Síntesis en fase gaseosa de dimetil carbonato con CO2 y CH3OH sobre Cu-Ni/AC. Estudio cinético

Autores/as

  • Oscar Felipe Arbeláez-Pérez Universidad Cooperativa de Colombia
  • Sara Domínguez Cardozo Universidad de Antioquia https://orcid.org/0000-0001-8916-2783
  • Andrés Felipe Orrego Romero Universidad de Antioquia
  • Aída Luz Villa Holguín Universidad de Antioquia https://orcid.org/0000-0002-3770-3223
  • Felipe Bustamante Universidad de Antioquia

DOI:

https://doi.org/10.17533/udea.redin.20190941

Palabras clave:

metanol, catalizadores, mecanismo de reacción, velocidad de reacción, análisis FT-IR in situ

Resumen

Se reporta la actividad catalítica en la formación de dimetil carbonato a partir de dióxido de carbono y metanol sobre catalizadores mono y bimetálicos de Cu-Ni soportado en carbón activado. Los catalizadores bimetálicos presentaron una mayor actividad catalítica que los monometálicos, siendo la muestra Cu:Ni-2:1 el mejor catalizador. La caracterización de los materiales mediante análisis de difracción de rayos X, microscopía electrónica de transmisión y dispersión metálica permitieron sugerir una explicación al porqué de su mejor desempeño. Se realizaron experimentos de FT-IR in situ para investigar el mecanismo de formación de carbonato de dimetilo a partir de metanol y dióxido de carbono sobre Cu-Ni: 2-1. Se estudió la cinética de la síntesis directa de dimetil carbonato en fase gaseosa sobre Cu:Ni-2:1 soportado en carbón activado, a 12 bar y temperaturas entre 90 °C y 130 °C, como función de la presión parcial del dióxido de carbono y del metanol. Los datos experimentales fueron consistentes con un mecanismo Langmuir-Hinshelwood, el cual incluyó la adsorción de dióxido de carbono y metanol sobre los sitios activos del catalizador (Cu, Ni, y Cu-Ni), siendo la reacción del dióxido de carbono adsorbido con las especies metoxi como etapa limitante. La energía de activación aparente estimada de la reacción fue 94.2 kJ mol-1.

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Biografía del autor/a

Oscar Felipe Arbeláez-Pérez, Universidad Cooperativa de Colombia

TERMOMEC, Facultad de Ingeniería.

Sara Domínguez Cardozo, Universidad de Antioquia

Grupo de Investigación en Catálisis Ambiental. Departamento de Ingeniería Química, Facultad de Ingeniería. Estudiante de Maestría en Ingeniería Química.

Andrés Felipe Orrego Romero, Universidad de Antioquia

Grupo de Investigación en Catálisis Ambiental, Departamento de Ingeniería Química, Facultad de Ingeniería.

Aída Luz Villa Holguín, Universidad de Antioquia

Doctor en Agronomía. Grupo de Investigación en Catálisis Ambiental, Departamento de Ingeniería Química, Facultad de Ingeniería.

Felipe Bustamante, Universidad de Antioquia

Grupo de Investigación en Catálisis Ambiental, Departamento de Ingeniería Química, Facultad de Ingeniería.

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Publicado

2020-12-10

Cómo citar

Arbeláez-Pérez, O. F., Domínguez Cardozo, S., Orrego Romero, A. F., Villa Holguín, A. L., & Bustamante, F. (2020). Síntesis en fase gaseosa de dimetil carbonato con CO2 y CH3OH sobre Cu-Ni/AC. Estudio cinético. Revista Facultad De Ingeniería Universidad De Antioquia, (95), 88–99. https://doi.org/10.17533/udea.redin.20190941

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