JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Print ISSN : 0021-9592
Volume 4 , Issue 4
Showing 1-16 articles out of 16 articles from the selected issue
  • KENJI OCHI, MASAHIRO KATO, KAZUO KOJIMA
    1971 Volume 4 Issue 4 Pages 301-305
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    A new method has been proposed for testing thermodynamic consistency of ternary vapor-liquid equilibrium data. Illustrations are given for two ternary systems. This method makes it possible not only to test quantitatively thermodynamic consistency of ternary vapor-liquid equilibrium data, but also to determine ternary vapor-liquid equilibria from dew point data.
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  • MASAHIRO KATO, TAKAO SATO, MITSUHO HIRATA
    1971 Volume 4 Issue 4 Pages 305-308
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    For the para-xylene-meta-xylene system, bubble points were precisely measured at atmospheric pressure and vapor-liquid equilibrium data were calculated using the Wilson equation. Values of the Wilson parameters δ12 ancJ δ21 were determined to minimize the sum of squares of deviations in the bubble points for all data points, and values of 0.9812 and 1.0196, respectively, were obtained. The average deviation of the present equilibrium data from those of ideal solution was within 0.00005 mole fraction in vapor composition.
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  • MASAHIRO KATO, TAKAO SATO, MITSUHO HIRATA
    1971 Volume 4 Issue 4 Pages 308-311
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    Based on the bubble and condensation point method, vapor-liquid equilibrium data in salt solutions have been measured at atmospheric pressure for the systems methanolethanol-CaCI2 and iso-propanol-water-CaCI2. For the former system, the relative volatility of methanol to ethanol was decreased by the salt effect of GaCI2. For the latter system, the azeotrope could be eliminated by increasing the concentration of CaCl2.
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  • MASAHIRO KATO, TAKAO SATO, HITOSHI KONISHI, MITSUHO HIRATA
    1971 Volume 4 Issue 4 Pages 311-318
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    A new method for determination of vapor-liquid equilibria in ternary systems is proposed, based on the following two relations.
    (1) The bubble point of the equilibrium liquid composition should be equal to the dew point of the equilibrium vapor composition.
    (2) The condensation point of the equilibrium liquid composition should be the bubble point of the equilibrium vapor composition.
    Using these relations described above, vapor-liquid equilibrium relations in ternary systems can be determined from the dew, bubble and condensation point data without the use of other assumptions. A new apparatus was designed for the simultaneous measurement of dew, bubble and condensation points. This apparatus makes it possible to measure dew, bubble and condensation points at any desired composition without analysis.
    Using the present method, vapor-liquid equilibrium relations were determined from experimental dew, bubble and condensation point data at atmospheric pressure for the ternary systems acetone-methanoUwater and methanol-ethanof-dioxane.
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  • ISAO KOMASAWA, SATOSHI MORIOKA, RYOICHI KUBOI, TSUTAO OTAKE
    1971 Volume 4 Issue 4 Pages 319-324
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    A method is proposed for measurement of interaction rates of dispersed phase in a continuous flow stirred tank. In the present work a continuous phase stream and two separate dispersed phase streams, one of them containing a tracer and another not, are fed to a tank. The principle of the method makes use of the fact that the distribution of a tracer in a drop population is dependent on the number of interactions of drops, and can be followed by a light transmittance technique.
    Validity of the application of the method is examined by the measurement of the light transmissions of an especially prepared suspension liquid whose concentration distribution is initially known. The effects of both impeller speed and volume fraction of dispersed phase on the rates of interactions are compared with those of previous investigators.
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  • MASAO YAMAZAKI, TERUKATSU MIYAUCHI
    1971 Volume 4 Issue 4 Pages 324-330
    Published: January 15, 1971
    Released: April 26, 2006
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    Film coefficients of heat transfer for the bubble phase in gas-fluidized fluid-bed contactors are measured experimentally and correlated with operating variables. The coefficients thus obtained are of the same order as the gas film coefficients of mass transfer in tray-type gas liquid contactors. For experimental measurement new devices are developed to detect the fluctuating temperatures of emulsion and gas bubble phases, and also to distinguish the bubble phase from the emulsion phase. The temperature in the emulsion phase is shown to be inhomogeneous, fluctuating locally. Thus the mixing process of the emulsion phase seems to be not as good as has been previously thought.
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  • MASARU SHIMIZU, FUJIO WATANABE, SACHIO SUGIYAMA
    1971 Volume 4 Issue 4 Pages 331-336
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    To predict the effective diffusion coefficient of a porous material, a theoretical equation was derived by using a pore model. However, it cannot be applied to a granular bed of single pore structure.
    From this point of view, the tortuosity factor is introduced into the expression of the effective diffusion coefficient and calculated from penetration experiments of gas in porous materials. As a result, for a granular bed, in the region of large void fraction, the effective diffusion coefficient may be estimated by the presented equation. It may be applied to the diffusion of gas in porous materials.
