T = total j = refers tojth microsphere Superscripts -= Laplace transformed quantity
LITERATURE CITEDAbramowitz, M., and I. A. Stegun, "Handbook of Mathematical Functions," ed., Dover (1972). Aifantis, E. C., "A New Interpretation of Diffusion in High DiffusivityPaths-a Continuum Approach," Acta Metallurgica, 27, 683 (1979). Brenner, H., "The Stokes Resistance of an Arbitrary P a r t i c l e p a r t V.A thorough search for electrocatalysts for anodic oxygen evolution from caustic potash solution together with an investigation for the main reasons of ohmic potential drops in the interelectrode gap has lead to a new concept for an advanced medium temperature (150" to 200°C), medium pressure (30 to 100 bars) alkaline water electrolysis. The new concept will allow electrolytic water decomposition at temperatures between 160" and 200°C with current densities of 1 to 1.5 A/cm2 and cell voltages between 1.55 and 1.65 V. ond HARTMNT WENDT lnstitut fur Chemische Technologie Technische Hochschule Dannrtadt Petersenrtr. 20, D-610 Dormstadt, FRO
SCOPEMixed oxides known to catalyze cathodic oxygen reduction were tested under technical working conditions (current densities 0.5 to 1.5 A/cmz, 80" to 260°C, 30 to 60 bars) and judged investigated in order to find electrodeldiaphragm configurations which minimize or eliminate the voltage drop caused by this bubble curtain effect.
. -Correspondence concerning this paper should be addressed to H. Wendt.~i -i~i -8 0 3 8 9 8 0~9 4 -$ 0 i . o 5 .
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