Molecular, pressure, and thermal diffusion in nonideal multicomponent mixtures

Abstract

A formalism based on powerful concepts of the thermodynamics of irre®ersible pro-

Mathematical formulation and numerical modeling of wax deposition in pipelines from enthalpy–porosity approach and irreversible thermodynamics

“…; n À 1 and D T j ¼ ½D T j;i are the molecular diffusion coefficients and the thermal diffusion coefficients in phase j, respectively. Firoozabadi et al [38,39] describe the methodology for calculating molecular and thermal diffusion coefficients. Eq.…”

The dynamic Flory-Huggins-Zuo equation of state

“…Nevertheless, for the treatment of reservoir fluid dynamics, the vast literature have developed the general theory of multicomponent mixture flow and transport under dynamic processes cf. Bird et al [65], Ghorayeb and Firoozabadi [66,67], and Chen [68]. The derivation of the dynamic FHZ EoS in this paper is based on this general theory.…”

“…x i is the mole fraction of component i. The general expression of J i for an N c -components system has been derived in Ghorayeb and Firoozabadi [66]. The derivations are based on the entropy balance expression combined with the phenomenological equations and Onsager reciprocal relations [69,70].…”

Ternary diffusion coefficients of diethanolamine and N-methyldiethanolamine in aqueous solutions containing diethanolamine and N-methyldiethanolamine

“…When the total molar density (C) is a constant, −D ij C j , in Eqs. (1) and (2), may reduce to −CD ij x j (x i is the mole fraction of component i), which are the relations used by Ghorayeb and Firoozabadi [16]. Deng and Leaist [14] developed a simple least-squares procedure to calculate the ternary Employing the absorption advantages of each amine, the aqueous blended amines have been proposed as potential absorbents for acid gases removal in the absorption processes [17].…”