Cyclic voltammetry evaluation of different anode materials for the electrooxidation of coal dissolved compounds in molten KOH and fuel cell simulation

Abstract: This document shows the results of cyclic voltammetry and fuel cell simulation for the process of electrochemical oxidation of soluble coal compounds in molten KOH. It is shown that nickel and some nickel alloys like inconel 600, chromel and alumel are suitable catalytic materials for this...

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Autores:: Cisneros Álvarez, Sebastián Antonio

Tipo de recurso:

Fecha de publicación:: 2014

Institución:: Universidad Nacional de Colombia

Repositorio:: Universidad Nacional de Colombia

Idioma:: spa

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Summary:	Abstract: This document shows the results of cyclic voltammetry and fuel cell simulation for the process of electrochemical oxidation of soluble coal compounds in molten KOH. It is shown that nickel and some nickel alloys like inconel 600, chromel and alumel are suitable catalytic materials for this process at the anode. Exchange current densities vary between 28 and 83 A/m2 and charge transfer coefficients vary between 0.47 and 0.58. Voltammetry experiments also demonstrate that iron alloys, in general, are not suitable for this process because of dissolution of the material. Here voltammetry studies were performed on 410 stainless steel as iron alloy model material. The information obtained after non linear regression analysis to calculate the kinetic parameters for the anodic processes, and that extracted from literature for the cathodic ones, served to solve one proposed model for the continuous steady state operation of a fuel cell for the oxidation of dissolved coal compounds in molten KOH. Comparison of polarization curve and maximum fuel cell power density, obtained by the fuel cell simulation, with those reported by experimental studies show that the proposed model represents the main macroscopic phenomena of this type of systems.

Cyclic voltammetry evaluation of different anode materials for the electrooxidation of coal dissolved compounds in molten KOH and fuel cell simulation

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