巻号一覧
20 巻 (1987)
- 6 号 p. 557-
- 5 号 p. 443-
- 4 号 p. 335-
- 3 号 p. 213-
- 2 号 p. 111-
- 1 号 p. 1-
20 巻, 2 号
選択された号の論文の21件中1～21を表示しています
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KOHEI OGAWA, CHIAKI KURODA, SHIRO YOSHIKAWA1987 年 20 巻 2 号 p. 111-117
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーTurbulent axial velocity fluctuations at sixteen radial positions in a circular pipe are measured simultaneously, and contour line maps of the velocity are drawn in time-radial position coordinates. On the basis of these maps, the change in velocity radial distribution with time is regarded as a pattern, and the time- and space-scales of the lowerfrequency eddy-group which is predicted to influence the diffusion of fluid element are discussed. By a statistical method based on pattern analysis, the radial distribution of averaged space-scales of eddies is obtained. Additionally, smaller eddies which cannot be found by the statistical method are extracted through direct reading from the contour line maps, and the usefulness of regarding the turbulent flow field as a pattern is made clear.抄録全体を表示PDF形式でダウンロード (574K) -
FORMATION OF NICKEL CONCENTRATION PROFILE IN NICKEL/ALUMINA CATALYST DURING POST-IMPREGNATION DRYINGYOSHIMITSU UEMURA, YASUO HATATE, ATSUSHI IKARI1987 年 20 巻 2 号 p. 117-123
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーNickel concentration profiles were studied for impregnated nickel/alumina catalysts prepared by impregnating two types of spherical aluminas with nickel (II) chloride aqueous solution and applying a wide range of postimpregnation drying conditions. Migration of nickel (II) ion towards the outer surface of alumina occurred during post-impregnation drying. The fraction of migrated nickel (II) ion increased with increase of the constant drying rate, and was held at a constant value, 0.5, at values of the constant drying rate larger than 2 × 10-4kg•m--2•-1.
A model of solute migration during post-impregnation drying, combining solution movement by a capillary force with solute diffusion, was proposed. The observed nickel concentration profiles of the nickel/alumina catalysts showed good agreement with the results calculated by the model over the whole range of drying conditions.抄録全体を表示PDF形式でダウンロード (508K) -
XIA HUANG, HAJIME UNNO, TAKASHI AKEHATA, OKIHIKO HIRASA1987 年 20 巻 2 号 p. 123-128
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーKinetic behavior of a temperature-sensitive water-absorbing gel was analyzed experimentally by using a newly developed water-absorbing polyvinylmethylether gel (PVMEG). The gel showed a volume change phenomenon responding to a temperature change across the temperature of 310 K. It swelled and shrank respectively below and above the transition temperature. A simple mathematical model for the kinetic behavior of the gel is presented and it is found that the simulated behavior of the gel fits very well with the experimental results by employing appropriate values for the parameters included in the model.抄録全体を表示PDF形式でダウンロード (465K) -
TADACHIKA SENO, SHIZUO KAGEYAMA, RYUZO ITO1987 年 20 巻 2 号 p. 128-133
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーAxisymmetric jets have been observed to investigate the effect of controlled pulsation on the behavior of vortex rings by using the hydrogen bubble technique and hot-film measurement. Pulsed jets had similar velocity profiles in the initial region and in the fully developed region. This similar velocity profile was coincident with that in natural jets. The differences between the two kinds of jets in volume rate, in decay of centerline velocity and in distribution of turbulent intensity, were observed to be remarkable in the initial region. Such differences were caused by the different behavior of vortex rings in the initial region. Behavior of vortex rings in the initial region of pulsed jets was roughly classified into three types by Strouhal number, Sr0 (Sr0 ⟨ 0.9, 0.9 ≤ Sr0 ⟨ 2.6, Sr0 ≥ 2.6). It was found that the pulsation for Sr0 = 0.3 was the most dispersive wave in a jet column.抄録全体を表示PDF形式でダウンロード (512K) -
KEN-ICHI KIKUCHI, YUSUKE TADAKUMA, TAKUO SUGAWARA, HIROYASU OHASHI1987 年 20 巻 2 号 p. 134-140
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーMass transfer coefficients between particles and liquid in the region of high particle concentration were obtained by the use of both active and inert particles suspended in solid-liquid two-phase upflow through vertical tubes and in stirred tanks. When adding inert particles of low density such as polystyrene and anion-exchange resin beads, mass transfer coefficients decreased with increasing particle concentration, remarkably above concentrations from 20 to 30%. Meanwhile, the coefficients increased in two-phase tube flow and decreased in stirred tanks when using glass beads. The experimental results were correlated with parameters including (1) the kinematic viscosity of slurry and (2) the effective energy dissipation rate, based on the concept that only a part of the energy supplied contributes to the mass transfer. The first method was successfully applied only to the system containing low-density particles, and the second to systems having either high- or low-density particles. The effectiveness of energy dissipation on mass transfer at high particle concentration is discussed in some detail.抄録全体を表示PDF形式でダウンロード (575K) -
