Kinetic modeling of oxidative dehydrogenation of propane (ODHP) over a vanadium–graphene catalyst: Application of the DOE and ANN methodologies

Fattahi, Moslem; Kazemeini, Mohammad; Khorasheh, Farhad; Rashidi, Alimorad

doi:10.1016/j.jiec.2013.09.056

Cited by 53 publications

(27 citation statements)

References 37 publications

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“…The study on the regeneration reaction of the K 2 CO 3 /Al 2 O 3 adsorbent reveals that the regeneration of this adsorbent is carried out in three stages as the final temperature increases. In addition, based on the Carberry and Wheeler Weisz criteria, the absorbents are affected by the intrinsic diffusion restriction under this evaluation condition 26–28 . Therefore, the first stage is the superficial KHCO 3 regeneration reaction, the second stage is the inner KHCO 3 regeneration reaction and the third stage is the regeneration of KAl (CO 3 ) 2 (OH) 2 products.…”

Section: Resultsmentioning

confidence: 99%

Regeneration reaction characteristics and mechanism model of K₂CO₃/Al₂O₃ sorbent for CO₂ capture

Zhang

Chen

2020

Asia-Pacific J Chem Eng

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The regeneration reaction characteristics of the K2CO3/Al2O3 sorbent were investigated with a thermogravimetric apparatus. The effects of the gas composition and temperature on the regeneration conversion and reaction rate were analysed extensively. The results of the thermogravimetric experiment revealed that the regeneration characteristics of K2CO3/Al2O3 are better than those of pure K2CO3 and that temperature is the key parameter for the K2CO3/Al2O3 regeneration process. It was also observed that the regeneration process of K2CO3/Al2O3 occurred in three stages. As the regeneration temperature increased, regeneration occurred in the following sequence: KHCO3 on the external surface, KHCO3 on the internal surface and KAl (CO3)2(OH)2. The activation energy (E, kJ/mol) and pre‐index factor (A, min−1) of the three stages were 69.7, 73.8 and 84.5 and 1.36 × 107, 1.86 × 107 and 2.74 × 106, respectively. The reaction kinetic parameters were calculated by the thermal analysis method. A comprehensive model based on the Avrami–Erofeev reaction mechanism model was proposed for the regeneration process of K2CO3/Al2O3. The model data and test values agreed well, thereby establishing the model's accuracy. This paper provides fundamental data for further study on the capture of carbon dioxide from flue gas using potassium‐based sorbents.

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Section: Resultsmentioning

confidence: 99%

Regeneration reaction characteristics and mechanism model of K₂CO₃/Al₂O₃ sorbent for CO₂ capture

Zhang

Chen

2020

Asia-Pacific J Chem Eng

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“…RSM is considered to be a practical and easy way to optimize a given process based upon the experimental data [30,31]. In the current study, Design Experts Software (Version 8.0.1) was employed for designing experiments, mathematical modeling, and optimization.…”

Section: Resultsmentioning

confidence: 99%

Oxidation of H2S to Elemental Sulfur over Alumina Based Nanocatalysts: Synthesis and Physiochemical Evaluations

Rezaee¹,

Kazemeini

Fattahi

et al. 2016

Scientia Iranica

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In this paper, oxidation of H 2 S into elemental sulfur over synthesized aluminabased nanocatalysts was physiochemically investigated and the results were compared with a commercial Claus catalyst. The wet chemical, co-precipitation, and spray pyrolysis techniques were employed to synthesize several alumina nanostructures. Then, the SEM, XRD, and ASAP analysis methods were utilized to characterize in order to choose the best nanocatalyst. The sulfur and H 2 S contents were determined through the standard UOP techniques. Amongst the synthesized materials, Al2O3-supported sodium oxide prepared through the wet chemical, and Al 2 O 3 nanocatalysts via spray pyrolysis methods were the most active catalysts for the purpose at hand. In addition, the TiO2 nanostructure and a hybrid of nano alumina support (made via the wet chemical method), decorated on the carbon nanotube, were prepared for this goal. Ultimately, the best chemically characterized nanocatalyst was subjected to evaluations in a xed bed reactor while e ects of temperature, metal loading, and GHSV were understudied. It was observed that the alumina nanoparticles prepared through the wet chemical and spray pyrolysis methods led H 2 S into elemental sulfur in a reproducible manner with 97 and 98% conversions, respectively. Both of these methods were more desirable than utilizing the commercial catalysts (i.e. CR-3S and CRS-31) providing nearly 96% conversion.

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“…Most of the ODH literature references consider fixed-bed type reactors, mainly due to their perceived operational simplicity [8,40,74,[113][114][115]. For instance, temperature gradients can hardly be eliminated in a traditional fixed-bed reactor unless the catalyst bed is diluted with inert particles while using a large inert particle/catalyst particle ratio.…”

Section: Fixed-bed Reactorsmentioning

confidence: 99%

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

Rostom

Lasa

2020

Catalysts

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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.

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Kinetic modeling of oxidative dehydrogenation of propane (ODHP) over a vanadium–graphene catalyst: Application of the DOE and ANN methodologies

Cited by 53 publications

References 37 publications

Regeneration reaction characteristics and mechanism model of K₂CO₃/Al₂O₃ sorbent for CO₂ capture

Regeneration reaction characteristics and mechanism model of K₂CO₃/Al₂O₃ sorbent for CO₂ capture

Oxidation of H2S to Elemental Sulfur over Alumina Based Nanocatalysts: Synthesis and Physiochemical Evaluations

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

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Kinetic modeling of oxidative dehydrogenation of propane (ODHP) over a vanadium–graphene catalyst: Application of the DOE and ANN methodologies

Cited by 53 publications

References 37 publications

Regeneration reaction characteristics and mechanism model of K2CO3/Al2O3 sorbent for CO2 capture

Regeneration reaction characteristics and mechanism model of K2CO3/Al2O3 sorbent for CO2 capture

Oxidation of H2S to Elemental Sulfur over Alumina Based Nanocatalysts: Synthesis and Physiochemical Evaluations

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

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Regeneration reaction characteristics and mechanism model of K₂CO₃/Al₂O₃ sorbent for CO₂ capture

Regeneration reaction characteristics and mechanism model of K₂CO₃/Al₂O₃ sorbent for CO₂ capture