Search results for: Karol Cwieka

Items from 1 to 6 out of 6 results

article

Characterization of Spatial Distribution of Electrolyte in Molten Carbonate Fuel Cell Cathodes

Tomasz Wejrzanowski, Jürgen Gluch, Samih Haj Ibrahim, Karol Cwieka, more

Advanced Engineering Materials > 20 > 6 > n/a - n/a

High‐resolution computed X‐ray tomography (XCT) is applied in this study to characterize the microstructure of Molten Carbonate Fuel Cell (MCFC) cathodes after operation, where a “virgin cathode” formed by porous nickel has been in situ oxidized and infiltrated by liquid electrolyte. This technique extends state‐of‐the art methodology to characterize pores such as porosity analysis using Mercury...

article

Catalytic activity of NiO cathode in molten carbonate fuel cells

Kamil Czelej, Karol Cwieka, Juan C. Colmenares, Krzysztof J. Kurzydlowski

Applied Catalysis B: Environmental > 2018 > 222 > C > 73-75

Molten carbonate fuel cells (MCFCs) have attracted significant attention because of their potential contribution to the development of a sustainable and clean-energy society. MCFC performance is governed by cathodic transformation of carbon dioxide to carbonate anion in complex: gas – molten carbonate – solid surface system. Based on our recently proposed reaction mechanism together with the density...

article

Development of Molten Carbonate Fuel Cells at Warsaw University of Technology

Jarosław Milewski, Tomasz Wejrzanowski, Łukasz Szabłowski, Robert Baron, more

Energy Procedia > 2017 > 142 > C > 1496-1501

This paper describes the fuel cell research and development activities at Warsaw University of Technology by reviewing in particular the progress made in the development of Molten Carbonate Fuel Cells (MCFC). Porous nickel electrodes were prepared by loose powder sintering, slurry casting and tape casting techniques. These efforts are directed toward gaining a better understanding of and improving...

article

CO2 stability on the Ni low-index surfaces: van der Waals corrected DFT analysis

Kamil Czelej, Karol Cwieka, Krzysztof Jan Kurzydlowski

Catalysis Communications > 2016 > 80 > C > 33-38

Carbon dioxide stability on the nickel low-index surfaces has been studied by means of van der Waals corrected spin-polarized density functional theory. A number of possible CO₂/Ni_surface conformations with negative adsorption energy were identified. The partial density of states combined with the effective bond order results indicate significant activation of the CO bond by enhanced charge transfer...

article

Decomposition of activated CO2 species on Ni(110): Role of surface diffusion in the reaction mechanism

Kamil Czelej, Karol Cwieka, Tomasz Wejrzanowski, Piotr Spiewak, more

Catalysis Communications > 2016 > 74 > Complete > 65-70

Chemisorption and decomposition of CO₂ on Ni(110) surface have been studied by means of spin-polarized density functional theory calculations. Several possible CO₂/Ni(110) conformations with similar adsorption energies were found. The bonding nature of the adsorbed CO₂ was further analyzed on the basis of partial density of states (PDOS) and effective bond order (EBO) results, indicating the enhanced...

article

The influence of pore size variation on the pressure drop in open-cell foams

Jakub Skibinski, Karol Cwieka, Tadeusz Kowalkowski, Bartlomiej Wysocki, more

Materials & Design > 2015 > 87 > Complete > 650-655

The paper concerns pressure drop in open-cell foam structures in correlation with variation in size of pores. The foam structures with different coefficients of variation of the pore volume CV(V) were designed using procedure based on Laguerre–Voronoi tessellations (LVT). Geometry of the generated structures was compared with the geometry of alumina foam filters used for casting. Pressure drop was...

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Search results for: Karol Cwieka

Characterization of Spatial Distribution of Electrolyte in Molten Carbonate Fuel Cell Cathodes

Catalytic activity of NiO cathode in molten carbonate fuel cells

Development of Molten Carbonate Fuel Cells at Warsaw University of Technology

CO2 stability on the Ni low-index surfaces: van der Waals corrected DFT analysis

Decomposition of activated CO2 species on Ni(110): Role of surface diffusion in the reaction mechanism

The influence of pore size variation on the pressure drop in open-cell foams

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INFONA - science communication portal

Search results for: Karol Cwieka

Characterization of Spatial Distribution of Electrolyte in Molten Carbonate Fuel Cell Cathodes

Catalytic activity of NiO cathode in molten carbonate fuel cells

Development of Molten Carbonate Fuel Cells at Warsaw University of Technology

CO2 stability on the Ni low-index surfaces: van der Waals corrected DFT analysis

Decomposition of activated CO2 species on Ni(110): Role of surface diffusion in the reaction mechanism

The influence of pore size variation on the pressure drop in open-cell foams

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