Coupling of a Liquid Organic Hydrogen Carrier System with Industrial Heat

Abstract Energy storage is needed for adjusting fluctuating renewable energies to the actual energy demand. A liquid organic hydrogen carrier (LOHC) system is examined for its suitability as a storage system for industrial applications. Integration of the LOHC system, e.g., into a cement plant allows for optimized utilization of waste heat. The exhaust heat from [...]

2018-07-26T12:46:03+00:00 June 29, 2016|

Measurement of Hydrogen Solubility in Potential Liquid Organic Hydrogen Carriers

Abstract Liquid organic hydrogen carriers (LOHC) are potential compounds that can facilitate chemical energy storage and hydrogen logistics using reversible hydrogenation. For the process development, the physical solubility of hydrogen in potential LOHCs is required. In this work, solubility of hydrogen in the potential LOHC systems toluene/methylcyclohexane, N-ethylcarbazole/perhydro-N-ethylcarbazole, and dibenzyltoluene/perhydrodibenzyltoluene was measured using the static [...]

2019-06-27T07:53:34+00:00 December 14, 2015|

Thermodynamic analysis of reversible hydrogenation for heat storage in concentrated solar power plants

Abstract Heat storage in concentrated solar power plants is required to compensate for variable availability of solar radiation. The energy density achievable with thermochemical heat storage is higher than for molten salt which represents the state of the art technology. The efficiency of different reversible hydrogenation reactions as thermochemical heat storage systems have been examined, [...]

2019-06-27T07:53:36+00:00 November 30, 2015|

Chemical utilization of hydrogen from fluctuating energy sources e Catalytic transfer hydrogenation from charged Liquid Organic Hydrogen Carrier systems

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 [...]

2019-06-27T07:53:41+00:00 November 7, 2015|

Liquid Organic Hydrogen Carriers: Thermophysical and Thermochemical Studies of Benzyl- and Dibenzyl-toluene Derivatives

Abstract The heat transfer oils dibenzyltoluene and benzyltoluene are promising materials as a new class of liquid organic hydrogen carrier compounds (LOHC). Thermophysical properties (heat capacity, density, viscosity, and surface tension) of the commercially available thermofluids Marlothem LH (benzyltoluene) and Marlotherm SH (dibenzyltoluene) and their completely hydrogenated derivatives were measured. Thermochemical properties (enthalpies of combustion [...]

2019-06-27T07:51:58+00:00 July 29, 2015|

Reversible vs. Irreversible Conversion of Hydrogen: How to Store Energy Efficiently?

Abstract Chemical conversion is a key technology for hydrogen storage. Two basic options exist in this field: reversible storage using organic carrier materials (energy carrying compounds) and irreversible conversion into hydrocarbon fuels (gas-to-fuel). It has been shown that reversible storage exhibits significantly higher overall storage efficiency for the electricity-to-electricity storage process. The high storage density [...]

2019-06-27T07:51:38+00:00 January 6, 2013|

Energy storage in residential and commercial buildings via Liquid Organic Hydrogen Carriers (LOHC)

Abstract This contribution proposes the usage of Liquid Organic Hydrogen Carriers (LOHC) for the establishment of a decentralised energy storage network. Due to the continually increasing amount of renewable energy within the power grid, in particular in countries of the European Union, a huge demand for storage capacities develops that can hardly be met by [...]

2019-06-27T07:50:58+00:00 August 8, 2012|

Energy Storage by CO2 Methanization and Energy Carrying Compounds: A Thermodynamic Comparison

Abstract Reconstructing current energy infrastructures dominated by fossil fuels towards a high share of renewable energy requires a drastic extension of energy storage capacities. Common storage technologies like compressed air or pumped hydro are either limited in capacity or have to face low efficiencies. A promising alternative is proposed with the use of energy carrying [...]

2019-06-27T07:51:00+00:00 October 11, 2011|