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Electrolisis de agua alcalina mejorada por campo magnético desde el laboratorio hasta la industria
Hao Li1, Jiakun Fang1, Danji Huang1,2
1State Key Laboratory of Advanced Electromagnetic Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Resumen
Los campos magnéticos impulsan la electrólisis del agua alcalina (AWE) al concentrar iones de hierro, mejorando los sitios activos y aumentando la producción de hidrógeno. Esta estrategia AWE mejorada por campo magnético (ME-AWE) ofrece una solución escalable y rentable para el hidrógeno verde.
Área de la Ciencia:
- La electroquímica es electroquímica.
- Ciencia de los materiales Ciencia de los materiales.
- Ingeniería Química Ingeniería Química.
Sus antecedentes:
- La electrólisis del agua alcalina (AWE) está limitada por el agotamiento del sitio activo y la disipación de la concentración de iones.
- Los métodos convencionales luchan por superar estas limitaciones termodinámicas para una oxidación eficiente del agua.
Objetivo del estudio:
- Desarrollar una estrategia AWE (ME-AWE) mejorada por el campo magnético para mejorar la cinética de la reacción de evolución del oxígeno (OER).
- Para superar el límite de concentración de iones activos y aumentar la cobertura del sitio activo en AWE.
Principales métodos:
- Experimentos a escala de laboratorio con tres electrodos para estudiar la cinética de los OER.
- Desarrollo de un modelo multifísico de acoplamiento de campo magnético, flujo de fluidos, transporte de masas y electroquímica.
- Diseño e implementación de un dispositivo ME-AWE a escala industrial. diseño y implementación de un dispositivo ME-AWE a escala industrial.
Principales resultados:
- El AWE mejorado con campo magnético (ME-AWE) demostró una cinética OER mejorada y una mayor cobertura del sitio activo.
- El modelo multifísico reveló que la modulación magnética permite que la cinética OER a 0.3 ppm de hierro sea equivalente a concentraciones diez veces más altas sin un campo magnético.
- El dispositivo ME-AWE a escala industrial logró un aumento del 24,9% en la salida de hidrógeno a 1,8 V.
Conclusiones:
- La estrategia ME-AWE aborda efectivamente las limitaciones en AWE mediante el enriquecimiento direccional in situ de iones de hierro activos.
- El análisis tecnoeconómico indica una reducción del 10,6% en el costo total de capital de AWE para la producción de hidrógeno a gran escala.
- ME-AWE presenta una solución escalable y de bajo costo para mejorar la eficiencia de AWE y avanzar en la catálisis asistida por impurezas para la producción de hidrógeno verde.
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