Prediction of Vapor-Liquid Equilibria of Undefined Mixtures

Abstract

Katz man, ., "A Research and Development Program for Catalysis in CoalConversion Processes", Report No. EPRI 207-0-0 for Electric Power Research Institute (1974).

New Correlation for Calculating Critical Pressure of Petroleum Fractions

“…This relationship use specific gravity boiling point as input parameters for their proposed expressions: Winn [10] developed convenient nomographs to estimate various physical properties including molecular weight and the pseudocritical pressure for petroleum fractions. Sim and Daubert [11] developed analytical relationships that closely matched the monograph graphical data. The authors used specific gravity and boiling point as the correlating parameters for calculating the critical pressure of the undefined petroleum fraction: = 3.48242 × 10 9 −2.3177 2.4853…”

Characterization of hydrocarbon systems by DBE concept

“…The same type of equation for predicting molecular weight from a given boiling point and specific gravity is used by Riazi and Daubert (1980a). On the basis of a data set that was larger than the one used in 1957, Riazi and Daubert (1980a) got different coefficients from those found by Sim and Daubert (1980). Trytten and Gray (1990) noted that molecular-weight data estimated by using the method by Sim and Daubert (1980) are at least 10% higher than measured values.…”

“…On the basis of a data set that was larger than the one used in 1957, Riazi and Daubert (1980a) got different coefficients from those found by Sim and Daubert (1980). Trytten and Gray (1990) noted that molecular-weight data estimated by using the method by Sim and Daubert (1980) are at least 10% higher than measured values. Their feedstocks were narrow-boiling fractions of syncrude coker gas oil, characterized by their large specific gravities and high content of aromatic carbon atoms.…”

“…The average and maximum error of their new correlation have been given as 2.2% and 18.7%. The equation published by Sim and Daubert (1980) is based on the graphical procedure by Winn (1957). The same type of equation for predicting molecular weight from a given boiling point and specific gravity is used by Riazi and Daubert (1980a).…”

A New Multi-Sample EOS Model for the Gas Condensate Phase Behavior Analysis

“…A great improvement suggested by Soave (1972) was substitution of the attractive term of the RK-EOS with a more general parameter that depends on the reduced temperature and acentric factor of the substance. Later, Graboski and Daubert (1978) and Sim and Daubert (1980) suggested better correlations for dependency of the attractive parameter to acentric factor to improve the predictions of the vapor pressures of pure substances. The Equation of state introduced by Peng and Robinson (1976) has become one of the most widely used models for petroleum fluid properties prediction.…”