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Almacenamiento de metano en jaulas de coordinación porosas basadas en ruedas de remo

Casey A Rowland, Gregory R Lorzing, Aeri J Gosselin

¹Center for Neutron Research , National Institute of Standards and Technology , Gaithersburg , Maryland 20899 , United States.

Journal of the American Chemical Society

|August 21, 2018

Resumen

Los investigadores desarrollaron nuevas jaulas de coordinación porosas basadas en carbazoles con superficies récord. Estos materiales demuestran altas capacidades de adsorción de metano debido al diseño optimizado de los poros, lo que mejora las soluciones de almacenamiento de gas.

Área de la Ciencia:

Ciencias de los materiales
Química
Nanotecnología

Sus antecedentes:

La adsorción de gases en materiales porosos es crucial para el almacenamiento y la separación.
Las jaulas de coordinación porosas están poco exploradas para la adsorción de gases a pesar de su potencial.
Los datos de superficie a menudo faltan para estos sistemas moleculares.

Objetivo del estudio:

Sintetizar y caracterizar nuevas jaulas de coordinación porosa basadas en carbazolos.
Para investigar sus propiedades de adsorción de gases, en particular la absorción de metano.
Establecer nuevos puntos de referencia para la superficie de las jaulas de coordinación.

Principales métodos:

Síntesis y caracterización de las jaulas de coordinación basadas en carbazoles.
Los protocolos de activación para lograr grandes áreas de superficie.
Las mediciones de adsorción de gas (Brunauer-Emmett-Teller - BET) a alta presión.
Difracción de neutrones en polvo para el análisis de la estructura de los poros.

Principales resultados:

Un análogo de cromo logró una superficie BET récord de 1235 m2/g.
La síntesis y activación optimizadas produjeron grandes áreas de superficie para múltiples jaulas.
La jaula de cromo mostró capacidades significativas de adsorción de metano (CH4) (194 cm3/g y 148 cm3/cm3 a 65 bar).

Conclusiones:

Las jaulas de coordinación porosas basadas en carbazolos son prometedoras para aplicaciones de almacenamiento de gas.
El control preciso sobre la síntesis y la activación es clave para maximizar el área de superficie y la adsorción.
El diseño óptimo de los poros en estas jaulas conduce a una alta absorción de metano.

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