Platinum‐Promoted Ga/Al<sub>2</sub>O<sub>3</sub> as Highly Active, Selective, and Stable Catalyst for the Dehydrogenation of Propane

Sättler, Jesper J. H. B.; Gonzalez-Jimenez, Ines D.; Luo, Lin; Stears, Brien A.; Malek, Andrzej; Barton, David G.; Kilos, Beata A.; Kaminsky, Mark; Verhoeven, Tiny; Koers, Eline J.; Baldus, Marc; Weckhuysen, Bert M.

doi:10.1002/ange.201404460

Cited by 56 publications

(21 citation statements)

References 37 publications

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“…Lewis acids, such as Zn 2+ or Ga 3+ , are catalytically active for propane dehydrogenation. Based on the hypothesis that T d Co 2+ catalyzed propane dehydrogenation through a non‐redox process by acting as a Lewis acid, IR spectroscopy with pyridine as a probe was utilized to probe the acidity of the Co‐Al catalyst.…”

Section: Resultsmentioning

confidence: 99%

A Mesoporous Cobalt Aluminate Spinel Catalyst for Nonoxidative Propane Dehydrogenation

Kim

Sulmonetti

et al. 2017

ChemCatChem

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A mesoporous CoAl2O4 spinel (Co‐Al) is synthesized by a one‐step evaporation‐induced self‐assembly (EISA) method. N2 physisorption and TEM are used to demonstrate the presence of mesopores within the Co‐Al material. The spinel crystal structure of Co‐Al, in which Co occupies tetrahedral (Td) sites, is confirmed by using XRD and UV/Vis spectroscopy. In nonoxidative propane dehydrogenation at 550 °C, a propane conversion of approximately 8 % is observed for Co‐Al with a >80 % propylene selectivity, which corresponds to a turnover frequency of 5.1 h−1 based on an estimation of the number of active Co sites by using NH3 temperature‐programmed desorption. A much higher propane conversion rate and a circa 80 % propylene selectivity is observed upon reaction at 600 °C. Continuous deactivation of the catalyst is observed for Co‐Al at this elevated temperature. In situ X‐ray absorption spectroscopy results suggest that Co remains as a Td Co2+ species under the reaction conditions. The Td Co2+ sites within the Co‐Al material are thus proposed to act as Lewis acidic active sites; this acidity is verified using IR spectroscopy with pyridine as a probe molecule.

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Section: Resultsmentioning

confidence: 99%

A Mesoporous Cobalt Aluminate Spinel Catalyst for Nonoxidative Propane Dehydrogenation

Kim

Sulmonetti

et al. 2017

ChemCatChem

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“…VO x , GaO x InO x , or SnO x . [5][6][7][8][9][10][11][12][13][14] Among such alternatives, ZnO-based catalysts should especially be mentioned owing to the low-cost and environmentally friendly nature of this metal oxide. Both isolated ZnO x species and 6 ZnO x clusters supported on SiO 2 or zeolite were reported to be active for propane dehydrogenation (PDH).…”

Section: Introductionmentioning

confidence: 99%

Elucidating the Nature of Active Sites and Fundamentals for their Creation in Zn-Containing ZrO₂–Based Catalysts for Nonoxidative Propane Dehydrogenation

et al. 2020

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Environmentally friendly and low-cost catalysts are required for large-scale non-oxidative dehydrogenation of propane to propene (PDH) to replace currently used CrO x -or Pt-based catalysts. This work introduces ZnO-containing ZrO 2 -or MZrO x -supported (M=Ce, La, Ti or Y) catalysts. The most active materials outperformed the state-of-the-art catalysts with supported CrO x , GaO x , ZnO x or VO x species as well as bulk ZrO 2 -based catalysts without ZnO. The spacetime yield of propene of 1.25 kg C3H6 •kg -1 cat •h -1 at a propane conversion of about 30% with propene selectivity of 95% was obtained over Zn(4 wt%)/TiZrO x at 550°C.For deriving key insights into the structure of active sites, reactivity, selectivity and onstream stability, the catalysts were characterized by XRD, HRTEM, EDX mapping, XPS, X-ray absorption, CO-TPR, CO 2 -TPD, NH 3 -TPD, Pyridine-FTIR, operando UV-Vis spectroscopy, Raman spectroscopy, TPO and temporal analysis of products. In contrast with previous reports used bulk ZrO 2 -based catalysts without ZnO, coordinatively unsaturated Zr cations are not the main active sites in the ZnO-containing catalysts.Supported ZnO x species were concluded to participate in the PDH reaction. The current X-ray absorption analysis proved that their structure is affected by the type of metal oxide used as dopant for ZrO 2 and on crystallinity of ZrO 2 . Isolated tricoordinated Zn 2+ species

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“…93 The diversity of proposed active sites gives an idea of the complex quest of developing better PDH catalysts by rational design, which shall be based on insights from in situ and operando characterization and theoretical calculations. 94…”

Section: Dehydrogenation Catalysts Overviewmentioning

confidence: 99%

Propane to olefins tandem catalysis: a selective route towards light olefins production

et al. 2021

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Platinum‐Promoted Ga/Al₂O₃ as Highly Active, Selective, and Stable Catalyst for the Dehydrogenation of Propane

Cited by 56 publications

References 37 publications

A Mesoporous Cobalt Aluminate Spinel Catalyst for Nonoxidative Propane Dehydrogenation

A Mesoporous Cobalt Aluminate Spinel Catalyst for Nonoxidative Propane Dehydrogenation

Elucidating the Nature of Active Sites and Fundamentals for their Creation in Zn-Containing ZrO₂–Based Catalysts for Nonoxidative Propane Dehydrogenation

Propane to olefins tandem catalysis: a selective route towards light olefins production

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Platinum‐Promoted Ga/Al2O3 as Highly Active, Selective, and Stable Catalyst for the Dehydrogenation of Propane

Cited by 56 publications

References 37 publications

A Mesoporous Cobalt Aluminate Spinel Catalyst for Nonoxidative Propane Dehydrogenation

A Mesoporous Cobalt Aluminate Spinel Catalyst for Nonoxidative Propane Dehydrogenation

Elucidating the Nature of Active Sites and Fundamentals for their Creation in Zn-Containing ZrO2–Based Catalysts for Nonoxidative Propane Dehydrogenation

Propane to olefins tandem catalysis: a selective route towards light olefins production

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Platinum‐Promoted Ga/Al₂O₃ as Highly Active, Selective, and Stable Catalyst for the Dehydrogenation of Propane

Elucidating the Nature of Active Sites and Fundamentals for their Creation in Zn-Containing ZrO₂–Based Catalysts for Nonoxidative Propane Dehydrogenation