Relative volatilities of the ethane-ethylene system from total pressure measurements

Abstract

Vitaii, G.; Berchiesi, M. A.; Berchiesi, G. J. Chem. Eng. Data 1979, 24, 169. Castellani, F.; Berchiesi, 0.; Pucckrelll, F.; Bartocci, V. J. Chem. Eng. A new apparatus has been developed for maklng vapor pressure measurements on hlgh-pressure systems. Uslng thls equlpment, we have made a large number of new total pressure measurements on the ethane-ethylene blnary from 198.15 to 278.15 K. By Integration of the general coexlstence equatlon, relatlve volatllltles have been calculated for ethane-ethylene over the entlre temperature range.

Transferable potentials for phase equilibria. Improved united‐atom description of ethane and ethylene

“…Already in 1976, Fredenslund et al reported on measurements of the binary VLE at 263.15 and 293.15 K . This was followed in 1982 by the work of Barclay et al covering a wider range of 198.15 K 278.15 K. This was followed by the work of Calado et al at 161.39 K . Considering the practical importance of this system and for improving the transferability of the ethylene force field, binary VLE for the ethane/ethylene mixture are considered as an additional criterion in the force field development.…”

Precision Total Pressure Measurements of Propyne with Propane, Propene, and Propadiene

“…The equipment and techniques developed to measure mixture vapor pressures drew heavily on past experiences with similar cells described by Barclay (1980), Flebbe (1980), and Burcham (1981). A welded cell design similar to that of Barclay was chosen to avoid problems with mechanical seals at the pressures of this study.…”

Plant−Model Mismatch Analysis in Deethyleniser Simulation. 2. Application to Data-Model Selection and Tuning

“…In order for such a comparative study to be meaningful, three distinct k ij categories of the ethylene/ethane binary interaction coefficient were used for each K-value data model. The k ij categories studied for all three EOSs were the k ij ) 0.0000 (ideal mixing rule), k ij PRO/II default, and k ij -optimized data models using the ethylene/ethane binary data of Barclay et al 10 Only the optimized ethylene/ethane binary interaction coefficients are used with the Panagiotopoulos-Reid mixing rule. The commercial data models examined all used the same PRO/II default PR enthalpy and vapor density together with Rackett liquid density data models, thus validating the comparison of their different K-value data models.…”

“…The REGRESS data regression software tool was applied to the ethylene/ethane VLE data of Barclay et al, 10 consisting of 77 data sets covering the complete composition range. Manual optimization procedures were adopted using the REGRESS program in its data validation mode, after the REGRESS automatic optimization facilities had been shown to be inadequate for the task of obtaining highly accurate and globally optimized binary interaction coefficients as required for systems of very low relative volatility.…”

“…The EOS data models used were the Soave-Redlich-Kwong (SRK), Peng-Robinson (PR), and Benedict-Webb-Rubin-Starling (BWRS) data models and were similar to those used in the studies of Hernandez et al 5 In addition to using the classic quadratic mixing rule as in previous studies, the Panagiotopoulos-Reid mixing rule was also examined as applied to both the SRK and PR cubic equations of state (CEOSs). The commercial EOS K-value data models were tuned by optimizing the associated ethylene/ethane binary interaction coefficient using the PRO/II 8 associated software tool REGRESS 9 as applied to the VLE data of Barclay et al 10 Manual optimization procedures were adopted after the REGRESS automatic optimization facilities, which make use of the weighted Orthogonal Distance Regression algorithm, had been shown to be inadequate for the task. The plant data used here were obtained from a controlled test run after a major revamp of the deethyleniser aimed at increasing throughput and efficiency.…”