Ro. Esposito et al., Phase equilibrium calculations for semicontinuous mixtures subject to gravitational fields, IND ENG RES, 39(11), 2000, pp. 4415-4421
A recently proposed algorithm for performing thermodynamic equilibrium calc
ulations subject to the influence of the gravitational field is extended to
semicontinuous mixtures. The characterization of the continuous families i
s done by a pseudocomponent discretization based on a convenient choice of
orthogonal polynomials to sample the distribution function interval. Then,
adequate quadrature points and weights are calculated. We present results f
or a family of hydrocarbons from C-8 to C-20 with 51 mol % of methane for o
ne-phase, two-phase, three-phase, and near-critical systems. Our results sh
ow the validity of the procedure for simulations of deep reservoirs and hig
h-pressure storage conditions, solving problems with a high number of indep
endent variables.