Chemical engineering
Print ISSN : 0375-9253
Volume 34, Issue 9
Displaying 1-17 of 17 articles from this issue
  • 1970 Volume 34 Issue 9 Pages 909-910
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
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  • Yuji Kawamura
    1970 Volume 34 Issue 9 Pages 911-915
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
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  • Masashi Asaeda, Morio Okazaki
    1970 Volume 34 Issue 9 Pages 915-921
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
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  • Tsuyoshi Munakata
    1970 Volume 34 Issue 9 Pages 922-929
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
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  • Sukeharu Kawamura, Hideo Schinagawa
    1970 Volume 34 Issue 9 Pages 930-935
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
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  • Mompei Shirato, Toshiro Murase
    1970 Volume 34 Issue 9 Pages 936-940
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
  • [in Japanese]
    1970 Volume 34 Issue 9 Pages 941-952
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
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  • N2-CO2, H2-CO2 system
    Masahiro Yorizane, Shooshin Yoshimura, Hirokatsu Masuoka
    1970 Volume 34 Issue 9 Pages 953-957,a1
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
    An experimental apparatus was developed for me aeuring the relations of vapor-liquid equilibria at high pressure by vapor circulating method. A special feature of the appa-ratus was the. The liquid surface in the equilibrium cell was detected with floating magnetic needle coupled. Vapor-liquid equilibrium data for hydrogen-carbondioxide system at 0°C were obtained by the apparatus up to 370atm. and the data of nitrogencarbondioxide system at 0°C were also obtained. Eeima-tion of the vapor-liquid equilibrium was carried out by the BWR zed constants. The results of calculation were not so good. But it was ascertained that the method is useful when the BWR constants are not evailable.
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  • Terukatsu Miyauchi, Chia-Nan Shyu
    1970 Volume 34 Issue 9 Pages 958-964,a1
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
    The radial distribution of gas hold up and the circalations of liquid were measured by a sampling method in a gas-bubble column of 10cm diameter.
    A theory of circulation is presented, which assumes a dual structure of turbulent core flow and a laminar wall sublayer.
    Experimental results are used in the theory to calculate the effective turbulent viscosity in the column. Some other data are discussed by the theory to show the effect of column diameter on the viscosity and the liquid circulation.
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  • Yoshishige Hayashi, Eiji Hirai
    1970 Volume 34 Issue 9 Pages 965-971,a1
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
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    This paper proposes two analytical methods to obtain the over-all volumetric enthalpy transfer coefficients incross-flow cooling towers with the idea of cross-fiow heat exchangers, assuming that the actual satulated enthalpy of the air can be numerically determined as the first degree in temperature and the numerical values calculated by these two methods is compared with the values of the graphical method reported by Uchida.
    As the result, authors find that the methods rePorted in this paper are considerably resonable and further it becomes clear that the numerical values of over-all volumetric en thalpy transfer coefficient for cross-flow cooling towers can be calculated more easily by these two methola than by the past methods.
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  • Drying Rate of Various Liquids Contained in Silica-alumina Catalyst
    Shigeaki Kasaoka, Kuniaki Nitta, Yusaku Sakata, Nariaki Murao
    1970 Volume 34 Issue 9 Pages 972-978,a1
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
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    An experimental investigation of the Fick modelfor ffusion have been made of a liquid phase transfer wtporous solida of different shape-sizes. The restective speci of alcohols, hydrocarbons and carbontetrachloride was impregnated and contained uniformly in the pores of cylindrical or ring type silicaaluminas. The transfer (drying) rates were measured using the thermanobalance in constant air flow and low temperature (25 to 70°C), under which the vapor pressure was markedly low and the external mass transfer resistance was almost negligible. It was confirmed that these rates obey the unsteady state diffusion model macroscopically under constant overall effective diffusivity, De except for the case water transfer. and that this procedure is simple and accurate for the estimation of De, the characteristics of Pore structrues.
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  • Hideo Saito, Ikuho Yamada, Hidezumi Sugie
    1970 Volume 34 Issue 9 Pages 978-984,a1
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
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    It has been wellknown that the θ method by Lyster has often applied to solve the operational problem of multicomponent distillation. This method, using the correction parameter z, has been recently developed to non-ideal systems by Hirose and his coworker.
