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Modelado integrado basado en la física y microfluidos para cuantificar la disolución de carbonatos multifásicos en

Junyoung Hwang1, Siqin Yu1, Cynthia M Ross1

  • 1Department of Energy Science and Engineering, Stanford University, Stanford, USA. ibattiat@stanford.edu.

Lab on a chip
|August 29, 2025
PubMed
Resumen
Este resumen es generado por máquina.

La disolución ácida de las rocas carbonatadas es clave para las aplicaciones energéticas. Este estudio revela que las burbujas de gas CO2 reducen significativamente las tasas de disolución, un hallazgo crucial para el modelado del flujo multifásico.

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Área de la Ciencia:

  • Geoquímica y Ciencias de los Materiales
  • Dinámica de flujo multifásico
  • Ingeniería Química

Sus antecedentes:

  • La disolución ácida de las formaciones carbonatadas es vital para la transición energética y las aplicaciones de ingeniería.
  • Las dinámicas de disolución son complejas, influenciadas por el flujo, la mineralogía y la producción de burbujas de gas CO2, creando sistemas multifásicos.
  • La cuantificación de los efectos del flujo multifásico en las tasas de disolución de carbonato ha sido experimentalmente desafiante.

Objetivo del estudio:

  • Investigar la disolución de carbonatos en condiciones de flujo monofásico y multifásico utilizando dispositivos microfluídicos.
  • Cuantificar el impacto de la formación de burbujas de gas CO2 en las velocidades efectivas de reacción.
  • Desarrollar y validar un enfoque basado en el aprendizaje automático para analizar la dinámica de la disolución.

Principales métodos:

  • Se utilizaron dispositivos microfluídicos con muestras de rocas ricas en carbonato.
  • Empleó imágenes de alta velocidad y segmentación de imágenes basada en aprendizaje automático para la visualización y la cuantificación.
  • Análisis ML combinado con modelado basado en la física para determinar las tasas de reacción.

Principales resultados:

  • Validación de una ley de velocidad de reacción de primer orden para la disolución de carbonato monofásico.
  • Se observó una disminución de un orden de magnitud en la velocidad de disolución efectiva en condiciones multifásicas debido al blindaje del gas CO2.
  • Heterogeneidad de roca identificada que conduce a capas porosas que facilitan la nucleación y el crecimiento de burbujas de gas.

Conclusiones:

  • Los modelos actuales no capturan el impacto del blindaje de gas en las velocidades de reacción efectivas en el flujo multifásico.
  • El modelo conceptual para la disolución de la calcita necesita revisión para tener en cuenta el blindaje de gases y la heterogeneidad de las rocas.
  • Los hallazgos son críticos para el modelado preciso de los procesos subterráneos en aplicaciones energéticas.