@misc{dreistadt_material_und_2023, 
author={Dreistadt, D.M.},
title={Material- und Systementwicklung für die Integration von Metallhydrid basierten Wasserstoffspeichern in Gas-to-Power Systeme},
year={2023},
howpublished = {doctoral thesis: Helmut-Schmidt-Universität Hamburg},
abstract = {For the use of renewable energy sources in modern energy supply systems, hydrogen as an energy carrier is a potentially important energy storage medium. Metal hydrides, among others, are suitable for storing this hydrogen in turn. In the frame of this work, the focus is on the system integration of metal hydrides into hydrogen-based Gas-to-Power (GtoP)-Systems based on powdered titanium-iron-manganese (TiFeMn)-alloys. For this, a hydrogen-based GtoP-experimental setup with an integrated 1,6 𝑘𝑊 PEM fuel cell was developed, built and tested. To supply the fuel cell with hydrogen, storage tanks filled with TiFeMn-hydride powder are used. The performed experiments have shown that the power supply is possible even under strong fluctuations in energy consumption and for a typical energy consumption of a household. In order to develop a suitable TiFeMn-alloy as a hydrogen storage mate-rial for this experimental setup, the effect of the percentages of the alloy components on the thermo-dynamic properties and hydrogen storage properties is studied. It is demonstrated that important properties such as the hydrogen storage capacity and the equilibrium pressure of the hydride can be influenced by the choice of these percentages, which means that TiFeMn-alloys could be adapted for the technical task. In order for the developed alloy to be able to store hydrogen, it must be activated. For this reason, a second focus of this work is the development and investigation of a suitable activa-tion method for TiFeMn-powder with low technical effort. The developed method allowed the TiFeMn-powder of the GtoP setup to be activated at low temperatures directly in the storage tanks. In addition, the influence of the activation on the hydride powder was investigated. The GtoP setup was also digi-tally implemented and simulated as a gas network by a simulation model. The obtained simulation results showed good agreement with the measured data. The developed simulation model can be used as an effective tool to design and optimize hydrogen-based GtoP systems with integrated metal hy-dride storage.},
note = {Dreistadt, D.: Material- und Systementwicklung für die Integration von Metallhydrid basierten Wasserstoffspeichern in Gas-to-Power Systeme. Helmut-Schmidt-Universität Hamburg, 2023.}}
@misc{covarrubiasguarneros_modeling_and_2022, 
author={Covarrubias Guarneros, M., Dreistadt, D., Bellosta von Colbe, J., Capurso, G., Siegers, M., Jepsen, J., Puszkiel, J., Klassen, T.},
title={Modeling and parameterization of a pem fuel cell stack for a system integration into a metal hydride based hydrogen storage system},
year={2022},
howpublished = {conference paper: ;},
abstract = {storage systems.},
note = {Covarrubias Guarneros, M.; Dreistadt, D.; Bellosta von Colbe, J.; Capurso, G.; Siegers, M.; Jepsen, J.; Puszkiel, J.; Klassen, T.: Modeling and parameterization of a pem fuel cell stack for a system integration into a metal hydride based hydrogen storage system. In: Dincer, I.; Colphan, C.; Ezan, M. (Ed.): 23rd World Hydrogen Energy Conference 2022 (WHEC 2022). Red Hook, NY: Curran Associates, Inc.. 2022. 468-470.}}
@misc{dreistadt_novel_emergency_2022, 
author={Dreistadt, D., Puszkiel, J., Bellosta von Colbe, J., Capurso, G., Steinebach, G., Meilinger, S., Le, T., Covarrubias Guarneros, M., Klassen, T., Jepsen, J.},
title={Novel emergency gas-to-power mh-storage and fuel cell system: Modeling and experimental validation},
year={2022},
howpublished = {conference paper: ;},
abstract = {experimental results},
note = {Dreistadt, D.; Puszkiel, J.; Bellosta von Colbe, J.; Capurso, G.; Steinebach, G.; Meilinger, S.; Le, T.; Covarrubias Guarneros, M.; Klassen, T.; Jepsen, J.: Novel emergency gas-to-power mh-storage and fuel cell system: Modeling and experimental validation. In: Dincer, I.; Colphan, C.; Ezan, M. (Ed.): 23rd World Hydrogen Energy Conference 2022 (WHEC 2022). Red Hook, NY: Curran Associates, Inc.. 2022. 1121-1123.}}
@misc{dreistadt_an_effective_2022, 
author={Dreistadt, D., Le, T., Capurso, G., Bellosta von Colbe, J., Santhosh, A., Pistidda, C., Scharnagl, N., Ovri, H., Milanese, C., Jerabek, P., Klassen, T., Jepsen, J.},
title={An effective activation method for industrially produced TiFeMn powder for hydrogen storage},
year={2022},
howpublished = {journal article},
doi = {https://doi.org/10.1016/j.jallcom.2022.165847},