SATORU KATO, JUNJIRO KAWASAKI1987 年 20 巻 2 号 p. 140-145
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーBatch extraction experiments on liquid membrane permeation were conducted in a stirring vessel to separate aromatics from five-component hydrocarbon mixtures in the presence of lipophilic surfactants added in solvent phase. The lipophilic surfactants served to make emulsion drops smaller and enhanced the permeation rates of each permeate greatly. As the results of the use of a lipophilic surfactant, both a benzene yield of 98 % and a separation factor of 210 for benzene in reference to n-hexane were obtained at 1.5 minutes.抄録全体を表示PDF形式でダウンロード (504K) -
TAKAO TSUKADA, NOBUYUKI IMAISHI, MITSUNORI HOZAWA, KATSUHIKO FUJINAWA1987 年 20 巻 2 号 p. 146-151
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーFor silicon CZ crystal growth, the effect of inserting a radiation shield into the furnace on the temperature profile in the melt and crystal and on the shape of the melt/crystal interface was studied theoretically by use of finite element analysis based on the conduction-dominated model.
It was found that inserting a radiation shield makes the interface shape less convex to the crystal in comparison with that without the shield except for the initial stage. Also, with use of a short radiation shield there is a possibility of obtaining a higher pull rate because the temperature gradient near the interface becomes steeper than that without the shield.抄録全体を表示PDF形式でダウンロード (422K) -
Ko HIGASHITANI, TETSUYA SHIBATA, HIROYUKI KAGE, YOSHIZO MATSUNO1987 年 20 巻 2 号 p. 152-157
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーKaoline suspensions of 7.5 kg/m3 are flocculated by consecutive dosage of inorganic salt and nonionic polymer flocculant and the properties of floes are investigated. It is found that four different types of floes are possibly formed: microflocs, small and large pellet-floes, and bulky floes; and that the formation of pellet-floes depends on the polymer concentration, the stirring intensity, the stirring time and the way of stirring. Pellet-floes are found to have the following features: (a) the size is large and the shape is nearly spherical; (b) the effective density is nearly constant independently of the floe size, and so the sedimentation velocity is extremely large compared with that of microflocs; (c) the filtration resistance of the filter cake is very small; (d) the drying time of the filter cake is as short as that of microflocs; and (e) the total dehydration time of small pellet-floes is the shortest.抄録全体を表示PDF形式でダウンロード (508K) -
MASAHIRO GOTO, MICHIAKI MATSUMOTO, KAZUO KONDO, FUMIYUKI NAKASHIO1987 年 20 巻 2 号 p. 157-164
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーTo obtain more stable W/O emulsion for liquid surfactant membrane technique, a series of glutamic acid dialkyl esters and dialkyl type quaternary ammonium salts as new surfactants in place of Span 80 and polyamine were synthesized.
The adsorption equilibria between aqueous solution and organic solution containing the synthesized surfactants were elucidated and the stability of liquid surfactant membrane made of these surfactants was examined in a stirred tank.
A series of synthesized surfactants having two long alkyl chains in hydrophobic site gave more stable emulsion at a lower concentration compared with Span 80 and polyamine. Among them, glutamic acid dioleyl ester formed the most stable emulsion.抄録全体を表示PDF形式でダウンロード (594K) -
MASARU ISHIDA, KEI TAKEUCHI1987 年 20 巻 2 号 p. 164-172
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーA PSA compiler is proposed. To cover various types of combination of columns, it has new commands relevant to PSA operation such as single-column modules and coupled-column modules. It also has commands for specifying conditions, managing column allocation and displaying outputs. The user describes the system structure and operating conditions by these commands, and the compiler interprets his program and returns the data that he wants. Hence he can investigate the effect of various manipulating variables as well as various system structures promptly. Up to six components, eight columns and four kinds of adsorbents in each column can be treated. In spite of such high flexibility, this compiler is implemented in a personal computer for handiness.
