Viscosities of 1-Iodoalkanes. New Experimental Data, Prediction, and Analysis

Abstract

This study reports the atmospheric pressure viscosity data of liquid 1-iodopropane, 1-iodobutane, 1-iodopentane, 1-iodooctane, 1iodononane, 1-iododecane, and 1-iodododecane along with relevant densities of the last five homologues from 253.15 to 423.24 K. It is demonstrated that the atmospheric pressure viscosities of 1-chloroalkanes and 1-iodoalkanes are similar to the (n + 3) and (n + 6) n-alkanes, respectively. At the same time, although the packing fractions of 1chloroalkanes are most probably similar to the pertinent n-alkanes, in the case of 1-iodoalkanes, such parallels seem to be questionable. Apparently, the latter could explain a success of the entirely predictive modeling framework coupling CP-PC-SAFT with modified Yarranton−Satyro correlation (MYS) [Ind. Eng. Chem. Res. 2015, 54, 6999] in estimating the viscosities of 1-chloroalkanes with the recommended values of critical constants and a desirability of optimizing the experimentally unavailable T c and P c , in cases of 1-iodopropane and further homologues. Besides that, the elevated pressure viscosities of iodoethane exhibit a substantially weaker pressure dependence than the equivalent data of n-octane, which is truthfully predicted by CP-PC-SAFT + MYS. In addition, the residual entropy-based approach of Novak [Int. J. Chem. React. Eng. 2011, 9, A107] predicts the viscosities of both 1-chloroalkanes and 1-iodoalkanes in the less reliable manner than CP-PC-SAFT + MYS. From the fragmental experimental data, an extent of phase splits in the binary systems of 1-iodoalkanes is wider than in the pertinent mixtures of (n + 6) n-alkanes, which is also predicted by CP-PC-SAFT in a reliable manner.

Implementation of CP-PC-SAFT and CS-SAFT-VR-Mie for Predicting Thermodynamic Properties of C1–C3 Halocarbon Systems. I. Pure Compounds and Mixtures with Nonassociating Compounds

“…The critical point-based development of PC-SAFT (CP-PC-SAFT) aims at addressing two issues, namely, accurately estimating densities in the entire thermodynamic phase space while obeying the experimental values of T c and P c along with replacing fitting of the pure compound substance-specific parameters by a standardized and transparent Cubic EoS-style numerical solution. Previously this model was implemented for predicting data in the systems of certain nonrefrigerant halocarbons. − In addition to this, recently, Fu et al have applied it for predicting VLE and densities in the system CO 2 (1)–R1234ze­(E). The SAFT of variable range and Mie potential parametrized by a corresponding states approach by Mejía et al (CS-SAFT-VR-Mie) offers another predictive parametrization scheme for the substance-specific adjustable parameters along with the more advanced theoretical background.…”

Measurement and Modelling of the Interfacial Tensions of Co2 + Decane-Iododecane Mixtures at High Pressures and Temperatures

“…The properties of CO 2 and n-decane were obtained from NIST standard reference database [29]. As such data other than molar mass are experimentally unavailable for 1-iododecane, its critical properties were estimated by a Marrero-Morejón and Pardillo-Fontdevila correlation [30,31] and the acentric factor was estimated based on its reduced saturation vapour pressure at T r = 0.7 [32][33][34][35]. a T c and p c of 1-iododecane were estimated by a Marrero-Morejón and Pardillo-Fontdevila correlation [30,31]; ω of 1-iododecane was estimated from the equation ω = -log 10 (p r sat ) -1, where p r sat is the reduced saturation vapour pressure at T r = 0.7.…”