Comparación de producción electroquímica de celdas de combustible microbiana utilizando electrodos de fibra de carbono y un electrodo híbrido de grafito-cabuya (agave americana).

Abstract

The objective of the present titration work is to compare the electrochemical production of microbial fuel cells using carbon fiber electrodes and a hybrid electrode of graphite-cabuya (agave americana), for which activated carbon was obtained from the fiber of the cabuya by means of the chemical activation method, to determine the parameters necessary for modeling in the COMPSOL Multiphysics computational tool, such as electrical conductivity, pH, in addition, the characterization of the solid and liquid sample of the activated carbon fiber of cabuya and graphite. The chemical activation of the carbon was carried out with phosphoric acid at 40 percent concentration at a temperature of 500 degrees Celsius for 1 hour. The identification of the functional groups present in activated carbon was carried out using the spectrophotometer. infrared JASCO FT / IR4100. 3 electrodes were formed with a rectangular geometric of activated carbon obtained from the cabuya, graphite-activated carbon from the cabuya and carbon fiber. The identification of power density in the electrodes was carried out using the COMPSOL Multiphysics computational tool framed in the distribution of secondary currents. The analysis of the electrodes with the computational tool COMPSOL Multiphysics gave us the Mathematical description of the electrodes generating voltages of the cabuya fiber (0.29V), the cabuya-graphite electrode (0.37V) and the carbon fiber electrode (0.62V). It is concluded that the power density of carbon fiber is higher (1537.6 mW / m2) followed by the electrode Cabuya-graphite fiber (547.6 mW / m2) and the Cabuya Fiber electrode (336.4 mW / m2). The use of nanotechnology is recommended for the design and construction of electrodes as part of the model improvements so that electrodes can be identified that allow increasing the cell power density.