Oxygen enrichment in air by a triple-column PSA is simulated for two different types of column combinations.抄録全体を表示PDF形式でダウンロード (739K) -
HARUO HIKITA, KOSAKU ISHIMI, SADATOSHI KOROYASU, TAKAHIRO NAKAI1987 年 20 巻 2 号 p. 172-176
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーEntrance region flow of falling liquid films in inclined wetted-wall columns with an overflow-type distributor was investigated theoretically and experimentally. The equations of motion based on boundary layer approximations were solved for the wave-free laminar flow of falling liquid films and a numerical solution was obtained for the dimensionless thickness of the falling liquid film, i.e., the Galileo number as a function of the liquid Reynolds number, the dimensionless distance in flow direction, and the angle of inclination of the wetted-wall plate. The liquid film thicknesses of water and aqueous sucrose solutions on inclined wetted-wall plates were measured and compared with theoretical predictions. The agreement between experimental data and theoretical predictions was fairly good in the wave-free entrance region of the falling liquid films.抄録全体を表示PDF形式でダウンロード (351K) -
ISAO KOMASAWA, HIROYUKI HOSOBA, NOBUHIRO KUROKAWA, TSUTAO OTAKE1987 年 20 巻 2 号 p. 176-182
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーThe mechanism of extraction was studied, employing several diluents with differing electron-accepting properties. For molybdenum, from 3-7 mol/l acid, the following formulation holds for all diluents and over the whole range of loading ratio of TBP.
2TBP+MoO22++2CL-=(TBP)2MoO2CL2 Kex
The extraction constants are 4.42 for n-heptane, 1.50 for xylene and 0.0114 for chloroform at low loading. They start to decrease sharply at medium and high loading. This is caused by the variation of properties of the organic solution due to the presence of the excessive amount of organic molybdenum.
For vanadium, from 2-5 mol/l acid, the following formulations hold in the range observed.
4TBP+VO2++H++3CL-=(TBP)4VO(HCL)CL2 Kex.1
4TBP+VO2+2CL-=(TBP)4VOCL2 Kex.2
The constants are Kex, 1 = 1.41 × 10-5 and Kex, 2=9.19 × 10-5 in xylene diluent. They remain constant in the range of normal operation, since the extractability of TBP for this metal is very low.抄録全体を表示PDF形式でダウンロード (539K) -
ISAO KOMASAWA, HIROYUKI HOSOBA, TSUTAO OTAKE1987 年 20 巻 2 号 p. 183-185
発行日: 1987/04/20
公開日: 2006/04/19
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HARUO HIKITA, KOSAKU ISHIMI1987 年 20 巻 2 号 p. 185-188
発行日: 1987/04/20
公開日: 2006/04/19
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CHIAKI KURODA, KOHEI OGAWA1987 年 20 巻 2 号 p. 188-190
発行日: 1987/04/20
公開日: 2006/04/19
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YOSHINORI ADACHI, HIDEZUMI SUGIE1987 年 20 巻 2 号 p. 190-192
発行日: 1987/04/20
公開日: 2006/04/19
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HIROMOTO USUI, KEI-ICHIRO MACHIBARA, YUJI SANO1987 年 20 巻 2 号 p. 192-195
発行日: 1987/04/20
公開日: 2006/04/19
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MASAAKI MURAKI, TOYOHIKO HAYAKAWA1987 年 20 巻 2 号 p. 195-198
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーPDF形式でダウンロード (294K) -
AKIYOSHI SAKODA, KUNITARO KAWAZOE, MOTOYUKI SUZUKI1987 年 20 巻 2 号 p. 199-200
発行日: 1987/04/20
公開日: 2006/04/19
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FUKUJI YAMASHITA1987 年 20 巻 2 号 p. 201-204
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーPDF形式でダウンロード (289K) -
FUKUJI YAMASHITA1987 年 20 巻 2 号 p. 204-206
発行日: 1987/04/20
公開日: 2006/04/19
ジャーナル フリーPDF形式でダウンロード (227K)
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