abstract = {This work proposes an effective thermal activation method with low technical effort for industrially produced titanium-iron-manganese powders (TiFeMn) for hydrogen storage. In this context, the influence of temperature and particle size of TiFeMn on the activation process is systematically studied. The results obtained from this investigation suggest that the activation of the TiFeMn material at temperatures as low as 50 °C is already possible, with a combination of “Dynamic” and “Static” routines, and that an increase to 90 °C strongly reduces the incubation time for activation, i.e. the incubation time of the sample with the two routines at 90 °C is about 0.84 h, while ∼ 277 h is required for the sample treated at 50 °C in both “Dynamic” and “Static” sequences. Selecting TiFeMn particles of larger size also leads to significant improvements in the activation performance of the investigated material. The proposed activation routine makes it possible to overcome the oxide layer existing on the compound surface, which acts as a diffusion barrier for the hydrogen atoms. This activation method induces further cracks and defects in the powder granules, generating new surfaces for hydrogen absorption with greater frequency, and thus leading to faster sorption kinetics in the subsequent absorption-desorption cycles.},
note = {Online available at: \url{https://doi.org/10.1016/j.jallcom.2022.165847} (DOI). Dreistadt, D.; Le, T.; Capurso, G.; Bellosta von Colbe, J.; Santhosh, A.; Pistidda, C.; Scharnagl, N.; Ovri, H.; Milanese, C.; Jerabek, P.; Klassen, T.; Jepsen, J.: An effective activation method for industrially produced TiFeMn powder for hydrogen storage. Journal of Alloys and Compounds. 2022. vol. 919, 165847. DOI: 10.1016/j.jallcom.2022.165847}}
@misc{covarrubiasguarneros_modeling_and_2022, 
author={Covarrubias Guarneros, M., Dreistadt, D., Bellosta von Colbe, J., Capurso, G., Siegers, M., Jepsen, J., Puszkiel, J., Klassen, T.},
title={Modeling and parameterization of a pem fuel cell stack for a system integration into a metal hydride based hydrogen storage system},
year={2022},
howpublished = {conference lecture: Istanbul (TUR);},
note = {Covarrubias Guarneros, M.; Dreistadt, D.; Bellosta von Colbe, J.; Capurso, G.; Siegers, M.; Jepsen, J.; Puszkiel, J.; Klassen, T.: Modeling and parameterization of a pem fuel cell stack for a system integration into a metal hydride based hydrogen storage system. 23rd World Hydrogen Energy Conference (WHEC 2022). Istanbul (TUR), 2022.}}
@misc{dreistadt_novel_emergency_2022, 
author={Dreistadt, D., Puszkiel, J., Bellosta von Colbe, J., Capurso, G., Steinebach, G., Meilinger, S., Le, T., Covarrubias Guarneros, M., Klassen, T., Jepsen, J.},
title={Novel Emergency Gas-to-power System Based on Efficient and Long-lasting Solid-state Hydride Storage System: Modeling and Experimental Validation},
year={2022},
howpublished = {conference lecture: Istanbul (TUR);},
note = {Dreistadt, D.; Puszkiel, J.; Bellosta von Colbe, J.; Capurso, G.; Steinebach, G.; Meilinger, S.; Le, T.; Covarrubias Guarneros, M.; Klassen, T.; Jepsen, J.: Novel Emergency Gas-to-power System Based on Efficient and Long-lasting Solid-state Hydride Storage System: Modeling and Experimental Validation. 23rd World Hydrogen Energy Conference (WHEC 2022). Istanbul (TUR), 2022.}}
@misc{dreistadt_a_novel_2022, 
author={Dreistadt, D.M., Puszkiel, J., von Colbe, J.M.B., Capurso, G., Steinebach, G., Meilinger, S., Le, T.-T., Guarneros, M.C., Klassen, T., Jepsen, J.},
title={A Novel Emergency Gas-to-Power System Based on an Efficient and Long-Lasting Solid-State Hydride Storage System: Modeling and Experimental Validation},
year={2022},
howpublished = {journal article},
doi = {https://doi.org/10.3390/en15030844},
abstract = {In this paper, a gas-to-power (GtoP) system for power outages is digitally modeled and experimentally developed. The design includes a solid-state hydrogen storage system composed of TiFeMn as a hydride forming alloy (6.7 kg of alloy in five tanks) and an air-cooled fuel cell (maximum power: 1.6 kW). The hydrogen storage system is charged under room temperature and 40 bar of hydrogen pressure, reaching about 110 g of hydrogen capacity. In an emergency use case of the system, hydrogen is supplied to the fuel cell, and the waste heat coming from the exhaust air of the fuel cell is used for the endothermic dehydrogenation reaction of the metal hydride. This GtoP system demonstrates fast, stable, and reliable responses, providing from 149 W to 596 W under different constant as well as dynamic conditions. A comprehensive and novel simulation approach based on a network model is also applied. The developed model is validated under static and dynamic power load scenarios, demonstrating excellent agreement with the experimental results.},
