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Pletzer, Johannes (author)At speeds roughly between five and ten thousand km/h, hypersonic aircraft offer the promise of an extremely fast means of transport. Growing concerns about climate warming, however, direct attention to sustainability. This thesis focuses on atmospheric composition and radiation changes by considering a range of individual hypersonic aircraft...doctoral thesis 2024
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Steenstra, E.S. (author), Klaver, M. (author), Berndt, J. (author), Flemetakis, S. (author), Rohrbach, A. (author), Klemme, S. (author)Phlogopite and K-richterite constitute important carrier phases for H and F in Earth's lithosphere and mantle. The relative importance depends on their stabilities at high pressure and temperature, which in turn depends on bulk composition. Most previous experimental studies focused on the thermal stability of phlogopite and K-richterite were...journal article 2024
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Ripepi, D. (author)In the last century, the indiscriminate use of fossil energy to power the industrial revolution and technological progress of humankind, has led to the depletion of limited natural resources and, most importantly, the emission and accumulation of alarming levels of pollutants and greenhouse gases (GHG) in the atmosphere. One of the major...doctoral thesis 2023
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Moultos, O. (author), Tsimpanogiannis, Ioannis N. (author)Available data from experiments and molecular simulations for the intra-diffusivities of H (Formula presented.) and O (Formula presented.) in H (Formula presented.) O, and for the self-diffusivity of pure H (Formula presented.) O (at pressure and temperature conditions in which the solvent is in the vapour phase) are compared against...journal article 2023
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Scalability analysis of radical technologies to various aircraft class: Part 2: Sensitivity AnalysisBonnin, V.O. (author), Hoogreef, M.F.M. (author)This study aims at providing a landscape of opportunities and limitations for hybrid-electric aircraft (HEA) and hydrogen-powered aircraft by investigating several technological combinations applied to three aircraft classes: Regional (REG), Short-Medium Range (SMR) and Large Passenger Aircraft (LPA). The preliminary sizing of HEA using...conference paper 2022
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Kos, Johan (author), Posada Duque, J.A. (author), Peerlings, Bram (author), ben Salah, Nora (author), Lim, Nanette (author), Lammen, Wim (author), Stepchuk, I. (author), van der Sman, Elisabeth (author), Palmeros Parada, M.D.M. (author)This paper investigates green hydrogen and bio-based sustainable aviation fuels, including their production technology and feedstock, in combination with Clean Sky 2 propulsion technologies and novel hydrogen-powered propulsion technologies. The impact that these alternative aviation fuels and propulsion technologies can have on greenhouse...conference paper 2022
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Oudejans, Daphne (author), Offidani, M. (author), Constantinou, Achilleas (author), Albonetti, Stefania (author), Dimitratos, Nikolaos (author), Bansode, Atul (author)The interest in and need for carbon-free fuels that do not rely on fossil fuels are constantly growing from both environmental and energetic perspectives. Green hydrogen production is at the core of the transition away from conventional fuels. Along with popularly investigated pathways for hydrogen production, thermochemical water splitting...review 2022
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Farajzadeh, R. (author), Lomans, Bartholomeus Petrus (author), Hajibeygi, H. (author), Bruining, J. (author)This paper presents an assessment of the life-cycle exergetic efficiency and CO2 footprint of the underground biomethanation process. The subsurface formation, hosting microorganisms required for the reaction, is utilized to convert CO2 and green (produced from renewable energy) hydrogen to the so-called "green"or synthetic methane. The net...journal article 2022
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Oldenbroek, V.D.W.M. (author)This thesis presents the design and analysis of future 100% renewable integrated transport and energy systems based on electricity and hydrogen as energy carriers. In which Fuel Cell Electric Vehicles (FCEVs) are used for transport, distributing energy and balancing electricity demand. Passenger cars in Europe are parked on average 97% of the...doctoral thesis 2021
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Shikhar, Utkarsh (author), Hemmes, Kas (author), Woudstra, T. (author)Fuel cells are electrochemical devices that are conventionally used to convert the chemical energy of fuels into electricity while producing heat as a byproduct. High temperature fuel cells such as molten carbonate fuel cells and solid oxide fuel cells produce significant amounts of heat that can be used for internal reforming of fuels such...journal article 2021
