Masahiro Yorizane

Measurement of solubility of organic solvents in polyisobutylene using the piezoelectric-quartz sorption method

Abstract The solubilites of five organic solvents (benzene, cyclohexane, n -hexane, toluene and ethylbenzene) in polyisobutylene have been measured using the piezoelectric-quartz sorption method at 25, 40 and 65°C and under low pressures. The consistency of the method is confirmed by a comparison of literature and experimental data. The effect of coating thickness was also investigated, and the results show that the experimental results are independent of thickness in the range ∼ 0.2-1.6 μm. Two different polymers (weight-average molecular weights of 50000 and 100000) were tested to investigate the effect of polymer molecular weight. The results did not differ appreciably. The experimental data are compared with the predictions of the modified UNIFAC method due to Oishi and Prausnitz.

Measurement and estimation of low temperature vapor-liquid equilibrium for the system oxygen-argon at high oxygen concentrations

Abstract Vapor-liquid equilibrium for the oxygen-argon system at high oxygen concentration (99.98% of oxygen) was measured up to 90.17 K at atmospheric pressure

EFFECT OF BAFFLE ON TRAY UNDER OSCILLATING CONDITION

Abstract Effect of baffle on a tray under oscillating conditions has been examined experimentally. To reduce the degree of liquid mixing and liquid channeling under oscillating conditions, it is necessary to install the baffles on tray. Experiments were conducted with the air-water system, ft was found that the pressure drop change can be expressed as a sinusoidal function and the period coincides with tray oscillation. The degree of liquid mixing decreases when the baffles are installed on tray and it also decreases with the increase of liquid flow rate. The pressure drop increases with the installation of baffle on tray. The suitable baffle number on tray is from 4 to 8 and in this region, the degree of liquid mixing reaches minimum and the liquid holdup takes a maximum value. @KEYWORDS: Tray, Oscillating, Liquid mixing, Baffle, Pressure drop, Liquid holdup.

TEMPERATURE MEASUREMENT ERROR BY RADIAL INSERTION OF THERMOCOUPLE IN THERMAL CONDUCTIVITY MEASURING DEVICE

To measure the temperature of the inner part of a material, an axially inserted thermocouple is often used. But, when the measurement by an axially inserted thermocouple is difficult, we must insert the thermocouple radially. In the case of radial insertion, a measuring error usually exists. To know the true temperature by the method of radial insertion of a thermocouple, we must conduct numerical calculations. In this report, numerical calculations have been conducted for the temperature measuring error by radial insertion of thermocouple in a gas thermal conductivity measuring device.2-5