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Volume 13 (1980)
- Issue 6 Pages 433-
- Issue 5 Pages 343-
- Issue 4 Pages 257-
- Issue 3 Pages 173-
- Issue 2 Pages 87-
- Issue 1 Pages 1-
Volume 13, Issue 2
Displaying 1-16 of 16 articles from this issue
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ATSUSHI IKARI, YASUO HATATE, KUNIO TANAKA1980 Volume 13 Issue 2 Pages 87-89
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSPurified kerosene was fractionated for 5°C rise in boiling point. Vapor-liquid equilibria of each fraction containing a minute amount of diethyl sulfide of w-propyl mercaptan were measured at 1 atmosphere. The equilibrium ratios of the minor components in each fraction are expressed as functions of the boiling point of the fraction.View full abstractDownload PDF (200K) -
ICHIRO ISHIZUKA, EIJI SARASHINA, YASUHIKO ARAI, SHOZABURO SAITO1980 Volume 13 Issue 2 Pages 90-97
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSA group contribution model is developed, based on the hole theory, for thermodynamic properties of pure liquids of normal alkanes, aromatics and their solutions, including heats of vaporization, pVT relations and activity coefficients. In the present model, the combinatorial factor is approximated by the Flory-Huggins expression, the free volume is expressed by a simplified Henderson''s approximation, and a lattice potential energy is made up of pair interaction contributions of segments. By using parameters determined with data reduction of pure liquids and their solutions, pure liquid properties over a wide reduced-temperature range from 0.3 to 0.8 and mixture properties such as activity coefficients are accurately predicted and correlated. Since an equation of state derived from the present new model satisfies the ideal gas limit at infinite volume, it is applied to estimate thermodynamic properties of gaseous phase.View full abstractDownload PDF (544K) -
TOMOSHIGE NITTA, YUKIHIRO NAKAMURA, HIDEYUKI ARIYASU, TAKASHI KATAYAMA1980 Volume 13 Issue 2 Pages 97-103
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSExperimental data of nitrogen solubilities in four binary solvents with acetone and those of excess molar volumes of the solvents are presented at 25°C. Cyclohexane, benzene, chloroform, and 2-propanol are selected as the other component. The experimental excess quantities of gas solubility are represented almost quantitatively by a generalized equation of Flory-Huggins type with physical and chemical terms. It is also shown that the similarity between the excess quantity of gas solubility and the relative excess molar volume holds for the systems investigated except for the benzene-acetone system.View full abstractDownload PDF (534K) -
ISAO KOMASAWA, TSUTAO OTAKE, MOTOYOSHI KAMOJIMA1980 Volume 13 Issue 2 Pages 103-109
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSThe dynamical behavior of a single and a pair of spherical-cap bubbles was investigated while they were held stationary by means of a downward liquid flow in a vertical channel. No significant differences were found in behavior such as bubble geometry, rising velocity, or liquid velocity profile around a bubble, for free-rising bubbles in a stationary liquid pool and for the present bubbles held stationary in a water channel.
The fluid dynamical properties of the wake behind spherical-cap bubbles were classified by Reynolds number, as a laminar wake (10<Re<90), a transitional wake (90<Ree<500), and a turbulent wake (Re>500). The laminar wakes of the preceding bubbles had a decisive effect on the rising velocity of the trailing bubbles, in which an additional velocity component caused by the wakes of the preceding bubbles was correlated well with the wake velocities. The turbulent wakes had a limited effect on the acceleration of the trailing bubbles and often caused them to break up.View full abstractDownload PDF (725K) -
HAJIME NAKAMURA, AKIHIRO MATSUURA, JUMEI KIWAKI, SETSURO HIRAOKA, IKUH ...1980 Volume 13 Issue 2 Pages 110-116
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSTheoretical and experimental studies were made of the heat transfer at the thermal entrance region in a horizontal triangular duct, to obtain the local and mean Nusselt number of combined free and forced laminar convection for high Prandtl number fluid under the boundary condition of uniform wall temperature.
For a region without free convection effects a solution of Nusselt number based on Leveque''s method was shown for arbitrary triangular ducts. On the other hand, for a region with the free convection effects a numerical solution of Nusselt number using the finite difference method for the triangular coordinate system was proposed for isosceles triangular ducts with apex angles of 30, 60 and 90 degrees.
Furthermore, the influence of the rotation angle around the horizontal axis on Nusselt number was examined and suggested to be relatively small.
The experimental results obtained by the electrochemical method support fairly well the theoretical results.View full abstractDownload PDF (497K) -
KANICHI SUZUKI, HIDEAKI HOSAKA, RYOHEI YAMAZAKI, GENJI JIMBO1980 Volume 13 Issue 2 Pages 117-122
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSParticles were dried in a vibro-fluidized bed and the drying characteristics in a constant drying rate period are discussed. Ion exchange resin particles were used for sample because they were fluidized smoothly even at a somewhat high moisture content.
The effects of vibration on the uniformity of moisture content in the bed were remarkable when air velocities become lower than the minimum fluidization velocity umf. The bed could be dried uniformly and it had no moisture content distributions under the appropriate vibrational conditions, even when air velocities were lower than umf.
