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Ingeniería de poros para la purificación de etileno en un solo paso a partir de una mezcla de hidrocarburos de tres
Baoyong Zhu1, Jian-Wei Cao2, Soumya Mukherjee3
1School of Chemistry and Chemical Engineering, Dezhou University, Dezhou 253023, P.R. China.
Journal of the American Chemical Society
|January 13, 2021
Resumen
Los investigadores desarrollaron nuevos materiales porosos, NPU-1/2, para una separación eficiente del etileno. Estos materiales adsorben selectivamente el acetileno y el etano, lo que permite la producción de etileno de alta pureza a partir de hidrocarburos C2 mezclados.
Área de la Ciencia:
- Ciencias de los materiales
- Ingeniería Química
- Ciencia de la separación
Sus antecedentes:
- Separar el etileno del acetileno y el etano es un desafío debido a propiedades físicas similares.
- La producción eficiente de etileno requiere técnicas avanzadas de separación.
Objetivo del estudio:
- Desarrollar nuevos materiales porosos para la separación selectiva de hidrocarburos C2.
- Para lograr la producción de etileno de alta pureza en un solo paso.
Principales métodos:
- Síntesis de tres redes de coordinación isostruturales porosas (NPU-1, NPU-2, NPU-3) basadas en grupos de metales hexanucleares.
- Caracterización de las estructuras de doble jaula con tamaños ajustables.
- Experimentos de avance dinámico para la separación de mezclas de gases.
- Modelado molecular para comprender los mecanismos de adsorción.
Principales resultados:
- NPU-1/2/3 exhiben estructuras de doble jaula capaces de adsorción selectiva de C2H2 y C2H6 sobre el C2H4.
- El NPU-1 obtiene etileno de pureza >99,9% a partir de una mezcla de C2H2/C2H4/C2H6.
- La selectividad de adsorción se atribuye a la unión de hidrógeno y a las interacciones no covalentes dentro de las jaulas.
Conclusiones:
- Las redes de coordinación porosa desarrolladas ofrecen una solución prometedora para la separación eficiente del etileno.
- Las estructuras de doble jaula sintonizables son clave para lograr una alta selectividad en las mezclas de hidrocarburos C2.
- Este método permite la producción rentable de etileno de alta pureza.
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