note = {Online available at: \url{https://doi.org/10.3390/en15030844} (DOI). Dreistadt, D.; Puszkiel, J.; von Colbe, J.; Capurso, G.; Steinebach, G.; Meilinger, S.; Le, T.; Guarneros, M.; Klassen, T.; Jepsen, J.: A Novel Emergency Gas-to-Power System Based on an Efficient and Long-Lasting Solid-State Hydride Storage System: Modeling and Experimental Validation. Energies. 2022. vol. 15, no. 3, 844. DOI: 10.3390/en15030844}}
@misc{le_enhanced_hydrogen_2021, 
author={Le, T.-T., Pistidda, C., Puszkiel, J., Riglos, M.V.C., Dreistadt, D.M., Klassen, T., Dornheim, M.},
title={Enhanced Hydrogen Storage Properties of Li-RHC System with In-House Synthesized AlTi3 Nanoparticles},
year={2021},
howpublished = {journal article},
doi = {https://doi.org/10.3390/en14237853},
abstract = {In recent years, the use of selected additives for improving the kinetic behavior of the system 2LiH + MgB2 (Li-RHC) has been investigated. As a result, it has been reported that some additives (e.g., 3TiCl3·AlCl3), by reacting with the Li-RHC components, form nanostructured phases (e.g., AlTi3) possessing peculiar microstructural properties capable of enhancing the system’s kinetic behavior. The effect of in-house-produced AlTi3 nanoparticles on the hydrogenation/dehydrogenation kinetics of the 2LiH + MgB2 (Li-RHC) system is explored in this work, with the aim of reaching high hydrogen storage performance. Experimental results show that the AlTi3 nanoparticles significantly improve the reaction rate of the Li-RHC system, mainly for the dehydrogenation process. The observed improvement is most likely due to the similar structural properties between AlTi3 and MgB2 phases which provide an energetically favored path for the nucleation of MgB2. In comparison with the pristine material, the Li-RHC doped with AlTi3 nanoparticles has about a nine times faster dehydrogenation rate. The results obtained from the kinetic modeling indicate a change in the Li-RHC hydrogenation reaction mechanism in the presence of AlTi3 nanoparticles.},
note = {Online available at: \url{https://doi.org/10.3390/en14237853} (DOI). Le, T.; Pistidda, C.; Puszkiel, J.; Riglos, M.; Dreistadt, D.; Klassen, T.; Dornheim, M.: Enhanced Hydrogen Storage Properties of Li-RHC System with In-House Synthesized AlTi3 Nanoparticles. Energies. 2021. vol. 14, no. 23, 7853. DOI: 10.3390/en14237853}}
@misc{dematteis_fundamental_hydrogen_2021, 
author={Dematteis, E., Dreistadt, D., Capurso, G., Jepsen, J., Cuevas, F., Latroche, M.},
title={Fundamental hydrogen storage properties of TiFe-alloy with partial substitution of Fe by Ti and Mn},
year={2021},
howpublished = {journal article},
doi = {https://doi.org/10.1016/j.jallcom.2021.159925},
abstract = {TiFe intermetallic compound has been extensively studied, owing to its low cost, good volumetric hydrogen density, and easy tailoring of hydrogenation thermodynamics by elemental substitution. All these positive aspects make this material promising for large-scale applications of solid-state hydrogen storage. On the other hand, activation and kinetic issues should be amended and the role of elemental substitution should be further understood. This work investigates the thermodynamic changes induced by the variation of Ti content along the homogeneity range of the TiFe phase (Ti:Fe ratio from 1:1–1:0.9) and of the substitution of Mn for Fe between 0 and 5 at%. In all considered alloys, the major phase is TiFe-type together with minor amounts of TiFe2 or β-Ti-type and Ti4Fe2O-type at the Ti-poor and rich side of the TiFe phase domain, respectively. Thermodynamic data agree with the available literature but offer here a comprehensive picture of hydrogenation properties over an extended Ti and Mn compositional range. Moreover, it is demonstrated that Ti-rich alloys display enhanced storage capacities, as long as a limited amount of β-Ti is formed. Both Mn and Ti substitutions increase the cell parameter by possibly substituting Fe, lowering the plateau pressures and decreasing the hysteresis of the isotherms. A full picture of the dependence of hydrogen storage properties as a function of the composition will be discussed, together with some observed correlations.},
note = {Online available at: \url{https://doi.org/10.1016/j.jallcom.2021.159925} (DOI). Dematteis, E.; Dreistadt, D.; Capurso, G.; Jepsen, J.; Cuevas, F.; Latroche, M.: Fundamental hydrogen storage properties of TiFe-alloy with partial substitution of Fe by Ti and Mn. Journal of Alloys and Compounds. 2021. vol. 874, 159925. DOI: 10.1016/j.jallcom.2021.1599