The uniformity of moisture content in the bed depended upon air velocity, vibrational intensity, and height of bed.View full abstractDownload PDF (431K) -
YUJI NAKA, MASAYUKI TERASHITA, SATOSHI HAYASHIGUCHI, TAKEICHIRO TAKAMA ...1980 Volume 13 Issue 2 Pages 123-129
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSTo save energy in a distillation column, engineers have discussed the application of side-boilers and side-coolers and heat pumps to a distillation column. But no quantitative method which represents the relationship between temperature level and the minimum exchanging heat load of heat source and/or coolant at any plate has been developed. It is very difficult to design a distillation column with such equipment.
This paper represents the energy-saving effects of a side-boiler and a side-cooler on a distillation column on the basis of exergy concepts, and then proposes a quantitative method to determine the feasible domains for the use of a side-boiler and a side-cooler, and to clarify the important relationship mentioned above. This method can be used to design a distillation column with a heat pump and a multi-effective distillation system.View full abstractDownload PDF (481K) -
ISAO KOMASAWA, TSUTAO OTAKE, AKIRA YAMADA1980 Volume 13 Issue 2 Pages 130-136
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSThe aqueous solubilities of hydroxyoxime extractant and equilibria of copper extraction from sulphate media were studied, using several organic solvents as examples of aliphatic or aromatic diluents. The diluent effect on the equilibrium correlation was reasonably explained, taking account of both the interaction between oxime molecules to form a dimeric oxime and between oxime and diluent molecule to form an inert solvated complex. The oxime molecules were adsorbed predominantly as a monomeric form at the aqueous-organic interface, which was saturated at rather small bulk concentration in the organic phase.View full abstractDownload PDF (560K) -
MASAYUKI HORIO, HIROSHI KIYOTA, IWAO MUCHI1980 Volume 13 Issue 2 Pages 137-142
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSParticle motion in the grid zone above a perforated plate distributor was investigated with 15-cmφ circular and 10-cmφ semicircular fluidized beds. Tracer method was applied to observe dead zone shape and particle movement visually. The particle motion in the grid zone was found to be rather stable, similarly to that in a spouted bed. Particle entrainment rate in a jet was determined from the observed values of particle stream function in the annular region. This particle circulation, which is the essential scheme of gas-solid contact in grid zone, is mainly controlled by the gas velocity through an orifice. Dead zone is formed under a mechanism similar to that of bulk solids flow in a bin. Correlations are presented for estimating the size of true and pseudo-dead zones and the particle turnover rate in the pseudo-dead zone.View full abstractDownload PDF (513K) -
YASUO KOUSAKA, KIKUO OKUYAMA, YOSHIYUKI ENDO1980 Volume 13 Issue 2 Pages 143-147
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSA basic study of re-entrainment of dust particles from collecting media of dust collectors by air stream has been made. It is pointed out in the analysis of the re-entrainment mechanism that the bending stress induced by drag plays an important role and that the critical diameter of particle to be re-entrained is proportional to -2/3 power of velocity gradient. It is suggested from experiment that aggregate particles, once collected on the collecting media, are fairly stable in usual operation of dust collectors where velocity gradient is not so large.View full abstractDownload PDF (373K) -
KOJI TAKAHASHI, KUNIO ARAI, SHOZABURO SAITO1980 Volume 13 Issue 2 Pages 147-150
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSA new power correlation for both anchor and helical ribbon impellers in highly viscous Newtonian liquids is proposed on the basis of a physical model developed from an analytical approximate expression for the drag of a plate in viscous liquids bounded by a plane wall. The correlation, obtained by inserting the empirical factor of geometrical variables in the above expression, shows good agreement with experimental data of power consumption of anchor and helical ribbon agitators obtained in this work and other literature.View full abstractDownload PDF (252K) -
SHIGEO KATOH, Eizo SADA1980 Volume 13 Issue 2 Pages 151-154
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSThe volumetric coefficients of overall mass transfer in affinity chromatography were obtained for benzamidine, trypsin, and β-galactosidase in Sepharose 4B and 6B columns. The volumetric coefficients decreased with molecular weight and with the degree of cross-linking of the adsorbents. The column productivities of the Sepharose 6B-STI column were higher than those of the Sepharose 4B-STI column because of the high operating velocity. In affinity chromatography of β-galactosidase, on the other hand, the column productivity of the Sepharose 6B-PAPTG column was extremely lower than that of the Sepharose 4B-PAPTG column.View full abstractDownload PDF (295K) -
YOSHIYUKI TANAKA, MAKOTO NAKAJIMA, HIRONOBU KUBOTA, TADASHI MAKITA1980 Volume 13 Issue 2 Pages 155-159
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSDownload PDF (374K) -
KATSUMI TOCHIGI, MAYUMI HIRAGA, KAZUO KOJIMA1980 Volume 13 Issue 2 Pages 159-162
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSDownload PDF (298K) -
HAJIME UNNO, FUMIO KIKUCHI, TAKASHI AKEHATA1980 Volume 13 Issue 2 Pages 162-164
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSDownload PDF (223K) -
NORIO ARAI, IKUO HORI, MASANOBU HASATANI, SACHIO SUGIYAMA1980 Volume 13 Issue 2 Pages 165-168
Published: April 20, 1980
Released on J-STAGE: April 03, 2006
JOURNAL FREE ACCESSDownload PDF (303K)
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