The Synthesis of Hydrogen Cyanide in a Solid Electrolyte Fuel Cell

1987 ◽  
Vol 134 (8) ◽  
pp. 1925-1929 ◽  
Author(s):  
Nikolas Kiratzis ◽  
Michael Stoukides
Keyword(s):  
Fuel Cell ◽  
Solid Electrolyte ◽  
Hydrogen Cyanide

Smart Processing of Solid Electrolyte Dendrites with Ordered Porous Structures for Fuel Cell Miniaturizations

2011 ◽  
Vol 2011 (CICMT) ◽  
pp. 000017-000022
Author(s):  
Soshu Kirihara ◽  
Katsuya Noritake ◽  
Satoko Tasaki ◽  
Hiroya Abe
Keyword(s):  
Fuel Cell ◽  
Solid Electrolyte ◽  
Solid Electrolytes ◽  
Yttria Stabilized Zirconia ◽  
Porous Structures ◽  
Stabilized Zirconia ◽  
Coordination Numbers ◽  
Aspect Ratios ◽  
Micro Patterning ◽  
Ordered Porous

Solid electrolyte dendrites of yttria stabilized zirconia with spatially ordered porous structures were successfully fabricated for fuel cell miniaturizations by using micro patterning stereolithography. Micrometer order ceramic lattices with the coordination numbers 4, 6, 8 and 12 were propagated spatially in computer graphic space. Aspect ratios of the lattice diameters and lengths were designed between 1.0 and 2.0 to value the porosities in higher levels from 50 to 80 %. On the fabrication process, nanometer sized yttria stabilized zirconia were dispersed in to photo sensitive liquid resins at 30 % in volume fraction to obtain thixotropic slurries. The paste material was spread on a grass substrate with 10 μm in layer thickness by using mechanic knife edge movements, and an ultra violet micro pattern was exposed on the surface to create cross sectional solid layer with 2 μm in part accuracy. After the layer stacking process, the ceramic dispersed resin lattices of 100 μm in diameter were obtained exactly. These composite precursors were dewaxed and sintered at 600 and 1500 °C in an air atmosphere, respectively, and the fine ceramic lattices of 98 % in relative density were created. Gaseous fluid profiles and pressure distributions in the formed ceramic lattices with the various coordination numbers and porosity percents were visualized and analyzed by using finite element method. The fabricated solid electrolytes with the extremely high porosities and wide surface areas are expect to be applied to novel electrodes in the compact fuel cells. The smart processing of the solid electrolytes by utilizing computer aided design, manufacturing and evaluation methods will be demonstrated.

Multiscale Parametric Studies on the Transport Phenomenon of a Solid Oxide Fuel Cell

2005 ◽  
Vol 2 (4) ◽  
pp. 219-225 ◽  
Author(s):  
C. H. Cheng ◽  
Y. W. Chang ◽  
C. W. Hong
Keyword(s):  
Transport Phenomenon ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Solid Electrolyte ◽  
Parametric Study ◽  
Cross Flow ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Distribution Maps ◽  
Operation Temperature

This paper conducts a multiscale parametric study of temperature and composition effects on the transport phenomenon of a solid oxide fuel cell (SOFC). The molecular dynamics technique was employed to study the transport phenomenon of the solid electrolyte, which is made of yttria-stabilized zirconia. The influences of Y2O3 concentration and various operation temperatures on the SOFC were studied. Simulation results show that there exists an optimal concentration of 8mol% of Y2O3 in the composition for oxygen transport. Also higher operation temperature promotes the oxygen ion-hopping process that increases the ionic conductivity. A macroscale parametric study was also conducted in this paper to validate the influence of the temperature uniformity in the solid electrolyte by employing the computational fluid dynamics technique. The temperature distribution maps of a single-cell planar SOFC with coflow, counterflow and cross-flow channel designs are presented. The results conclude that the coflow configuration is the best design of the three.

Synthesis of hydrogen cyanide in a solid-electrolyte-cell reactor

1993 ◽  
Vol 32 (9) ◽  
pp. 1904-1913 ◽  
Author(s):  
Elizabeth A. McKenna ◽  
Alexandros Othoneos ◽  
Nikolas Kiratzis ◽  
Michael Stoukides
Keyword(s):  
Solid Electrolyte ◽  
Hydrogen Cyanide ◽  
Solid Electrolyte Cell ◽  
Cell Reactor

Modeling of HCN synthesis in a solid electrolyte fuel cell

1992 ◽  
Vol 47 (9-11) ◽  
pp. 2951-2956 ◽  
Author(s):  
Elizabeth McKenna ◽  
Michael Stoukides
Keyword(s):  
Fuel Cell ◽  
Solid Electrolyte
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