    Discussing the convergence process of θ method by the geometrical consideration, the authors have shown the reason for the inconsistency of convergence depending on the nonideality, and have proposed the modified θ method by meams of “Regula-Falsi” method to obtain the converged solution, which requires less iteration number than other method.
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  • Norio Kimura, Mompei Shirato
    1970 Volume 34 Issue 9 Pages 984-990,a1
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
    Dry cloth filters are commonly used under heavy dust loading conditions, and it is essentially of practical importance to estimate the effects of dust loading on the collection efficiency of filters. In this report, the increment 477, of collection efficiency of a single thread due to dust loading is obtained experimentally, and an empirical formula for collection efficiency is presented in terms of the operating conditions and the characteristics of filter cloth and dusts.
    It becomes experimentally evident that one-side napped cloth should be used under the condition of the napped surface downstreames because of its higher efficiency.Fabric structures of sateen and 2/3 twill are excellent in both of collection efficiency and pressure drop.
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  • Akira Kanagawa
    1970 Volume 34 Issue 9 Pages 991-996,a1
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
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    The response curves of the forward light scattering aerosol particle counter have been obtained with various optical geometries in both the hollow cone illumination type and the central dark stop collection type.
    The response to be expected from spherical transparent particles have been calculated from Mie theory and Gucker-Hodkinson equation, taking into acount the spectrum characteristics of the light source and the phototube. And, the influence of the counter optical geometry on the counter performances, such as the sensitivity, the linearity and the dependency on the refractive index of the aerosol particle, has been discussed.
    It has been pointed out that the forward light scattering counter might not be suitable to determine the aerosol particle size in submicron range.
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  • Rearrangement of Optical Lens Geometry
    Akira Yokochi, Akira Kanagawa
    1970 Volume 34 Issue 9 Pages 997-1001,a1
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
    The characteristics of the sideways light scattering aerosol particle counter has been improved by rearrangement of the optical lens geometry to recieve more forward angle scattering light. Four counters with different optical lens geometry, employing respectively 60°, 70°, 80° and 90° mean scattering angle, have been constructed, and the calibration of these counters has been performed with uniform size polystyrene latex spheres.
    The photo electrical pulses from a phototube are measured and counted automatically with the multichannel pulse height analysing technique, which is utilized widely in the field of nuclear science. The experimental values of counter responses are in good agreement with theoretical responses calculated by Mie theory of light scattering by transparent spherical particles.
    As a result of theoretical and experimental studies on sideways counter, it has been found that the 60° counter has the most excellent characteristics among the test counters. The sensitivity of the 60° counter is three fold higher than that of the 90° counter, and there is little difference in the linearity of both counters.
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  • Akihiro Iguchi, Kensi Fuse
    1970 Volume 34 Issue 9 Pages 1001-1005,a1
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
    Solubility curve and tie-lines were determined for the systems acetic acid+water+tetrachloroethylene and acetic acid+water+carbon tetrachloride at 25°C.The concentration of acetic acid at plait point was obtained from extranolation of the following correlation line, log χw vs.(ye-xe)/χw where xw is acetic acid concentration (wt. fraction) in organic layer and yw is acid concentration (wt. fraction) in water layer.
    The data for lower concentration region were well correlated by Hirata's plots log yw/(1-ye) vs. log χw/(1-χw) For the acetic acid+water+chlorinated hydrocarbon syst ems. cloudy states did not appeared and phases were separated below nearly 20 wt % or above nearly 80 wt % of c hlorinated hydrocarbons, perhaps, due to the difference o f densities and interfacial tension of water- and organic p hases.
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  • Saburo Yashima, Yoshiteru Kanda, Shoichi Morohashi
    1970 Volume 34 Issue 9 Pages 1006-1006,a1
    Published: September 05, 1970
    Released on J-STAGE: October 07, 2010
    JOURNAL FREE ACCESS
    By the observation of fracture surfaces of single spherical particles we obtained the following results, 1) the fracture surfaces of specimens of glassy materials were mainly of concoidal structure, 2) the status of fracture surface of mineral specimens having incomplete cleavage was quite irregular and 3) the specimens of minerals having complete cleavage were fractured along to their cleavage plane.
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