APLICACIÓN DEL MÉTODO DE DISPERSIÓN DE MATRIZ EN FASE SÓLIDA AL AISLAMIENTO DE HIDROCARBUROS DE ROCAS BITUMINOSAS
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Universidad Industrial de Santander
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Se realizó la comparación de tres técnicas diferentes para el aislamiento de hidrocarburos y biomarcadores de rocas bituminosas. Las técnicas de extracción por dispersión de la matriz en fase sólida (MSPD, por sus siglas en inglés), Soxhlet y extracción sólido-líquido asistida por ultrasonido se usaron para extraer hidrocarburos de cuatro muestras de roca diferentes. La técnica MSPD permitió extraer 25% y 32% más de materia orgánica que las técnicas Soxhlet y de extracción con solvente, respectivamente. El análisis SARA mostró que los extractos obtenidos por las tres técnicas tuvieron la misma composición relativa de estas familias de hidrocarburos (saturados, aromáticos, resinas y asfaltenos). Se empleó la mezcla diclorometano-metanol (90:10 v/v) como solvente, en las tres técnicas. La extracción por MSPD requirió de cuatro a siete horas, mientras que las otras técnicas demandaron hasta 24 horas. En MSPD, utilizando los mismos implementos, se pudo incrementar cuatro veces la masa de la roca a extraer, sin alterar significativamente el rendimiento de la extracción.
Three different techniques for hydrocarbon and biomarker isolation from bituminous rocks were compared in this work. Matrix solid phase dispersion (MSPD), Soxhlet and sonication-assisted solid-liquid extraction, were used to extract hydrocarbons from 4 different rock samples. The MSPD technique enabled the extraction of 25 and 32% more organic matter than Soxhlet and solvent extraction techniques respectively. The SARA analysis showed that the extracts obtained with these techniques had the same relative composition of these hydrocarbon families (saturated, aromatic, resins and asphalthenes). A dichloromethane:methanol (90:10 v/v) mixture was used as solvent in MSPD, which required between 4 and 7 hours, while the other techniques employed up to 24 hours. In MSPD, using the same glassware, the amount of rock can be increased by a factor of 4, without significantly affecting the extraction yield.
Three different techniques for hydrocarbon and biomarker isolation from bituminous rocks were compared in this work. Matrix solid phase dispersion (MSPD), Soxhlet and sonication-assisted solid-liquid extraction, were used to extract hydrocarbons from 4 different rock samples. The MSPD technique enabled the extraction of 25 and 32% more organic matter than Soxhlet and solvent extraction techniques respectively. The SARA analysis showed that the extracts obtained with these techniques had the same relative composition of these hydrocarbon families (saturated, aromatic, resins and asphalthenes). A dichloromethane:methanol (90:10 v/v) mixture was used as solvent in MSPD, which required between 4 and 7 hours, while the other techniques employed up to 24 hours. In MSPD, using the same glassware, the amount of rock can be increased by a factor of 4, without significantly affecting the extraction yield.
Keywords
Bituminous rock, Soxhlet, sonication, matrix solid phase dispersion (MSPD), geochemistry, Roca bituminosa, Soxhlet, ultrasonido, dispersión de matriz en fase sólida (MSPD), geoquímica