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Kolff, Fenna (author)The world is witnessing unprecedented climate changes, which have worsened over the past couple of years. Despite significant progress in renewable energy, achieving a reduction of global warming remains challenging. Renewable energy sources like solar, wind, and hydroelectric technologies offer promising solutions, but challenges persist due to...master thesis 2024
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Bleeker, J.J. (author), van Kasteren, Celine (author), van Ommen, J.R. (author), Vermaas, D.A. (author)To make green hydrogen more economically attractive, the energy losses in alkaline electrolysis need to be minimized while operating at high current densities (1 A cm<sup>−2</sup>). At these current densities the ohmic resistance and gas bubbles effects contribute largely to the energy losses. To mitigate the gas bubbles losses, we...journal article 2024
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Burdorf, Laurine D.W. (author), Cook, Perran L.M. (author), Robertson, Elizabeth K. (author), Tramper, Anton (author), Hidalgo-Martinez, Silvia (author), Vasquez-Cardenas, Diana (author), Malkin, Sairah Y. (author), Meysman, F.J.R. (author)Cable bacteria can reach high densities in coastal sediments, and as a result of their unusual electrogenic lifestyle and intense metabolic activity, exert a major and distinct impact on biogeochemical cycling, both locally in sediments and at the ecosystem level. This appears to be particularly true for seasonally hypoxic systems, but the...journal article 2024
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Deng, Shaoyu (author), Liu, J. (author), Yang, Xiaofan (author), Sun, Dezhi (author), Wang, Aijie (author), van Loosdrecht, Mark C.M. (author), Cheng, Xiang (author)The accumulation of phosphorus in activated sludge in wastewater treatment plants (WWTPs) provides potential for phosphorus recovery from sewage. This study delves into the potential for releasing phosphorus from waste activated sludge through two distinct treatment methods—thermal hydrolysis and pH adjustment. The investigation was conducted...journal article 2024
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Phadke, S.A. (author), de Jong, W. (author), Haverkort, J.W. (author)The anodic co-production of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) during alkaline water electrolysis has gained interest as a sustainable alternative for anthraquinone oxidation. However, electrochemical H<sub>2</sub>O<sub>2</sub> production is often studied with idealized laboratory setups to determine the H<sub>2</sub>O<sub>2</sub>...journal article 2024
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Wang, Jianyun (author), Zhang, Rui (author), Hou, Fuxing (author), Ye, G. (author)Microbial induced calcium carbonate precipitation (MICP) technology has been successfully used to enhance the properties of recycled concrete aggregates. However, the complex source and varied physical and chemical properties of recycled aggregates may have influence on the modification efficiency since microbes are often sensitive to the...journal article 2024
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Almeida Benalcazar, E.F. (author), Mondini, Camille (author), Bruant, Guillaume (author), Tremblay, Julien (author), Weissbrodt, D.G. (author), Mockaitis, Gustavo (author)BACKGROUND: Carboxylates such as volatile fatty acids (VFA) can be produced by acidogenic fermentation (AF) of dairy wastes including cheese whey, a massive residue produced at 160.67 million m<sup>3</sup> of which 42% are not valorized and impact the environment. In mixed-culture fermentations, selection pressures can favor AF and halt...journal article 2024
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Boukhalfa, Zakaria (author), Comeau, M.J. (author), Benhallou, Amel (author), Bouzid, Abderrezak (author), Bendaoud, Abderrahmane (author)Continental intraplate volcanic systems, with their location far from plate tectonic boundaries, are not well understood: the crustal and lithospheric mantle structure of these systems remain enigmatic and there is no consensus on the mechanisms that cause melt generation and ascent. The Cenozoic saw the development of numerous volcanic...abstract 2024
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Paudel, Anup (author), Paneru, Bishwash (author), Mainali, D.P. (author), Karki, Sameep (author), Pochareddy, Yashwanth (author), Shakya, Shree Raj (author), Karki, Seemant (author)With the increasing number of hydropower plants under construction and proposed in Nepal, the country is anticipated to experience a surplus of hydropower that exceeds its peak load demand. This surplus electricity becomes particularly high during the wet seasons, when hydropower production reaches its maximum capacity. This research focuses...review 2024
