... variables. The mass flow of oxygen, hydrogen flow, water flow, and temperature were taken to be the critical dynamics in the system. The unknown parameters were estimated using the experimental data of a 1.2 kW PEMFC. The simplified model showed good agreement with experimental results. Control schemes were...

... the ohmic conductivity of the solid electrolyte material [ 4 ]. While the high operating temperature of SOECs results in higher electricity-to-hydrogen conversion efficiency compared to low-temperature electrolyzers, such as AEL and PEMEC, it causes challenges for thermal management, cell stability...

... 08 06 2020 fuel cell thermal management steam reforming hydrogen heavy hydrocarbon Among various kinds of co-generation systems, the fuel-cell system is expected to achieve higher energy-conversion efficiency. Besides, the fuel-cell system can be preferable from environmental...

...Juhyun Kang; Joonguen Park; Joongmyeon Bae Hydrogen is a resource that provides energy and forms water only after reacting with oxygen. Among the many hydrogen generation systems, solid oxide electrolysis cells (SOECs) have attracted considerable attention as advanced water electrolysis systems...

... cell methanol hybrid utilization hydrogen efficiency The combination of different power sources like an engine, a battery or a fuel cell (FC) to meet a single propulsion demand constitutes a hybrid system. The hybrid electric vehicle (HEV) is such a hybrid configuration. Apart from...

...M. S. Sohal; J. E. O’Brien; C. M. Stoots; V. I. Sharma; B. Yildiz; A. Virkar Idaho National Laboratory (INL) is performing high-temperature electrolysis research to generate hydrogen using solid oxide electrolysis cells (SOECs). The project goals are to address the technical and degradation issues...

... cobalt compounds electrochemical electrodes electrochemical impedance spectroscopy electrolytes iron compounds nickel compounds solid oxide fuel cells titanium compounds yttrium compounds zirconium compounds hydrogen SOFC anode functional layer impedance spectroscopy Co3O4-NiO-YSZ...

...Joshua C. Walter; Brian J. Wolf; Shripad T. Revankar Hydrogen generation from catalyzed solutions of sodium borohydride has been demonstrated experimentally up to 10 MPa. Sodium borohydride solutions are nonflammable, stable in basic solution, and offer a volumetric hydrogen density of 63.2 gH 2...

...Naveed Akhtar; Stephen P. Decent; Daniel Loghin; Kevin Kendall A two dimensional, nonisothermal numerical model of a single-chamber solid oxide fuel cell has been developed. For the sake of simplicity in developing the model, hydrogen-air mixture (80% hydrogen, 20% air by volume, which...

...Srisha Rao M V; G. Jagadeesh Fuel cells are emerging as alternate green power producers for both large power production and for use in automobiles. Hydrogen is seen as the best option as a fuel; however, hydrogen fuel cells require recirculation of unspent hydrogen. A supersonic ejector is an apt...

...N. B. Raberger; M. J. Stutz; N. Hotz; D. Poulikakos This work investigates numerically a catalytic postcombustor for a micro-solid oxide fuel cell (SOFC) system. The postcombustor oxidizes toxic and explosive carbon monoxide (CO) and hydrogen exiting a solid oxide fuel cell to carbon dioxide...

... design, liquid water is stored internally to the fuel cell within graphite bipolar plates while hydrogen and oxygen gases, electrolyzed from water, are stored in containers external to the fuel cell. A spraying technique is used to produce a functional membrane electrode assembly. Catalyst ink...

... hydrogen clean energy Polymer electrolyte fuel cells (PEFCs) still require technological development to be a viable solution in terms of durability and costs issues. Going into further details, performance and durability primarily depend on the properties of electrochemical components...

..., a key to sustainable mobility, both nationally and globally. The history of alternative fuels has not been very successful. Various economic, social, and technological barriers have impeded the acceptance of energy carriers such as hydrogen as a major transportation fuel. An effective interaction...

...) within gas turbine systems powered by natural gas (methane) requires an intermediate step of methane conversion to a mixture of hydrogen and carbon monoxide. State-of-the-art Ni-YSZ (yttria-stabilized zirconia) anodes permit methane conversion directly on anode surfaces, and contemporary designs of SOFC...

... Structure ,” J. Power Sources 0378-7753 10.1016/j.jpowsour.2003.09.035 , 127 , pp. 172 – 180 . Hohlein , B. , Bee , M. , Bogild-Hansen , J. , Brockerhoff , P. , Colsman , G. , Emonts , B. , Menzer , R. , and Riedel , E. , 1996 , “ Hydrogen From Methanol for Fuel...

...B. A. Haberman; J. B. Young A typical integrated-planar solid oxide fuel cell (IP-SOFC) consists of modules with series connected electrochemical cells printed on their outer surfaces. Oxygen is supplied to the cathodes from air flowing over the outside of the module and hydrogen diffuses from...

..., both related to the local current value (Fig. 8d ); more specifically, hydrogen mass fraction initially decreases due to the occurrence of reaction and water diffusion through the membrane. When water drag effect becomes predominant due to the lack of water at the anode (Fig. 8c ), hydrogen mass...

...F. Cipitì; V. Recupero; L. Pino; A. Vita; M. Laganà This paper presents a two-dimensional model to describe the gas flow in an integrated reactor, developed at the CNR-ITAE Institute, and aimed to design a β eta 5 kWe hydrogen generator, named HYGen II, to integrate with polymer electrolyte fuel...

...Matti Noponen; Matias Halinen; Jari Kiviaho; Jaakko Saarinen Three different planar anode supported solid oxide fuel cells (SOFC) were tested with hydrogen, with autothermally prereformed natural gas from which sulfur was removed, and with autothermally prereformed natural gas that contained sulfur...