202005kayfuj0journalOriginalKayukawa, Y.[Yohei]Fujii, K.Higashi, Y.[Yukihiro]J. Chem. Eng. Data20052005-04-15Vapor-Liquid Equilibrium (VLE) Properties for the Binary Systems Propane (1) + n-Butane (2) and Propane (1) + Isobutane (3)PTxy data (bubble-point and dew-point pressures at a specific composition) for two binary systems, propane (1) + n-butane (2) and propane (1) + isobutane (3), are presented in this paper. These binary systems are under consideration for use as a refrigerant for a Lorentz cycle. A recirculation method along with the aid of a new composition measurement system was employed. The experimental uncertainty is 3 mK for temperature, 0.027% + 1.04 kPa for pressure, and 0.11 mol % for composition. A total of 60 data points were obtained in the temperature range of (270 to 310) K for propane (1) + n-butane (2) and (260 to 320) K for propane (1) + isobutane (3). Comparisons of the present data with available mixture thermodynamic models and other experimental data are discussed in this paper.vapor-liquid equilibriumpropanebutaneisobutane50579-5821propaneC3H81Commercial source199.994Stated by supplier2None used2butaneC4H101Commercial source199.994Stated by supplier2None used32-methylpropaneC4H101Commercial source199.994Stated by supplier2None used1121Principal objective of the workSJRTRC3/21/20051Vapor or sublimation pressure, kPaEbulliometric method (Recirculating still)LiquidDirect value, X1Author95AuthorStandard deviation of a single value (unbiased)LiquidGas1Mole fraction1Liquid1Author952Temperature, K1Author951.17444227061142.641.0385021.0411.42264227061231.841.0625861.0411.6662422706131741.085591.0411.87024227061388.241.1048141.0411.17344228061197.941.0534331.0411.43274228061319.741.0863191.0411.59064228061394.441.1064881.0411.87044228061521.841.1408861.0411.32944229061371.741.1003591.0411.59474229061525.541.1418851.0411.69344229061586.241.1582741.0411.80394229061675.141.1822771.0411.3094230061449.541.1213651.0411.38784230061532.841.1438561.0411.48044230061593.241.1601641.0411.64884230061720.641.1945621.0411.16924231061471.141.1271971.0411121Principal objective of the workSJRTRC3/21/20051Mole fractionChromatography1GasDirect value, X1Author95GasLiquid1Mole fraction1Liquid1Author952Temperature, K1Author951.17444227061.461641.000507761.42264227061.755841.000831381.66624227061.893541.000982851.87024227061.965841.001062381.17344228061.458541.000504351.43274228061.742741.000816971.59064228061.848441.000933241.87044228061.960341.001056331.32944229061.642541.000706751.59474229061.83641.00091961.69344229061.884841.000973281.3094230061.533941.000587291.38784230061.670341.000737331.48044230061.743341.000817631.64884230061.849241.000934121.16924231061.35541.00039051131Principal objective of the workSJRTRC3/21/20051Vapor or sublimation pressure, kPaEbulliometric method (Recirculating still)LiquidDirect value, X1Author95AuthorStandard deviation of a single value (unbiased)LiquidGas1Mole fraction1Liquid1Author952Temperature, K1Author951.3414226061161.241.0435241.0411.4774226061190.641.0514621.0411.60784226061218.141.0588871.0411.8034226061259.641.0700921.0411.87784226061276.341.0746011.0411.21694227061195.141.0526771.0411.39474227061245.541.0662851.0411.60354227061305.241.0824041.0411.79414227061357.441.0964981.0411.23834227061200.141.0540271.0411.33574227061227.441.0613981.0411.53114227061280.841.0758161.0411.61314227061306.541.0827551.0411.70474227061333.541.0900451.0411.78784227061356.941.0963631.0411.8384227061370.841.1001161.0411.18344228061252.341.0681211.0411.34414228061315.541.0851851.0411.44054228061350.941.0947431.0411.56864228061398.741.1076491.0411.67494228061440.741.1189891.0411.80954228061492.541.1329751.0411.42494229061462.741.1249291.0411.494229061499.841.1349461.0411.58384229061546.641.1475821.0411.28334230061520.441.1405081.0411.39894230061589.841.1592461.0411.5314230061671.841.1813861.0411.63694230061737.841.1992061.0411.754230061813.341.2195911.0411.8186423006185741.231391.0411.87764230061890.441.2404081.0411.27274232061855.841.2310661.0411.36654232061930.941.2513431.0411.550642320611103.151.2978371.0411.640742320611194.751.3225691.0411.765542320611318.351.3559411.0411131Principal objective of the workSJRTRC3/21/20051Mole fractionChromatography1GasDirect value, X1Author95GasLiquid1Mole fraction1Liquid1Author952Temperature, K1Author951.3414226061.617241.000678921.4774226061.74441.00081841.60784226061.829941.000912891.8034226061.917541.001009251.87784226061.955541.001051051.21694227061.443141.000487411.79414227061.897441.000987141.23834227061.477941.000525691.33574227061.595741.000655271.53114227061.7641.0008361.61314227061.823941.000906291.70474227061.874841.000962281.78784227061.914341.001005731.8384227061.933341.001026631.18344228061.350841.000385881.34414228061.57241.00062921.44054228061.665941.000732491.56864228061.769241.000846121.67494228061.829541.000912451.42494229061.648441.000713241.494229061.679641.000747561.58384229061.771541.000848651.28334230061.463341.000509631.39894230061.610141.000671111.5314230061.725241.000797721.63694230061.802741.000882971.754230061.873241.000960521.81864230061.909141.001000011.87764230061.936641.001030261.27274232061.40541.00044551.36654232061.51241.00056321.55064232061.710241.000781221.64074232061.785641.000864161.76554232061.864341.00095073