Studies of Transport of Asphaltenes through Membranes Using Hindered Diffusion Theories for Spheres and Spheroids

Autor:	Muhammad Sahimi, Theodore T. Tsotsis, V. S. Ravi-Kumar
Rok vydání:	1997
Předmět:	Membrane Analytical expressions Chemistry General Chemical Engineering Monte Carlo method Spheroid Thermodynamics SPHERES General Chemistry Scaling Boundary element method Industrial and Manufacturing Engineering Asphaltene
Zdroj:	Industrial & Engineering Chemistry Research. 36:3154-3162
ISSN:	1520-5045 0888-5885
DOI:	10.1021/ie960598c
Popis:	The results of ongoing efforts by this group to model the transport of asphaltene molecules through model membranes are presented. A model is described which aims to capture the effect of the polydisperse nature of asphaltene molecules on their transport properties. The asphaltene structure is generated stochastically using Monte Carlo techniques. Individual asphaltene molecules are approximated as spheroids for the purpose of calculating their hindered diffusivities. Continuum hydrodynamic theories and boundary element methods are used to calculate the diffusion coefficients. A number of analytical expressions, scaling relationships, and approximations utilized in the literature are evaluated.
Databáze:	OpenAIRE
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