Downer fluidized bed reactor modeling for catalytic propane oxidative dehydrogenation with high propylene selectivity

Rostom, Samira; Lasa, Hugo de

doi:10.1016/j.cep.2019.02.002

Cited by 21 publications

(14 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversion was relatively low at around 28% for single particle flow and 20% for cluster particle flow. The reaction temperature was 823 K at the top of the reactor [41]. Choi et al reported higher conversion of 45%, which was reached in packed bed membrane reactor with temperature of 650 • C and a propane flow of 4000 kmol/h over the Na-doped Cr 2 O 3 -Al 2 O 3 catalyst.…”

Section: Ethane Dehydrogenationmentioning

confidence: 99%

“…The effect of Pt cluster size revealed that smaller clusters result in higher TOF, lower selectivity and higher deactivation rate [34]. Although Pt is the most commonly used catalyst in the PDH process, studies with other types of catalysts (V/ZrO 2 -γAl 2 O 3 [41], Cr 2 O 3 -Al 2 O 3 [11], g-C 3 N 4 [44], etc.) showed comparable results.…”

Section: Ethane Dehydrogenationmentioning

confidence: 99%

“…To reduce coke deposition and catalyst deactivation, thus increasing the catalyst lifetime, an oxidant can be used instead [44]. In oxidative PDH, coke deposition is slower due to lower operating temperatures, resulting also in higher yields [41].…”

Section: Coke Formation and Catalyst Deactivationmentioning

confidence: 99%

See 2 more Smart Citations

Ab Initio Multiscale Process Modeling of Ethane, Propane and Butane Dehydrogenation Reactions: A Review

et al. 2020

View full text Add to dashboard Cite

Olefins are among the most important structural building blocks for a plethora of chemical reaction products, including petrochemicals, biomaterials and pharmaceuticals. An ever-increasing economic demand has urged scientists, engineers and industry to develop novel technical methods for the dehydrogenation of parent alkane molecules. In particular, the catalysis over precious metal or metal oxide catalysts has been put forward as an alternative way route to thermal-, steam- and fluid catalytic cracking (FCC). Multiscale system modeling as a tool to theoretically understand processes has in the past decade period evolved from a rudimentary measurement-complementing approach to a useful engineering environment. Not only can it predict various experimentally obtained parameters, such as conversion, activity, and selectivity, but it can help us to simulate trends, when changing applicative operating conditions, such as surface gas temperature or pressure, or even support us in the search for the type of materials, their geometrical properties and phases for a better functional performance. An overview of the current set state of the art for saturated organic short chain hydrocarbons (ethane, propane and butane) is presented. Studies that combine at least two different dimensional scales, ranging from atomistic-, bridging across mechanistic mesoscale kinetics, towards reactor- or macroscale, are focused on. Insights considering reactivity are compared.

show abstract

Section: Ethane Dehydrogenationmentioning

confidence: 99%

Section: Ethane Dehydrogenationmentioning

confidence: 99%

See 1 more Smart Citation

Ab Initio Multiscale Process Modeling of Ethane, Propane and Butane Dehydrogenation Reactions: A Review

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Recently, Rostom et al [121] reported a downer fluidized bed reactor simulation using a hybrid CPFD Barracuda software, which represents the catalyst particles as particle clusters. The kinetics established using experimental data were incorporated in the simulation.…”

Section: Circulating Fluidized Bed Reactor Models For Podhmentioning

confidence: 99%

“…This catalytic reaction leads to higher olefin selectivity, securing a much more energy efficient route for olefin production. To accomplish this, Rostom et al [121] recently reported an industrial PODH process, where the PODH catalyst is circulated between a PODH reactor and a catalyst regenerator unit. After leaving the PODH reactor, the catalyst is divided in a splitter.…”

Section: Podh Industrial Prospectsmentioning

confidence: 99%

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

Rostom

Lasa

2020

Catalysts

View full text Add to dashboard Cite

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.

show abstract

Kinetic modelling of 1, 3, 5‐triisopropylbenzene catalytic cracking using a CREC Riser Simulator emulating FCC operation: The C/O ratio effect

2023

View full text Add to dashboard Cite

The present study establishes the suitability of a kinetic model for the catalytic cracking of 1, 3, 5‐triisopropylbenze (TIPB) using the data obtained in the Chemical Reactor Engineering Centre (CREC) Riser Simulator. The postulated kinetic model accounts for both the TIPB and the various major products formed experimentally, such as: 1, 3‐diisopropylbenzene, isopropylbenzene, benzene, propylene, and coke. It is proven that the proposed kinetics is suitable to describe the chemical concentration changes in a CREC Riser Simulator at various reaction times, partial pressures, temperatures, and C/O (catalyst/feedstock) ratios. It is demonstrated that the proposed kinetics simulates well the experimental data from the CREC Riser Simulator, including an experimentally observed C/O optimum ratio. It is anticipated that this type of kinetic model, accounting for intrinsic kinetics, coke deactivation, and diffusional phenomena, could have significant value in establishing the influence of catalyst solid fluxes, at set hydrocarbon feed fluxes, in both industrial riser and downer fluid catalytic cracking (FCC) units.

show abstract

Downer fluidized bed reactor modeling for catalytic propane oxidative dehydrogenation with high propylene selectivity

Cited by 21 publications

References 56 publications

Ab Initio Multiscale Process Modeling of Ethane, Propane and Butane Dehydrogenation Reactions: A Review

Ab Initio Multiscale Process Modeling of Ethane, Propane and Butane Dehydrogenation Reactions: A Review

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

Kinetic modelling of 1, 3, 5‐triisopropylbenzene catalytic cracking using a CREC Riser Simulator emulating FCC operation: The C/O ratio effect

Contact Info

Product

Resources

About