Regeneration of LOHC dehydrogenation catalysts: In-situ IR spectroscopy on single crystals, model catalysts, and real catalysts from UHV to near ambient pressure

Regeneration of LOHC dehydrogenation catalysts: In-situ IR spectroscopy on single crystals, model... Article history: The Liquid Organic Hydrogen Carrier (LOHC) concept offers an efficient route to store hydrogen using Received 2 July 2015 organic compounds that are reversibly hydrogenated and dehydrogenated. One important challenge Received in revised form 31 October 2015 towards application of the LOHC technology at a larger scale is to minimize degradation of Pt-based dehy- Accepted 5 November 2015 drogenation catalysts during long-term operation. Herein, we investigate the regeneration of Pt/alumina Available online 10 November 2015 catalysts poisoned by LOHC degradation. We combine ultrahigh vacuum (UHV) studies on Pt(111), inves- tigations on well-defined Pt/Al O model catalysts, and near-ambient pressure (NAP) measurements on 2 3 Keywords: real core–shell Pt/Al O catalyst pellets. The catalysts were purposely poisoned by reaction with the 2 3 Infrared spectroscopy LOHC perhydro-dibenzyltoluene (H18-MSH) and with dicyclohexylmethane (DCHM) as a simpler model Liquid Organic Hydrogen Carrier compound. We focus on oxidative regeneration under conditions that may be applied in real dehydro- Model catalysis genation reactors. The degree of poisoning and regeneration under oxidative reaction conditions was Real catalysis quantified using CO as a probe molecule and measured by infrared reflection-absorption spectroscopy Pressure gap Materials gap (IRAS) and diffuse reflectance Fourier transform IR spectroscopy (DRIFTS) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Regeneration of LOHC dehydrogenation catalysts: In-situ IR spectroscopy on single crystals, model catalysts, and real catalysts from UHV to near ambient pressure

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier B.V.
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2015.11.045
Publisher site
See Article on Publisher Site

Abstract

Article history: The Liquid Organic Hydrogen Carrier (LOHC) concept offers an efficient route to store hydrogen using Received 2 July 2015 organic compounds that are reversibly hydrogenated and dehydrogenated. One important challenge Received in revised form 31 October 2015 towards application of the LOHC technology at a larger scale is to minimize degradation of Pt-based dehy- Accepted 5 November 2015 drogenation catalysts during long-term operation. Herein, we investigate the regeneration of Pt/alumina Available online 10 November 2015 catalysts poisoned by LOHC degradation. We combine ultrahigh vacuum (UHV) studies on Pt(111), inves- tigations on well-defined Pt/Al O model catalysts, and near-ambient pressure (NAP) measurements on 2 3 Keywords: real core–shell Pt/Al O catalyst pellets. The catalysts were purposely poisoned by reaction with the 2 3 Infrared spectroscopy LOHC perhydro-dibenzyltoluene (H18-MSH) and with dicyclohexylmethane (DCHM) as a simpler model Liquid Organic Hydrogen Carrier compound. We focus on oxidative regeneration under conditions that may be applied in real dehydro- Model catalysis genation reactors. The degree of poisoning and regeneration under oxidative reaction conditions was Real catalysis quantified using CO as a probe molecule and measured by infrared reflection-absorption spectroscopy Pressure gap Materials gap (IRAS) and diffuse reflectance Fourier transform IR spectroscopy (DRIFTS)

Journal

Applied Surface ScienceElsevier

Published: Jan 1, 2016

References

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  • Dehydrogenation of dodecahydro-N-ethylcarbazole on Pd/Al2O3 model catalysts
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  • Dynamics of reactions at surfaces
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  • On the nature of dense CO adlayers
    Persson, B.N.J.; Tüshaus, M.; Bradshaw, A.M.
  • Temperature programed desorption of C2H4 from pure and graphite-covered Pt(111)
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