The models of solid oxide fuel cells (SOFCs), which are available in the open literature, may be categorized into two non-overlapping groups: microscale or macroscale. Recent progress computational power makes it possible to formulate a model combines both approaches, so-called multiscale model. novelty this modeling approach lies combination description transport phenomena and electrochemical reactions’ with fluid dynamics heat mass transfer an SOFC. In work, mathematical cell takes account...

Solid oxide fuel cell (SOFC) has a high energy conversion efficiency and emits low level of pollutants in the environment. One crucial elements is an anode that, typically, composite nickel yttria-stabilized zirconia (Ni-YSZ). The microstructure morphology plays important role determining electrochemical performances single and, consequently, stack cells. Therefore, optimization design should be included development system at very early stage. material can tailored to fulfill it particular...

Plug-flow reactors are very common in methane/steam reforming applications. Their operation presents many challenges, such as a strong dependence on temperature and inlet composition distribution. The endothermic steam reaction might result drop at the of reactor. non-uniform distribution due to an chemical can have tremendous consequences reactor, catalyst degradation, undesired side reactions thermal stresses. One possibilities avoid unfavorable conditions control circumstances inside...

In this research, we investigate the connection between an observed enhancement in solid oxide fuel cell stack performance and evolution of microstructure its electrodes. A three dimensional, numerical model is applied to predict porous ceramic-metal electrode on basis morphology. The features a non-continuous computational domain based digital reconstruction obtained using focused ion beam scanning electron microscopy (FIB-SEM) nanotomography. Butler–Volmer equation used compute charge...

Solid oxide fuel cell (SOFC) systems can be fueled by natural gas when the reforming reaction is conducted in a stack. Due to its maturity and safety, indirect internal usually used. A strong endothermic methane/steam process needs large amount of heat, it convenient provide thermal energy burning remainders from cell. In this work, mathematical model afterburner-powered reformer proposed. To analyze effect composition on SOFC performance, zero-dimensional connected with formulated. It shown...

Plug flow reactors are very common in the chemical process industry, including methane/steam reforming applications. Their operation presents many challenges, such as a strong dependence of temperature and composition distribution on inlet conditions. The strongly endothermic reaction might result drop at reactor consequently occurrence large gradients. non-uniform due to can have tremendous consequences reactor, catalyst degradation, undesired side reactions thermal stresses. To avoid...

One of the most promising between many high temperature nuclear reactors applications is to produce hydrogen with heat gained. The simplest and best examined method steam reforming methane. fabricated has wide range use, for example can be electrochemically oxidized in fuel cells. However, management inside methane/steam reformer extremely important because huge gradients cause catalyst deactivation. In this work analysis field helium-heated presented. optimal system working conditions...

This paper primarily focuses on the formulation and validation of mathematical numerical models for a new electrolyte-supported solid oxide fuel cell stack. By leveraging modeling, main goal is to deepen understanding operational aspects transport phenomena within this system. The developed are implemented in ANSYS, Inc., Fluent software, which enables range simulations. To validate models, stack fabrication methodology, prototype construction, conducted electrochemical tests were proposed....

From the chemical point of view reforming process heavy hydrocarbons such as Associated Petroleum Gas (APG) is very complex. One main issue a set undesired reactions that causes deposition solid carbon and consequently block catalytic property reactor. The experimental investigation crucial to design APG reactors. However, experiment needs be preceded by careful thermodynamical analysis safe operation conditions. In case small number reactants in steam pure methane, problem can solved...

Biogas, landfill gas, associated petroleum and other tail gases accompanying various industrial processes are potential sources of hydrogen carbon monoxide for solid oxide fuel cells via the reforming process. As these contain heavy hydrocarbons, fine-tuning steam dioxide addition specific temperature control necessary to avoid deposition during Numerical simulation plays a crucial role in designing miniaturized reactors optimal working conditions. All simulations must account deposition....

With the cost of green hydrogen production decreasing year by year, methanation, a carbon dioxide hydrogenation reaction, is becoming more critical technology for realization carbon-neutral society. Here, we show procedure membrane preparation distributor-type reactor that simultaneously captures and recycles CO2 together with experimental tests proposed design. To decrease temperature gradient in to improve methane recovery from inlet gas mixture, three-dimensional computational fluid...

Abstract The current energy transition focuses on decentralizing systems by implementing alternative sources. Integrating distributed sources into functional hybrid has proven to be a difficult task. To solve this problem, it is important conduct an in-depth analysis of the system through preparation mathematical model. study aims model and simulate operation off-grid self-sustainable storage for single-family household use utilizing solid oxide technology. proposed consists photovoltaic...

Abstract Utilization of machine learning methodologies, particularly artificial neural networks (ANNs), presents a good approach to accurately model physical systems. Such predictive simulations offer the ability predict system performance across diverse operational conditions without need use mathematical descriptions. This contrast with traditional, time-consuming and unstable approaches reliant on partial differential equations. In this study, ANN methodology is used obtain...

Solid oxide fuel cells are recognized as a promising energy conversion technology. Crucial to the field is opportunity reduce costs of prototyping methodology. Due difficulty conducting direct measurements inside electrodes and cell’s channels, numerical modeling remains primary tool for improving understanding analyzing cell operation. Here, computational fluid dynamic simulation banded solid stack, applied enhance geometrical design, shown. A mathematical model, which includes momentum,...

Jedną z zalet wysokotemperaturowych ogniw paliwowych ze stałym elektrolitem tlenkowym SOFC jest elastyczność w doborze paliw, szczególności możliwość wykorzystania węglowodorów.Dla paliowych zasilanych węglowodorami możliwa konwersja paliwa na drodze reformingu zewnętrznego bądź wewnętrznego.W przypadku systemu połączeniem wewnętrznym ciepło pochodzące pracującego stosu może zostać efektywnie wykorzystane endotermicznej reakcji

Solid oxide fuel cells (SOFCs) are being recognized as one of the promising energy conversion technologies.To study SOFCs systems operation, numerical modeling is a helpful tool, which allows to understand and improve their operation.Moreover, crucial feature opportunity reduce economical time cost in prototyping methodology.In this work, banded SOFC stack, includes six 12 mm x cells, connected series, applied on single electrolyte support, studied numerically, using finite-volume method.A...

In this work, the results from numerical simulation of a single planar solid oxide fuel cell (SOFC) are presented. The mathematical model SOFC unit is formulated using set partial differential equations and electrochemical kinetics modeled with Butler-Volmer equations. governing take into account microstructure electrodes derived focused ion beam scanning electron microscope (FIB-SEM), state-of-the-art technique in science. show impact working conditions on cell's current-voltage...