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)
Applied Surface Science – Elsevier
Published: Jan 1, 2016
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