Benzyltoluene/dibenzyltoluene-based mixtures as suitable liquid organic hydrogen carrier systems for low temperature applications
| Autor: | Andreas Bösmann, M. Eßl, Holger Jorschick, Peter Wasserscheid, M. Geißelbrecht, Patrick Preuster |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen Renewable Energy Sustainability and the Environment Vapor pressure Diffusion Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Hydrogen storage Viscosity Hydrogen carrier Fuel Technology Chemical engineering chemistry Dehydrogenation Reduced viscosity 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 45:14897-14906 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.03.210 |
| Popis: | In this contribution we propose mixtures of the two LOHC systems benzyltoluene (H0-BT)/perhydro benzyltoluene (H12-BT) and dibenzyltoluene (H0-DBT)/perhydro dibenzyltoluene (H18-DBT) as promising hydrogen storage media for technical applications at temperatures below ambient. The mixing of the two LOHC systems provides the advantage of a reduced viscosity of the hydrogen-rich system, for example a 20 wt% addition of H12-BT to H18-DBT reduces the viscosity at 10 °C by 80%. Interestingly, it is also found that the dehydrogenation of such mixture provides a hydrogen release productivity that is 12–16% higher compared to pure H18-DBT dehydrogenation under otherwise identical conditions. This enhanced rate is attributed to a combination of reduced hydrogen partial pressure in the reactor (due to the higher H12-BT vapor pressure), preferred H12-BT dehydrogenation (due to faster H12-BT diffusion) and effective transfer hydrogenation between the two LOHC systems. |
| Databáze: | OpenAIRE |
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