Propane Oxidative Dehydrogenation on Vanadium-Based Catalysts under Oxygen-Free Atmospheres

Abstract

Catalytic propane oxidative dehydrogenation (PODH) in the absence of gas phase oxygen is a promising approach for propylene manufacturing. PODH can overcome the issues of over-oxidation, which lower propylene selectivity. PODH has a reduced environmental footprint when compared with conventional oxidative dehydrogenation, which uses molecular oxygen and/or carbon dioxide. This review discusses both the stoichiometry and the thermodynamics of PODH under both oxygen-rich and oxygen-free atmospheres. This article provides a critical review of the promising PODH approach, while also considering vanadium-based catalysts, with lattice oxygen being the only oxygen source. Furthermore, this critical review focuses on the advances that were made in the 2010–2018 period, while considering vanadium-based catalysts, their reaction mechanisms and performances and their postulated kinetics. The resulting kinetic parameters at selected PODH conditions are also addressed.

Oxidative Dehydrogenation of Propane into Propene over Chromium Oxides

“…This finding reveals a synergetic effect on the temperature during the calcination process. According to the previous studies, a large amount of lattice oxygen mobility proved to positively affect the catalytic process. − On the other hand, XRD and BET analysis ensued that crystallite grain size increases with higher temperatures, whereas specific surface area decreases. The smallest crystallite size and the highest specific surface area were observed for sample Cr-300, which exhibited the highest catalytic performance at 600 °C.…”

Reshaping the Role of CO2 in Propane Dehydrogenation: From Waste Gas to Platform Chemical

“…CO 2 has the chemical potential for partially reoxidizing the reduced metal oxides formed during ODHP, replenishing oxygen vacancies . For redox materials like V oxides, this occurs via a Mars–van Krevelen (MvK) mechanism, − in which the C–H bond activation proceeds via a lattice oxygen abstracting a H atom from an adsorbed propane molecule coordinated with a neighbor lattice oxygen . For highly valent Cr oxide, there is no consensus: either via a Langmuir–Hinshelwood mechanism or via MvK .…”

Catalytic Membrane Reactors: The Industrial Applications Perspective

“…The oxygen the responses, is provided in a controlled manner [86,87]. The oxidative dehydroge kanes allows olefin production conveniently than dehydrogenation and steam crac process shows no chemical equilibrium limitations as the dehydrogenation and req temperatures than the steam cracking [88]. In 1999, Santamaria and coworkers stud tive dehydrogenation of propane by using a macroporous alumina membrane coat catalyst [89].…”