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Transporte selectivo de gases a través de membranas de grafeno y óxido de grafeno de pocas capas
Hyo Won Kim1, Hee Wook Yoon, Seon-Mi Yoon
1Department of Energy Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
Science (New York, N.Y.)
|October 5, 2013
Resumen
Las membranas de óxido de grafeno muestran propiedades sintonizables de separación de gases. Las membranas de óxido de grafeno bien entrelazadas logran una alta selectividad de dióxido de carbono / nitrógeno, ideal para la captura de carbono después de la combustión.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Ingeniería Química Ingeniería Química.
- Nanotecnología La nanotecnología es la nanotecnología.
Sus antecedentes:
- El grafeno y el óxido de grafeno (GO) son materiales 2D con propiedades únicas para aplicaciones en membranas.
- Su delgadez, flexibilidad y resistencia ofrecen potencial para tecnologías avanzadas de separación.
Objetivo del estudio:
- Diseñar láminas de grafeno y GO de pocas y varias capas para la separación selectiva de gases.
- Para investigar la relación entre los métodos de apilamiento, la estructura de los poros y el comportamiento de transporte de gas.
- Evaluar la idoneidad de las membranas de GO para la captura de dióxido de carbono.
Principales métodos:
- Fabricación de membranas de óxido de grafeno en capas con diferentes grados de entrelazamiento.
- Caracterización de las propiedades de transporte de gas a través de canales y poros de flujo de gas controlados.
- Evaluación de la selectividad de dióxido de carbono/nitrógeno en diferentes condiciones de humedad.
Principales resultados:
- El comportamiento de transporte de gases sintonizables se observó en membranas GO en capas (3-10 nm).
- La selectividad de la difusión de gas fue controlada por canales de flujo de gas y poros diseñados a través de métodos de apilamiento.
- Se logró una alta selectividad de dióxido de carbono / nitrógeno con membranas GO bien entrelazadas en alta humedad relativa.
Conclusiones:
- Las láminas de grafeno y óxido de grafeno diseñadas pueden lograr las características deseadas de separación de gases.
- El enclavamiento dentro de la estructura de apilamiento del GO es crucial para el transporte de gas sintonizable.
- Las membranas GO bien entrelazadas son prometedoras para la captura de dióxido de carbono después de la combustión en las corrientes humidificadas.
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