4-olefins, and (ii) the complete oxidation of nbutane and/C4-olefins into carbon dioxide, as shown in eqs 1−3. The ODH is the desired reaction as it provides a direct route for C4-olefin production, while the other two reactions are responsible for the production of undesired lighter hydrocarbon and CO 2 products.…”

“…Among the studied materials, vanadium oxide-based catalysts were shown to be good candidates for ODH. 3,4,11,12 The present research group also recently investigated a series of CeO 2 -modified VO x -based catalysts for the ODH of alkanes. 14,15 Regarding the ODH kinetics, there are only handful of studies that investigated the alternative mechanism and models for ODH of n-butane to produce olefins.…”