Propane Dehydrogenation on Single-Site [PtZn4] Intermetallic Catalysts

Chen, Sai; Zhao, Zhi‐Jian; Mu, Rentao; Chang, Xin; Luo, Jun; Purdy, Stephen; Kropf, A. Jeremy; Sun, Guodong; Chen, Pei; Miller, Jeffrey T.; Zhou, X. H.; Vovk, Evgeny I.; Yang, Yong; Gong, Jinlong

doi:10.1016/j.chempr.2020.10.008

Cited by 175 publications

(174 citation statements)

References 37 publications

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“…Further increasing the WHSV C3H8 to 4.5 h −1 contribute little to the r(C 3 H 6 ). In addition, we test the PDH activity under high propane pressure (600°C, WHSV C3H8 = 2.4 h −1 , C 3 H 8 :H 2 = 6:19) 42 . As shown in Figure S21, increasing the propane pressure leads to the loss of conversion.…”

Section: Resultsmentioning

confidence: 99%

In situ encapsulated subnanometric CoO clusters within silicalite‐1 zeolite for efficient propane dehydrogenation

Song

et al. 2021

AIChE Journal

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Cobalt‐based catalysts are promising alternatives to replace Pt‐ and Cr‐based catalysts for propane dehydrogenation (PDH). However, the sintering and reduction of unstable Co sites cause fast deactivation. Herein, the ultrasmall cobalt oxide clusters encapsulated within silicalite‐1 zeolites (CoO@S‐1) has been obtained via a ligand assistance in situ crystallization method. This CoO@S‐1 catalyst exhibits an attractive propylene formation rate of 13.66 mmolC3H6·gcat−1·h−1 with selectivity of >92% and is durable during 120‐h PDH reaction with five successive regeneration cycles. The high PDH activity of CoO@S‐1 is assigned to the encapsulated CoO clusters are favorable for propane adsorption and can better stabilize the detached H* species from propane, leading to the lower dehydrogenation barriers than framework Co2+ cations and Co3O4 nanoparticles. Additionally, the π‐binding propylene on CoO clusters can prevent the over‐dehydrogenation reaction compared with the di‐σ binding propylene on metallic Co, leading to the superior propylene selectivity and catalytic stability.

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Section: Resultsmentioning

confidence: 99%

In situ encapsulated subnanometric CoO clusters within silicalite‐1 zeolite for efficient propane dehydrogenation

Song

et al. 2021

AIChE Journal

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“…Among these reported precious metals, Pt-based catalysts have been successfully applied in the industrial Oleflex technology of the DHP. Many strategies were adopted to reduce Pt loading, improve stability, and resist sintering and carbon deposition [10,[136][137][138][139][140].…”

Section: Precious Metal (Pt Rh Ru and Pd) Catalystsmentioning

confidence: 99%

Research progress of CO2 oxidative dehydrogenation of propane to propylene over Cr-free metal catalysts

Wang

et al. 2022

Rare Met.

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CO 2 -assisted oxidative dehydrogenation of propane (CO 2 -ODHP) is an attractive strategy to offset the demand gap of propylene due to its potentiality of reducing CO 2 emissions, especially under the demands of peaking CO 2 emissions and carbon neutrality. The introduction of CO 2 as a soft oxidant into the reaction not only averts the over-oxidation of products, but also maintains the high oxidation state of the redox-active sites. Furthermore, the presence of CO 2 increases the conversion of propane by coupling the dehydrogenation of propane (DHP) with the reverse water gas reaction (RWGS) and inhibits the coking formation to prolong the lifetime of catalysts via the reverse Boudouard reaction. An effective catalyst should selectively activate the C-H bond but suppress the C-C cleavage. However, to prepare such a catalyst remains challenging. Chromium-based catalysts are always applied in industrial application of DHP; however, their toxic properties are harmful to the environment. In this aspect, exploring environment-friendly and sustainable catalytic systems with Cr-free is an important issue. In this review, we outline the development of the CO 2 -ODHP especially in the last ten years, including the structural information, catalytic performances, and mechanisms of chromium-free metal-based catalyst systems, and the role of CO 2 in the reaction. We also present perspectives for future progress in the CO 2 -ODHP.

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“…Other effective bimetallic catalytic systems have been studied, such as the PtZn 4 surface, whose geometric and electronic structures activate the first and second C-H bonds of propane but inhibit the coke formation [23]. The Pt electronic features on boron nitride nanosheets can be adjusted by rational deposition on the support so that different charge states show different catalytic performances in PDH reaction [24].…”

Section: Theoretical Studiesmentioning

confidence: 99%

Propylene Synthesis: Recent Advances in the Use of Pt-Based Catalysts for Propane Dehydrogenation Reaction

et al. 2021

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Propylene is one of the most important feedstocks in the chemical industry, as it is used in the production of widely diffused materials such as polypropylene. Conventionally, propylene is obtained by cracking petroleum-derived naphtha and is a by-product of ethylene production. To ensure adequate propylene production, an alternative is needed, and propane dehydrogenation is considered the most interesting process. In literature, the catalysts that have shown the best performance in the dehydrogenation reaction are Cr-based and Pt-based. Chromium has the non-negligible disadvantage of toxicity; on the other hand, platinum shows several advantages, such as a higher reaction rate and stability. This review article summarizes the latest published results on the use of platinum-based catalysts for the propane dehydrogenation reaction. The manuscript is based on relevant articles from the past three years and mainly focuses on how both promoters and supports may affect the catalytic activity. The published results clearly show the crucial importance of the choice of the support, as not only the use of promoters but also the use of supports with tuned acid/base properties and particular shape can suppress the formation of coke and prevent the deep dehydrogenation of propylene.

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Propane Dehydrogenation on Single-Site [PtZn4] Intermetallic Catalysts

Cited by 175 publications

References 37 publications

In situ encapsulated subnanometric CoO clusters within silicalite‐1 zeolite for efficient propane dehydrogenation

In situ encapsulated subnanometric CoO clusters within silicalite‐1 zeolite for efficient propane dehydrogenation

Research progress of CO2 oxidative dehydrogenation of propane to propylene over Cr-free metal catalysts

Propylene Synthesis: Recent Advances in the Use of Pt-Based Catalysts for Propane Dehydrogenation Reaction

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