Compression-factor measurements on ethane and (ethane + carbon dioxide) using a direct method

Excess and unlike-Interaction second virial coefficients and excess molar enthalpy of (0.500CO + 0.500CO2)

“…The basic apparatus and recent modifications have been described previously (1,5) and the reported procedure has been followed here. The pressure change on mixing was measured on a differential pressure gauge (MKS Instruments Inc, Baratron model 315 BD Type 270B) with a claimed accuracy of 0.25 per cent of full scale.…”

“…This work is part of an ongoing study of gas mixtures of industrial importance. (1,2) Measurement of the pressure change on mixing of (0.5A + 0.5B)(g), initially at equal pressures p, allows calculation of the excess second virial coefficients o: (3) o = 2RTDp/{p 2 (1 + Dp/p)}.…”

Second and third virial coefficients for (methane + ethane + carbon dioxide)

“…The results are shown in (5) ) and for (ethane + carbon dioxide) (McElroy et al (4) ), although based on the same experimental results, are not extracted using the MHEMHS model and therefore differ in value from the coefficients in table 1. …”

“…In past years, researchers from the University of Canterbury have experimentally found mixture third virial coefficients for all of these binaries using the direct method (McElroy et al, (3,4) McElroy and Ji Fang (5) ). These previous results were used with the MHEMHS model to calculate unlike-interaction third virial coefficients.…”

Compression factors and virial coefficients of ethene and ethene + ethane mixtures

“…The experimental apparatus used in this experimental study and the procedures were unchanged from those reported in earlier work (3,4). In order to extend the temperature range, a refrigeration system was coupled to the air thermostat.…”