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  • TERUKATSU MIYAUCHI, TATSUJI KIKUCHI
    1971 Volume 4 Issue 4 Pages 336-339
    Published: January 15, 1971
    Released: April 26, 2006
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    Liquid film coefficients of mass transfer have been measured for dilute packed beds of irregular (εf=0.392) or regular (εf =0.313) packing, applying the diffusion current method. The data obtained show clearly the transition from the region of molecular diffusion controlling to that of concentration boundary layer controlling, both in Stokes flow.
    With increasing flow rate of fluid from zero velocity, the film coefficient starts to transfer from the region of molecular diffusion controlling at Pe*pe≈ 20 for both gas and liquid systems. The transition ends at Re*h ≈ 20 for gas systems, and at Peh ≈ 20 for liquid systems.
    Mass transfer behaviour is approximately expressed as follows for the region of molecular diffusion controlling under Stokes flow:
    Shpe=Shpeo+2.0 Pe*pe1/3
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  • MASAAKI TSUBAKI, HITOSHI HIRAIWA
    1971 Volume 4 Issue 4 Pages 340-348
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    The relationships between the reflux ratio and feed-plate composition, which were found to constitute an essential point in the problems of a design-oriented approach to multicomponent conventional continuous distillation, were investigated. The mole fraction ratio of the light and heavy key components in the feed-plate composition at normal reflux is proposed to be taken equal to that at minimum reflux.
    The calculation method and numerical examples are shown for the above problem.
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  • YASUO HATATE, FUMIYUKI NAKASHIO, WATARU SAKAI
    1971 Volume 4 Issue 4 Pages 348-354
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    Effects of the micromixing on copolymerizalion of styrene and acrylonitrile in dimethylformamide were studied in a continuous stirred tank reactor.
    Since the reaction rate is complicated in dependencies upon the mole fraction of styrene and monomer concentration, the apparent order of reaction varies in the progress of reaction, hence the micromixing has an effect on the conversion and copolymer composition.
    It was suggested from the comparison between theoretical and experimental results that the reactor produded complete micromixing in the range of conditions of the present experiment.
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  • MOTOYUKI SUZUKI
    1971 Volume 4 Issue 4 Pages 354-358
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    A method is presented which describes fluid mixing phenomena in a vessel from the standpoint of scale decay of concentration eddies which are formed by the inlet fluid. Conversion of homogeneous second-order reaction in an agitated vessel is calculated and compared with the data of Worrell and Eagleton. This method seems to effectively describe the phenomena and also suggests a direction for research in this field.
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  • YOSHITAKA KUWAHARA
    1971 Volume 4 Issue 4 Pages 359-363
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    To explain the phenomena of the transition in particle size distribution in a grinding process, the selection function and the distribution function were determined.
    The equation of distribution function obtained experimentally was as follows;
    B(y, ymax)={1-e-a(y/ymax)}/(1-e-a)
    where α is the distribution factor.
    The experiment was carried out by the "single-size fraction" method using a Hardgrove machine, a vibration mill and a ball mill. Five kinds of materials were used.
    The selection function was found to be proportional to the distribution factor, and the distribution function was a function of ymax and(y/ymax).
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  • TAMOTSU KAMIYA, AKIRA KAYANO
    1971 Volume 4 Issue 4 Pages 364-369
    Published: January 15, 1971
    Released: April 26, 2006
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    The correlation of the pitch of ligaments and drop size was studied. We can hardly state the definite relation between the pitch of ligaments and the mean drop size from generating satellite drops, but know that the drop diameter which gives the highest numeral frequency of the main drops is proportional to pitch of ligaments.
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  • HIROSHI YUKAWA, HIROSHI CHIGIRA, TERUHIKO HOSHINO, MINORU IWATA
    1971 Volume 4 Issue 4 Pages 370-376
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    In this study, the fundamental characteristics of a particle bed with electroosmosis were investigated. Especially, the effects of the strength of electric field and the porosity of particle bed on the flow rate of electroosmosis, qE, and the correlation between qE and the electric power were theoretically analysed. These relations were experimentally confirmed.
    The particle beds used in the experiments were composed of particles of silica, calcite, calcium carbonate, and clay, respectively.
    The results showed that qE was proportional to the strength of electric field, the square root of electric power, and the porosity of particle bed in the range of porosity less than about 0.4.
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  • EIJI SARASHINA, YASUHIKO ARAI, SHOZABURO SAITO
    1971 Volume 4 Issue 4 Pages 377-378
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    Vapor-liquid equilibrium data for the nitrogen-methane-carbon dioxide system were measured by static method at -40°C to 0°C and up to 100 atm. The applicability of the BWR equation for this ternary system was examined. A marked improvement in the equilibria was obtained by introducing correction factors determined from the data of each prediction of vapor-liquid binary system.
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  • EIJI SARASHINA, YASUHIKO ARAI, SHOZABURO SASTO
    1971 Volume 4 Issue 4 Pages 379-381
    Published: January 15, 1971
    Released: April 26, 2006
    JOURNALS FREE ACCESS
    The P-V-T-X relation for the carbon dioxide-argon system was measured at 15°C and up to 150 atm by using a glass capillary cell. From the data obtained, fugacities, partial molar volumes and compressibility factor charts were constructed.
    It was found again for the present system that there is a straight-line relationship between pressure and average density of coexisting liquid and vapor.
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