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Aumento de la capacidad de almacenamiento de hidrógeno utilizando tetrahidrofuranos.

Takeshi Sugahara1, Joanna C Haag, Pinnelli S R Prasad

  • 1Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, Osaka, Japan.

Journal of the American Chemical Society
|September 29, 2009
PubMed
Resumen

Los investigadores exploraron el almacenamiento de hidrógeno en hidratos de tetrahidrofurano (THF), logrando una capacidad de 3,4% en peso. Este estudio demuestra que el hidrógeno puede ocupar grandes jaulas en hidratos promovidos por THF, contrariamente a los hallazgos anteriores.

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Área de la Ciencia:

  • Ciencia de los materiales Ciencia de los materiales.
  • Ingeniería Química Ingeniería Química.
  • Almacenamiento de energía Almacenamiento de energía

Sus antecedentes:

  • El almacenamiento de hidrógeno en hidratos es crucial para las aplicaciones de energía limpia.
  • El papel de las moléculas promotoras como el tetrahidrofurano (THF) en la formación de hidrógeno hidratado y la capacidad de almacenamiento sigue siendo objeto de investigación.
  • Estudios anteriores sugirieron limitaciones en la ocupación de hidrógeno dentro de las grandes jaulas de hidratos basados en promotores.

Objetivo del estudio:

  • Investigar la capacidad de almacenamiento de hidrógeno y la ocupación de la jaula en hidratos de hidrógeno promovidos por tetrahidrofurano (THF).
  • Explorar un nuevo método de preparación para hidratos de hidrógeno-THF.
  • Para determinar el efecto de la concentración de THF en la eficiencia del almacenamiento de hidrógeno.

Principales métodos:

  • Un nuevo método de preparación que consiste en mezclar el THF en polvo sólido con hielo, seguido de presurización con hidrógeno (70 MPa, 255 K).
  • El análisis se realizó mediante espectroscopia de microsonda Raman.
  • La difracción de rayos X en polvo y el análisis volumétrico del gas se emplearon para evaluar el almacenamiento de hidrógeno.

Principales resultados:

  • La capacidad de almacenamiento de hidrógeno depende en gran medida de la composición del THF.
  • Contrariamente a los informes anteriores, se observó que las moléculas de hidrógeno ocupan grandes jaulas en los hidratos de estructura II THF+H(2) con fracciones molares THF por debajo de 0,01.
  • Se logró una capacidad máxima de almacenamiento de hidrógeno de aproximadamente el 3,4% en peso en el sistema de hidrato THF + H 2 .

Conclusiones:

  • Este estudio demuestra con éxito la ocupación de grandes jaulas por hidrógeno en hidratos promovidos por THF.
  • Los hallazgos desafían las suposiciones anteriores sobre las limitaciones de los promotores en la ocupación de la jaula de hidrógeno hidrato.
  • El efecto sintonizable del contenido de THF ofrece potencial para el desarrollo de soluciones avanzadas de almacenamiento de hidrógeno para futuras aplicaciones científicas y prácticas.