Methane migration in a saturated solid system

From a case study where a failure of natural gas pipe occurs, it was decided to evaluate the migration of a reference gas through a saturated solid medium. For this, the Fick's law was employed, since it allows the modeling of systems of mass transport, considering the dispersion coefficient and gas velocity. These parameters are obtained from the measurement of the gas concentration. In this case, it was decided to take advantage of the high solubility in water, which produces a rapid reaction and, therefore, the formation of an acid that reduces the pH of the liquid, being the method of unconventional evaluation. This process will be carried out based on a 2x3x3x3 factorial design, where the matrix, the height of the solid column, the pipeline operating pressure and the diameter of the hole through which the gas enters are taken as factors. Moreover, a comparison between the sensor data of full and middle-size was carried out to show if the video taken when the size is reduced to the half, represents the total size model. Also, the consistency of the experimental data adjustment model and the residual analysis of the experimental design were evaluated, obtaining an adjustment coefficient greater than 82.42% in all cases. Furthermore, the image analysis was done to characterize the behavior of the gas through the solid medium. Finally, the results showed that the factor that has the most considerable influence is the matrix, followed by the height of the column, the diameter of the hole through which the gas leaves and finally the pressure. On the other hand, from the image analysis it was observed that the formation of a tumult is generated on the gas dispersion zone, that has on average a length of 13 cm and a height of 2 cm, which depends on the pressure and the diameter, following the same trend that the concentration data presented in the first part.

• Autores: Rodríguez Sanguino, Laura Alejandra
• Tipo de recurso: Trabajo de grado de pregrado
• Fecha de publicación: 2019
• Institución: Universidad de los Andes
• Repositorio: Séneca: repositorio Uniandes
• Idioma: eng
• OAI Identifier: oai:repositorio.uniandes.edu.co:1992/44413
• Acceso en línea: http://hdl.handle.net/1992/44413
• Palabra clave: Procesos químicos; Flujo viscoso; Ingeniería del gas; Ingeniería química; Ingeniería
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/