Kinetic modeling of side reactions in propane dehydrogenation over Pt - Sn/γ - Al2O3 catalyst

Farjoo, Afrooz; Khorasheh, Farhad; Niknaddaf, Saeid; Soltani, Mohammad

doi:10.1016/j.scient.2011.05.009

Cited by 25 publications

(13 citation statements)

References 7 publications

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“…[4] Clinoptilolite, discovered in 1923, is one of the most common natural zeolites. [10,11] Dehydrogenation of light hydrocarbons is industrially important for production of petrochemical products [12] and membrane reactors are use to boost the production yield. The dimension of the largest channel of clinoptilolite framework is 0.55 Â 0.4 nm (5.5 Â 4.0 Å).…”

Section: Introductionmentioning

confidence: 99%

“…[6,7] Various natural zeolite membranes have been reported for separation of hydrogen from H 2 /CO 2 [8,9] or light hydrocarbons. [10,11] Dehydrogenation of light hydrocarbons is industrially important for production of petrochemical products [12] and membrane reactors are use to boost the production yield. Avila et al [13] used natural mordenite in ethane dehydrogenation reaction to remove hydrogen selectively and achieve an equilibrium shift.…”

Section: Introductionmentioning

confidence: 99%

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H₂ separation using tubular stainless steel supported natural clinoptilolite membranes

Farjoo

Kuznicki

2016

Can J Chem Eng

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Disk membranes generated from high-purity natural clinoptilolite mineral rock have shown promising hydrogen separation performance. To scale up production of these types of membranes for industrial gas separation, a coating strategy was devised. A mixture of natural clinoptilolite and aluminum silicate was deposited on the inner surface of porous stainless steel tubes by the slip casting technique. Phase composition and morphology of the coating materials were investigated using X-ray diffraction. The performance was evaluated for a range of gases using single gas permeation tests at different temperatures and pressures. Introduction of the second layer significantly improved the performance of the membrane system. The experiments on the double-layered membranes measured a hydrogen permeance of 1.65 Â 10 À7 mol Á m À2 Á s À1 Á Pa À1 at 300 8C. H 2 /CO 2 and H 2 /C 2 H 6 single gas selectivity was 10.2 and 8.45 respectively at 25 8C and feed pressure of 110 kPa. These results show that natural zeolite coated stainless steel tubular membranes have high potential for large-scale gas separation at high temperature requirements.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

H₂ separation using tubular stainless steel supported natural clinoptilolite membranes

Farjoo

Kuznicki

2016

Can J Chem Eng

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“…Temperature increases beyond 650 • C may result in a significant reduction of propylene yield due to the higher influence of unselective thermal reactions [112]. Thus, thermal levels above 650 • C for PODH are not recommended.…”

Section: Effect Of Reaction Temperaturementioning

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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“…In order to improve the selectivity of H 2 separation, An et al used a cation exchange modification method to examine the effect of the type and size of the extra framework cations on removal of hydrogen. Dehydrogenation of light hydrocarbons is industrially important for production of chemical products . The production yield in this reaction can be enhanced by using inorganic membranes as selective extractors of the product species.…”

Section: Introductionmentioning

confidence: 99%

“…Dehydrogenation of light hydrocarbons is industrially important for production of chemical products. [32,33] The production yield in this reaction can be enhanced by using inorganic membranes as selective extractors of the product species. Avila et al [34] used natural mordenite in a membrane reactor to remove hydrogen selectively and achieved an equilibrium shift in ethane dehydrogenation reaction.…”

Section: Introductionmentioning

confidence: 99%

H₂ separation using pressed clinoptilolite and mixed copper‐clinoptilolite disc membranes

2016

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Disc membranes machined from high‐purity natural clinoptilolite rocks demonstrated promising hydrogen separation efficiency. However, these membranes cannot be adequately scaled up. To overcome this and provide process flexibility, mixed matrix membranes are required, pairing small particles of natural zeolite with a binder system. A novel approach was determined to use metals as binders and was tested by comparing natural clinoptilolite compact disc membranes with and without powdered copper metal. The phase composition and morphology of the discs were characterized and gas separation performance was evaluated using single gas permeation tests. Membrane selectivity for hydrogen separation was improved by applying metallic copper and copper oxide, filling a portion of the inter‐particle spaces and creating adhesion with the zeolite particles.

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Kinetic modeling of side reactions in propane dehydrogenation over Pt - Sn/γ - Al2O3 catalyst

Cited by 25 publications

References 7 publications

H₂ separation using tubular stainless steel supported natural clinoptilolite membranes

H₂ separation using tubular stainless steel supported natural clinoptilolite membranes

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

H₂ separation using pressed clinoptilolite and mixed copper‐clinoptilolite disc membranes

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Kinetic modeling of side reactions in propane dehydrogenation over Pt - Sn/γ - Al2O3 catalyst

Cited by 25 publications

References 7 publications

H2 separation using tubular stainless steel supported natural clinoptilolite membranes

H2 separation using tubular stainless steel supported natural clinoptilolite membranes

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

H2 separation using pressed clinoptilolite and mixed copper‐clinoptilolite disc membranes

Contact Info

Product

Resources

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H₂ separation using tubular stainless steel supported natural clinoptilolite membranes

H₂ separation using tubular stainless steel supported natural clinoptilolite membranes

H₂ separation using pressed clinoptilolite and mixed copper‐clinoptilolite disc membranes