CARACTERIZACIÓN NO INVASIVA DE EMULSIONES W/O A FRECUENCIAS DE MICROONDAS
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Universidad Industrial de Santander
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En este trabajo se presenta una técnica no invasiva de medida, para caracterizar dieléctricamente emulsiones agua en aceite (w/o). Por primera vez se preparan en el laboratorio emulsiones w/o, con fases continuas de composición química diferente: ácido oleico y SAE40. Se emplea la técnica de sonda coaxial que permite determinar en forma simultánea el porcentaje de agua de la emulsión y la influencia de la composición de la fase continua en las propiedades dieléctricas de la emulsión. Esto tiene un gran interés, pues emulsiones similares se pueden encontrar en varias industrias durante y al final de la producción, tales como refinerías de petróleo, plantas químicas, farmacéuticas etc. El conocimiento obtenido de las propiedades dieléctricas permite predecir el comportamiento de las emulsiones ante la presencia de un campo electromagnético, y posteriormente ser la base para el diseño de sensores para procesos industriales, o de laboratorio, donde se requiera separar y/o caracterizar emulsiones w/o.
In this work, a non-invasive measurement technique is presented, to characterize the dielectric properties of Water in Oil emulsions (W/O). It is for the first time reported a comparison of w/o emulsions prepared with different continuous phases: oleic acid and mineral oil (SAE40). An open-ended coaxial probe is used to simultaneously determine the water percentage and the influence of the continuous phase chemical composition on the final emulsion dielectric properties. The results are of great interest because similar emulsions can be obtained in many industries during and after production processes, such us oil refineries, chemical plants, pharmaceutical plants, etc. The knowledge about the emulsions allows predicting their behaviour under the presence of an electromagnetic field, and can be used to design sensors or microwave applicators in industrial processes in which could be necessary to characterize or separate these W/O emulsions.
In this work, a non-invasive measurement technique is presented, to characterize the dielectric properties of Water in Oil emulsions (W/O). It is for the first time reported a comparison of w/o emulsions prepared with different continuous phases: oleic acid and mineral oil (SAE40). An open-ended coaxial probe is used to simultaneously determine the water percentage and the influence of the continuous phase chemical composition on the final emulsion dielectric properties. The results are of great interest because similar emulsions can be obtained in many industries during and after production processes, such us oil refineries, chemical plants, pharmaceutical plants, etc. The knowledge about the emulsions allows predicting their behaviour under the presence of an electromagnetic field, and can be used to design sensors or microwave applicators in industrial processes in which could be necessary to characterize or separate these W/O emulsions.
Keywords
Microwaves, Open-ended Coaxial Probe, Emulsions, Dielectric Properties., Microondas, Sonda Coaxial, Emulsiones, Propiedades Dieléctricas.