Achieving high ethylene yield in non-oxidative ethane dehydrogenation

Riley, Christopher; Riva, Andrew De La; Ibarra, Isabel L.; Datye, Abhaya K.; Chou, Stanley S.

doi:10.1016/j.apcata.2021.118309

Cited by 21 publications

(45 citation statements)

References 44 publications

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“…The advantages of ethane direct dehydrogenation are lower temperatures (∼750 °C), absence of CO 2 , and ethylene yields up to ∼95%. 89 At the same time, because of thermodynamic limitations, temperatures of ethane DDH has to be higher than those in propane DDH (Fig. 6).…”

Section: Light Olefin Synthesis From Hydrocarbonsmentioning

confidence: 98%

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Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

et al. 2022

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Section: Light Olefin Synthesis From Hydrocarbonsmentioning

confidence: 98%

“…6). 89,90 Fig. 6 Equilibrium constants of direct (red) and oxidative (green) alkane dehydrogenation processes.…”

Section: Direct Alkane Dehydrogenationmentioning

confidence: 99%

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

et al. 2022

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“…The PtMn catalyst was prepared according to the procedure used by Wu et al using sequential incipient wetness of pH-adjusted manganese(II) nitrate solution and tetraamine platinum nitrate solution. The catalyst has been characterized via X-ray diffraction (XRD), X-ray fluorescence (XRF), Brunauer–Emmett–Teller (BET) surface area analysis, and transmission electron microscopy (TEM) . XRD analysis determined the crystalline phases present within the Pt-based catalyst and was conducted with a Bruker D2 Phaser operating in Bragg–Brentano geometry.…”

Section: Methodsmentioning

confidence: 99%

“…A JEOL JEM 2010 F field emission microscope was used for TEM imaging. Surface characterization results can be found in the Supporting Information of ref . The catalyst powder was formed into 1 mm thick, 6.35 mm diameter pellets with a press (Retsch PP 25, 1000 MPa pellet pressure).…”

Section: Methodsmentioning

confidence: 99%

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Gas-Phase Hydrogen-Atom Measurement above Catalytic and Noncatalytic Materials during Ethane Dehydrogenation

et al. 2022

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The role of a solid surface for initiating gas-phase reactions is still not well understood. The hydrogen atom (H) is an important intermediate in gas-phase ethane dehydrogenation and is known to interact with surface sites on catalysts. However, direct measurements of H near catalytic surfaces have not yet been reported. Here, we present the first H measurements by laser-induced fluorescence in the gas-phase above catalytic and noncatalytic surfaces. Measurements at temperatures up to 700 °C show H concentrations to be at the highest above inert quartz surfaces compared to stainless steel and a platinum-based catalyst. Additionally, H concentrations above the catalyst decreased rapidly with time on stream. These newly obtained observations are consistent with the recently reported differences in bulk ethane dehydrogenation reactivity of these materials, suggesting H may be a good reporter for dehydrogenation activity.

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Direct Observation of the Ethyl Radical in the Pyrolysis of Ethane

Genossar‐Dan,

Atlas,

Fux

et al. 2023

Angewandte Chemie

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We report the first direct detection of ethyl radical in the pyrolysis of ethane. Observation of this vital intermediate was made possible in this extremely reactive environment by the use of a microreactor coupled with synchrotron radiation and photoelectron photoion coincidence (PEPICO) spectroscopy, despite its short lifetime and low concentration. Together with ab‐initio master equation‐calculated rates and fully coupled computational fluid dynamics simulations, our measurements show that even under the low pressures and short residence times in our experiment, ethyl formation can only be explained by bimolecular reactions; the most important is the catalytic attack of ethane by H atoms, which are then regenerated by decomposition of the nascent ethyl radicals. Our results complete the observation of all hypothesized intermediates in this industrially important process and highlight the need for further studies under additional conditions using similar methods to improve existing models and optimize process chemistries.

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Achieving high ethylene yield in non-oxidative ethane dehydrogenation

Cited by 21 publications

References 44 publications

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

Gas-Phase Hydrogen-Atom Measurement above Catalytic and Noncatalytic Materials during Ethane Dehydrogenation

Direct Observation of the Ethyl Radical in the Pyrolysis of Ethane

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