Chemical utilization of hydrogen from fluctuating energy sources – Catalytic transfer hydrogenation from charged Liquid Organic Hydrogen Carrier systems. (12th January 2016)

• Record Type: Journal Article
• Authors: Geburtig, Denise; Preuster, Patrick; Bösmann, Andreas; Müller, Karsten; Wasserscheid, Peter
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 2(2016)
• Page Start: 1010
• Page End: 1017
• Publication Date: 2016-01-12
• Subjects: Hydrogen storage -- Liquid Organic Hydrogen Carrier -- Dibenzyltoluene -- Hydrogenation -- Dehydrogenation -- Transfer hydrogenation; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.10.013
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Liquid Organic Hydrogen Carrier (LOHC) systems offer a very attractive way for storing and distributing hydrogen from electrolysis using excess energies from solar or wind power plants. In this contribution, an alternative, high-value utilization of such hydrogen is proposed namely its use in steady-state chemical hydrogenation processes. We here demonstrate that the hydrogen-rich form of the LOHC system dibenzyltoluene/perhydro-dibenzyltoluene can be directly applied as sole source of hydrogen in the hydrogenation of toluene, a model reaction for large-scale technical hydrogenations. Equilibrium experiments using perhydro-dibenzyltoluene and toluene in a ratio of 1:3 (thus in a stoichiometric ratio with respect to H2 ) yield conversions above 60%, corresponding to an equilibrium constant significantly higher than 1 under the applied conditions (270 °C). Highlights: Transfer hydrogenation using LOHC systems offers a highly attractive way to use hydrogen from intermittent electrolysis in steady-state chemical production processes. The LOHC compound perhydro-dibenzyltoluene can be applied as sole source of hydrogen in catalytic transfer hydrogenation reactions. Commercial Pt-based catalysts perform best in this reaction.