Gas Adsorption Modelling of the Oxidative Coupling of Methane (OCM) Process on Zeolite X Molecular Sieves

dc.contributorOrjuela Londoño, Alvaro
dc.contributorRodriguez Niño, Gerardo
dc.contributorGrupo de Investigación en Procesos Químicos y Bioquímicos
dc.creatorRodriguez Paez, Cristian Camilo
dc.date.accessioned2020-02-20T20:58:11Z
dc.date.available2020-02-20T20:58:11Z
dc.date.created2020-02-20T20:58:11Z
dc.date.issued2019
dc.identifierhttps://repositorio.unal.edu.co/handle/unal/75669
dc.description.abstractIn this work was studied the modeling of the adsorption of effluent gases from the methane oxidative coupling process (OCM) on CaX zeolite for the separation of ethylene. To describe the adsorption process, a mathematical model was implemented within the Aspen Adsorption software based on Mass, Energy and Momentum balances, and the Linear Driving Force adsorption rate model. The transport parameters were adjusted from dynamic experimental data in order to validate the proposed mathematical model, to be used in the design of a pressure swing adsorption system (PSA) on an industrial scale. The PSA system can be an alternative to cryogenic distillation for the separation of methane because the methane is not adsorbed on CaX zeolite, and also the zeolite CaX presents selectivity for ethane and ethylene. The ethylene purification process was carried out with cryogenic distillation columns. However, the substitution of the demethanizer unit with a PSA system resulted in an energy saving of 30% and a reduction in utility costs of 18% compared to the traditional cryogenic distillation process.
dc.description.abstractEn este trabajo se estudió el modelamiento de la adsorción de gases efluentes del proceso de acoplamiento oxidativo de metano (OCM) sobre zeolita CaX para la separación de etileno. Para describir el proceso de adsorción un modelo matemático fue implementado dentro del software Aspen Adsorption basado en los balances de Masa, Energía y Momentum, y el modelo de velocidad de adsorción de fuerza impulsora lineal. Los parámetros de transporte fueron ajustados a partir de datos experimentales dinámicos con el fin de validar el modelo matemático propuesto, para ser utilizado en el diseño de un sistema de adsorción por oscilación de presión (PSA) a escala industrial. El sistema de PSA puede ser una alternativa a la destilación criogénica para la separación de metano debido a que la zeolita CaX no adsorbe metano, y además presenta selectividad por el etano y etileno. El proceso de purificación de etileno se llevó a cabo con columnas de destilación criogénica. Sin embargo, al sustituir la unidad demetanizadora por un sistema PSA se presentó un ahorro de energía del 30% y una reducción de costos de utilidad del 18% en comparación con el proceso de destilación criogénica tradicional
dc.languageeng
dc.publisherUniversidad Nacional de Colombia - Sede Bogotá
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dc.titleGas Adsorption Modelling of the Oxidative Coupling of Methane (OCM) Process on Zeolite X Molecular Sieves
dc.typeOtro


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