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Lock, Niels (author)To utilize electronic power converters for water electrolysis in industrial electrical networks, reliable testing methods are required to ensure safe control operation as malfunctions can instigate hydrogen explosion and fierce electrical hazards. In this thesis, Digital Twin modeling via OPAL-RT software and hardware is compared to Simulink and...master thesis 2023
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Haverlag, Hein (author)In this research project, multiphase behaviour in zero gap alkaline water electrolyzers is investigated, focusing on the influence of various parameters including current density, electrode-wall distance and electrode height. This involves a cell containing a vertical electrode pair separated by a membrane submerged in an electrolyte that has a...master thesis 2023
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de Haan, Stijn (author)In this thesis, both a 10 MW Alkaline Electrolyser (AE) and a 10 MW Proton-Exchange Membrane (PEM) electrolyser system are evaluated through a comprehensive techno-economic feasibility study, spanning a 25-year operational lifespan. The systems are designed to serve a dual function, producing green hydrogen at 350 bar for utilisation at a...master thesis 2023
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Murugesan, Vikki (author)Enhancing the efficiency of industrial water electrolysis for hydrogen production is vital for the energy transition. In Alkaline Water Electrolysis (AWE), hydrogen is produced at the cathode, and the bubbles are formed when the local hydrogen concentration exceeds the solubility limit. It is important to understand the exact local conditions...master thesis 2023
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Grevet, Camiel (author)The utilization of water electrolysis for hydrogen production is expected to increase significantly in the upcoming decades. Modular system design offers great advantages for emerging markets, whilst providing the necessary flexibility in capacity that intermittent renewable energy sources require. Literature research reveals little information...master thesis 2023
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Deiters, Gilles (author)In an effort to make water electrolysis more efficient and simple, flow-through electrolyzers eliminate the need for a gas-separating membrane between the electrodes. However, replacing the membrane with a forced flow field brings new challenges and considerations. In this research, the design of a flow-through electrolyzer is optimized for...master thesis 2023
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Manna, Kris (author)This master thesis introduces a recently surfaced method to produce hydrogen and oxygen using alkaline water electrolysis. A hydrophilic porous diaphragm is used that can feed electrolyte laterally to two porous electrodes that are placed against it. Consequently, hydrogen and oxygen are produced directly at the electrodes without any bubble...master thesis 2023
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PAUL, Ivana Mariam Paul (author)The development of an efficient and sustainable transportation system is crucial for the effective functioning of economies. Concrete, a widely used material for road construction, poses significant environmental challenges. A sustainable alternative is to use alkali-activated concrete (AAC) for road construction. However, the aggregates used in...master thesis 2023
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Pektaş, Mehmet (author)A water electrolyzer is an electrochemical device that produces hydrogen and oxygen from water via electricity. A sustainable way of producing hydrogen with renewable electricity, also known as green hydrogen, could enable its use in decarbonisation of sectors that depend on fossil fuels. However, to scale up the production of green hydrogen,...master thesis 2023
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Oikonomidis, Silvestros (author), Ramdin, M. (author), Moultos, O. (author), Bos, Albert (author), Vlugt, T.J.H. (author), Rahbari, A. (author)Due to the intermittency of renewable energy sources, alkaline water electrolyzers are typically operated at partial load compared to the nominal design value. It is well-known that gas crossover is dominant at low current densities leading to higher anodic hydrogen content and higher cathodic oxygen content in the separator tanks. High...journal article 2023
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van Haersma Buma, Bernhard N.D. (author), Peretto, Marco (author), Matar, Ziad M. (author), van de Kaa, G. (author)This paper focuses on the battle for a dominant design for renewable hydrogen electrolysis in which the designs, alkaline and proton exchange membrane, compete for dominance. First, a literature review is performed to determine the most relevant factors that influence technology dominance. Following that, a Best Worst Method analysis is...journal article 2023