Monte Carlo Modeling for Dynamic Prediction of Water Size Distribution in Water-Crude Oil Emulsion

Document Type : Research Article

Authors

Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, I.R. IRAN

Abstract

In this study, the dynamic evolution of water droplets size in crude oil due to aggregation and sedimentation phenomena are modeled by the Monte Carlo technique. The predicted results are compared to the NMR experimental data. The effect of type and concentration of emulsifier, water volume ratio, mixing rate and water salinity on the droplet size distribution are evaluated. The adequate agreement between the model results and experimental data reveals the model capability in the description of the aggregation and sedimentation processes in water/crude oil separation. The average size of water droplets is increased with a small rate at the initial period of the separation process. The probability of droplets collisions due to the random motion and sedimentation mechanisms are increased by increasing the size of the droplets. An increase in the aggregation among the droplets increases the average diameter of droplets evolution rate while the aggregation is decreased within a long time and the average size of droplets is approached to a steady value.

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[1] Randolph A.D., Larson, M.A., “Theory of Particulate Processes”, London: Academic Press (1979).
[2] Sandu A., A Newton–Cotes Quadrature Approach for Solving the Aerosol Coagulation EquationAtmospheric Environment36(3): 583-589 (2002).
[3] Marchisio D.L., Vigil R.D., Fox R.O., Quadrature Method of Moments for Aggregation–Breakage ProcessesJournal of Colloid and Interface Science258(2): 322-334 (2003).
[5] Gelbard F., Seinfeld J.H., Simulation of Multicomponent Aerosol DynamicsJournal of Colloid and Interface Science78(2): 485-501 (1980).
[6] Landgrebe J.D., Pratsinis S.E., A Discrete-Sectional Model for Particulate Production by Gas-Phase Chemical Reaction and Aerosol Coagulation in the Free-Molecular RegimeJournal of Colloid and Interface Science139(1): 63-86 (1990).
[7] Gillespie D.T., A General Method for Numerically Simulating the Stochastic Time Evolution of Coupled Chemical ReactionsJournal of Computational Physics22(4): 403-434 (1976).
[8] Shah B.H., Ramkrishna D., Borwanker J.D., Simulation of Particulate Systems Using  the Concept of the Interval of QuiescenceAIChE Journal23(6): 897-904 (1977).
[9] Smith M., Matsoukas T., Constant-Number Monte Carlo Simulation of Population BalancesChemical Engineering Science53(9): 1777-1786 (1998).
[10] Maisels A., Einar K.F., Fissan H., Direct Simulation Monte Carlo for Simultaneous Nucleation, Coagulation, and Surface Growth in Dispersed SystemsChemical Engineering Science59(11): 2231-2239 (2004).
[11] Meimaroglou D., Roussos A.I., Kiparissides C., Part IV: Dynamic Evolution of the Particle Size Distribution in Particulate Processes. A Comparative Study between Monte Carlo and the Generalized Method of MomentsChemical Engineering Science, 61: 5620 (2006).
[12] Amani A., Solaimany Nazar A.R., Sabzyan H., Azimi G., The Measurement of Droplet Size Distribution of Water-Oil Emulsion Through NMR MethodJournal of Particle Science and Technology2(1): 31-39 (2016).
[13] Opedal N.V.D.T., Sørland G., Sjöblom J., Methods for Droplet Size Distribution Determination of Water-in Oil Emulsions using Low-Field NMRDiffusion Fundamentals9(7): 1-29 (2009).
[14] Serra T., Colomer J., Casamitjana X., Aggregation and Breakup of Particles in a Shear FlowJournal of Colloid and Interface Science187(2): 466-473 (1997).
[15] Zhang J.J., Li X.Y., Modeling Particle‐Size Distribution Dynamics in a Flocculation SystemAIChE Journal49(7): 1870-1882 (2003).
[16] Zhao H., Zheng C., Xu M., Multi-Monte Carlo Approach for General Dynamic Equation Considering Simultaneous Particle Coagulation and BreakagePowder Technology154 (2–3): 164–178 (2005).
[17] Zhao H., Maisels A., Matsoukas T., Zheng C., Analysis of Four Monte Carlo Methods for the Solution of Population Balances in Dispersed SystemsPowder Technology173: 38-5 (2007).