Publicado

2017-07-01

Remoción de hidrocarburos de aguas de producción de la industria petrolera utilizando nanointermedios compuestos por SiO2 funcionalizados con nanopartículas magnéticas

Crude oil removal from production water using nano-intermediates of a SiO2 support functionalized with magnetic nanoparticles

Palabras clave:

Agua de Producción, Adsorción, Nanointermedio, Petróleo, Pirólisis, Oxidación (es)
Production water, Adsorption, Nano-Intermediates, Oil, Pyrolysis, Oxidation (en)

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El principal objetivo de este trabajo es desarrollar nanointermedios compuestos por un soporte micrométrico de SiO2 funcionalizado con nanopartículas magnéticas para la adsorción de hidrocarburos emulsionados en agua. SiO2 con tamaño < 20 μm fue funcionalizada con nanopartículas de magnetita de 97 nm en una relación de 5% p/p. La eficiencia del nanointermedio fue evaluada mediante experimentos de adsorción por lotes bajo diferentes condiciones de temperatura, pH, salinidad y concentración de crudo. Tanto para el soporte de SiO2 como para el nanointermedio, la cantidad máxima de adsorción se alcanza para tiempos inferiores a 100 minutos. Las capacidades adsortivas del nanointermedio fueron comparadas utilizando un material comúnmente empleado en la industria petrolera. Adicionalmente, los materiales pueden ser regenerados mediante procesos térmicos para su posterior reutilización. Se observó que la inclusión de las nanopartículas de magnetita al soporte de SiO2 proporciona un efecto catalítico en la descomposición de los hidrocarburos adsorbidos.
This work aims to develop nano-intermediates adsorbents based on micrometric silica functionalized with magnetite nanoparticles with high efficiencies in the oil removal, additionally to high catalytic activities in the decomposition of the crude oil adsorbed. Silica with sizes < 20 μm were functionalized with 5 wt% of magnetite nanoparticles. The efficiency of the adsorbents was evaluated through batch adsorption experiments of oil from oil in water emulsions at different pH, salinity and oil concentration using a UV-vis spectrophotometer. Results showed that for both the SiO2 support and the synthesized nano-intermediate, the adsorption equilibrium was reached in less tan 100 min. A comparison was made by employing a material typically used in the oil and gas industry. After the adsorption process, the materials can be recovered and regenerated trough thermal processes. It was observed that the magnetite nanoparticles over the support act as a catalyst for decomposition of the adsorbed oil.

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