Recent Advances in Metal−Zeolite Catalysts for Direct Propane Dehydrogenation

Zhang, Bofeng; Song, Mingxia; Xu, Mingrui; Liu, Guozhu

doi:10.1021/acs.energyfuels.3c03138

Cited by 4 publications

(2 citation statements)

References 132 publications

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“…Synthetic plastics, rubber, and fiber are the three major synthetic materials; their important raw material is propylene. , In addition, polypropylene protective equipment played an important role during the coronavirus disease . With the emergence of shale gas, propane dehydrogenation (PDH) has emerged as a significant alternative technique for producing propylene, as the conventional methods of producing the chemicalfluid catalytic cracking of heavy oil and steam cracking of naphthahave increasingly become insufficient to fulfill the growing demand. − Cr-based and Pt-based catalysts are the main catalysts for PDH. Although the Cr-based catalyst is cheap, it is poisonous, and it is not environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

Copper-Promoted Platinum Supported on HSSZ-13 Zeolite Catalysts for Propane Dehydrogenation to Propylene

Fu,

Ma,

Qian

et al. 2024

Energy Fuels

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Pt/HSSZ-13 with 0.5−3 wt % Pt load and PtCu/ HSSZ-13 with 1−7 wt % Cu load were prepared by the initial wetness impregnation method. Without compromising the original crystal structure and surface texture characteristics, doped Pt and Cu are dispersed uniformly throughout the surface. The Si/Al molar ratio affected not only the texture of the crystal but also the number of acid sites on the catalyst surface. The appropriate addition of Cu significantly increased the dispersion of Pt. The addition of Cu also provided electrons to Pt, affected the electron cloud density on the surface of Pt, and then reduced the adsorption of propylene and improved the selectivity of propylene. Cu can also decrease the number of acidic sites on the catalyst surface, thus slowing the deactivation rate of the catalyst and the amount of carbon deposition during the reaction. 1.0Pt3.0Cu/HSSZ-13(40) had a small number of strong acid sites (3.89 μmol/g) and showed the best propane initial conversion (73.95%), excellent propylene selectivity (97.60%), lowest deactivation constant (0.33 h −1 ), and good regeneration robustness.

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Section: Introductionmentioning

confidence: 99%

Copper-Promoted Platinum Supported on HSSZ-13 Zeolite Catalysts for Propane Dehydrogenation to Propylene

Fu,

Ma,

Qian

et al. 2024

Energy Fuels

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“…Under such harsh conditions (i.e., high temperature, strongly reductive atmosphere), undesired chemical processes such as carbon–carbon cracking and over dehydrogenation take place, causing catalyst deactivation due to coke deposition, thereby requiring frequent regeneration. As a result, developing advanced catalysts possessing high selectivity, outstanding activity, robust stability, and excellent anticoking capability has been a focus of research in PDH. − …”

Section: Introductionmentioning

confidence: 99%

Highly Active and Stable Isolated Ir^δ+ Sites in Iridium Phosphide for Propane Dehydrogenation

Zhang,

Zhao,

Wang

et al. 2024

Energy Fuels

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Developing highly stable catalysts at high temperatures while maintaining high activity and selectivity has been a focus of research for propane dehydrogenation (PDH). Herein, we report the catalytic properties of Ir δ+ sites isolated by phosphorus in iridium phosphide (IrP 2 ) as ultrastable and active catalysts for PDH. Like other transition and main group single-site catalysts, the IrP 2 catalysts exhibit remarkable propylene selectivity (99%). Notably, the optimized IrP 2 catalyst has a PDH rate of 0.418 mol C 3 H 6 per mole of Ir per second, which represents an approximately 400-fold increase compared to that of Ir NPs and is significantly higher than that of conventional, ionic singlesite catalysts. Furthermore, it exhibited a robust stability up to a week with little deactivation. A series of advanced characterizations, including in situ X-ray absorption spectroscopy, scanning transmission electron microscopy, and in situ X-ray photoelectron spectroscopy, elucidated that the isolated Ir δ+ ions are the active sites for PDH.

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Hydrothermal synthesis of highly cross‐linked PtZn@Silicalite‐1 structured catalysts for propane dehydrogenation

Xia,

Zhang,

Hou

et al. 2024

AIChE Journal

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Structured catalysts coatings exhibit excellent performance on non‐adiabatic gas–solid process, deriving from their enhanced heat and mass transfer properties. However, the coating catalysts prepared by traditional hydrothermal method of zeolite encapsulating noble metal are prone to spalling, especially under conditions of large flow rate and high temperature. Herein, we prepared PtZn clusters encapsulated in silicalite‐1 zeolite coating on stainless steel with high bonding strength by an improved in situ growth method. The optimized catalyst exhibited ultra‐thin, uniform, continuous, and high degree of crosslinking, thereby enhancing mass transfer and thermal stability. In propane dehydrogenation reaction, the optimized PtZn@S‐1‐R showed a high specific activity of 14.7 molPt−1 s−1 and a propylene selectivity above 99% at 600°C with a high weight hourly space velocity of 120 h−1. The metal‐encapsulated zeolite coating catalysts broaden the application avenue for heterogeneous catalysis with great application prospects.

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Recent Advances in Metal−Zeolite Catalysts for Direct Propane Dehydrogenation

Cited by 4 publications

References 132 publications

Copper-Promoted Platinum Supported on HSSZ-13 Zeolite Catalysts for Propane Dehydrogenation to Propylene

Copper-Promoted Platinum Supported on HSSZ-13 Zeolite Catalysts for Propane Dehydrogenation to Propylene

Highly Active and Stable Isolated Ir^δ+ Sites in Iridium Phosphide for Propane Dehydrogenation

Hydrothermal synthesis of highly cross‐linked PtZn@Silicalite‐1 structured catalysts for propane dehydrogenation

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Recent Advances in Metal−Zeolite Catalysts for Direct Propane Dehydrogenation

Cited by 4 publications

References 132 publications

Copper-Promoted Platinum Supported on HSSZ-13 Zeolite Catalysts for Propane Dehydrogenation to Propylene

Copper-Promoted Platinum Supported on HSSZ-13 Zeolite Catalysts for Propane Dehydrogenation to Propylene

Highly Active and Stable Isolated Irδ+ Sites in Iridium Phosphide for Propane Dehydrogenation

Hydrothermal synthesis of highly cross‐linked PtZn@Silicalite‐1 structured catalysts for propane dehydrogenation

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Highly Active and Stable Isolated Ir^δ+ Sites in Iridium Phosphide for Propane Dehydrogenation