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van der Roest, E. (author), Fens, T.W. (author), Bloemendal, Martin (author), Beernink, S.T.W. (author), van der Hoek, J.P. (author), van Wijk, A.J.M. (author)The fossil-based energy system is transitioning towards a renewable energy system. One important aspect is the spatial and temporal mismatch between intermitted supply and continuous demand. To ensure a reliable and affordable energy system, we propose an integrated system approach that integrates electricity production, mobility, heating of...journal article 2021
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Habibi, P. (author), Vlugt, T.J.H. (author), Dey, P. (author), Moultos, O. (author)Two-dimensional (2D) boron-based materials are receiving much attention as H2 storage media due to the low atomic mass of boron and the stability of decorating alkali metals on the surface, which enhance interactions with H2. This work investigates the suitability of Li, Na, and K decorations on 2D honeycomb borophene oxide (B2O) for H2...journal article 2021
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de Wagter, C. (author), Remes, B.D.W. (author), Ruisink, Rick (author), van Tienen, F. (author), van der Horst, E. (author)Flight endurance is still a bottleneck for many types of unmanned air vehicle (UAV) applications. While battery technology improves over the years, for flights that last an entire day, batteries are still insufficient. Hydrogen-powered fuel cells offer an interesting alternative but pose stringent requirements on the platform. The required...journal article 2020
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Huijts, N.M.A. (author), de Vries, G. (author), Molin, E.J.E. (author)Public acceptability of low-carbon energy projects is often measured with one-off polls. This implies that opinion-shifts over time are not always taken into consideration by decision makers relying on these polls. Observations have given the impression that public acceptability of energy projects increases after implementation. However, this...journal article 2019
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Bavykina, A.V. (author), Olivos Suarez, A.I. (author), Osadchii, D. (author), Valecha, R.R. (author), Franz, R.P.M. (author), Makkee, M. (author), Kapteijn, F. (author), Gascon, Jorge (author)A quasi chemical vapor deposition method for the manufacture of well-defined covalent triazine framework (CTF) coatings on cordierite monoliths is reported. The resulting supported porous organic polymer is an excellent support for the immobilization of two different homogeneous catalysts: (1) an Ir<sup>III</sup>Cp∗-based catalyst for the...journal article 2017
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Oldenbroek, V.D.W.M. (author), Wijtzes, Siebren (author), van Wijk, A.J.M. (author), Blok, K. (author)In a 2050 fully renewable national electricity, heating and road transport system primary energy supply comes from non-dispatchable power generation such as solar and wind energy. Both negative and positive dispatchable balancing power plants need to balance the system. This work investigates whether parked and grid connected (Vehicle-to-Grid...conference paper 2017
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Anastasopol, A. (author)Reliable and affordable energy storage represents a bottleneck in a scenario where renewable energy sources become prominent on the energy market. With its high potential energy density and the natural abundance of the element, hydrogen gas is an attractive energy storage medium. But its gaseous nature, its high explosive potential and...doctoral thesis 2014
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Huijts, N.M.A. (author)Sustainable energy systems are designed to overcome the large problems resulting from current fossil fuel use, such as climate change, air pollution and energy insecurity. Citizens’ opinions and responses are crucial to the successful implementation of new technologies. This thesis explains public acceptance from a psychological perspective. A...doctoral thesis 2013
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Durka, T. (author)Due to the quest for more efficient production processes both from the energy and selectivity point of view, microwave irradiation has attracted significant scientific attention over the last three decades, as an alternative means of chemical activation. Over this period, striking process benefits, such as higher conversions and selectivities...doctoral thesis 2013
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Tan, H. (author), Sivec, L. (author), Yan, B. (author), Santbergen, R. (author), Zeman, M. (author), Smets, A.H.M. (author)We show experimentally that the photocurrent of thin-film hydrogenated microcrystalline silicon (?c-Si:H) solar cells can be enhanced by 4.5?mA/cm2 with a plasmonic back reflector (BR). The light trapping performance is improved using plasmonic BR with broader angular scattering and lower parasitic absorption loss through tuning the size of...journal article 2013