巻号一覧
2 巻, 1 号
選択された号の論文の19件中1～19を表示しています
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小林 治, 市川 弥太郎1976 年 2 巻 1 号 p. 1-5
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーAn experimental study was conducted to determine the kinetics of liquid-phase oxidation of p-xylene catalyzed by cobalt acetate in acetic acid solution. Oxidation data were analyzed by an optimization method, using a digital computer. It was found that the reaction proceeds through a chain mechanism represented as follows :
φ1CH3→φ1CH2O2·→φ1CHO→φ1COOH→φ2CH2O2·→φ2CHO→φ2CO2·→φ2 COOHφ1COOH-φ2COOH-φ2CHO (inert)
Some parts of the p-toluic acid and 4-carboxybenzaldehyde were crystallized with terephthalic acid to be inert to oxidation. The rate constant and the activation energy of each step were determined. The chain initiation is the decomposition of p-xylene hydroperoxide catalyzed by cobaltous ion :
φ1CH2OOH+Co++→φ1CH2O·+Co++++OH-
The chain propagations are the oxidation of the hydrocarbons and the aldehydes by Co+++ and the reduction of the peroxy radicals and the hydroperoxide by cobaltous ion Co++, respectively. Cobalt ion is the chain carrier.抄録全体を表示PDF形式でダウンロード (689K) -
井土 忠厚, 進藤 昭次, 手島 英夫1976 年 2 巻 1 号 p. 6-11
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーTo make clear the action of an inert liquid in a stirred-tank reactor, the oxidation of carbon monoxide with cobalt oxide catalyst suspended in silicone oil was investigated. Gas holdup and the solubilities of CO, O2, N2 and CO2 in silicone oil, as well as the rate of reaction, were measured.
Mass transfer coefficients of carbon monoxide from gas bubbles to suspended catalyst particles were evaluated and the effects of mass transfer resistances on the overall rate of reaction were examined.
Comparison of the observed rate data in the slurry phase with those for gaseous reaction in a packed bed revealed that the reaction schemes were identical with each other, while the rate of reaction in the slurry phase was one seventieth to one hundredth of that in the gas phase. These results are explained by the difference in effective surface area of catalyst particles between the two phases, and are confirmed by the agreement of parameters in the rate equations obtained for slurry and gas phase reactions.抄録全体を表示PDF形式でダウンロード (805K) -
鬼頭 正和, 沢田 正志, 島田 光治, 高田 誠, 佐賀井 武, 杉山 幸男1976 年 2 巻 1 号 p. 12-15
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーGas holdup and its dependence on process variables such as superficial gas velocity, properties of liquid, packing size and density, number of packings, tower diameter and static packing height have been investigated.
The gas holdup is dependent on the superficial gas velocity and surface tension of liquid, but is independent of other process variables. A dimensionless correlation is obtained for the gas holdup.抄録全体を表示PDF形式でダウンロード (427K) -
鬼頭 正和, 島田 光治, 飯島 良, 佐賀井 武, 高田 誠, 杉山 幸男1976 年 2 巻 1 号 p. 16-20
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーThe rate of absorption with chemical reaction, the interfacial area and their dependence on process variables have been investigated.
The effective interfacial area per unit bed volume increases with increasing gas velocity up to 200 cm/sec (gas holdup-0.6), but decreases at a high gas velocity. The effective interfacial area seems to be independent of process variables such as free opening of the supporting grid, static packing height, column diameter, solid holdup and packing size and density.抄録全体を表示PDF形式でダウンロード (742K) -
鬼頭 正和, 香山 有樹, 佐賀井 武, 杉山 幸男1976 年 2 巻 1 号 p. 21-24
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーEffects of the characteristics of packings and supporting grids, gas holdups and liquid flow rates on the minimum fluidization velocity for a mobile bed have been investigated. The minimum fluidization velocity, Umf, is determined by the relation between the pressure drop across the bed and the flow rate of gas, and is compared with the minimum fluidization velocity, UmfUL=0, for a conventional solid-gas fluidization system. A correlation of Umf with UmfUL=0, the flow rate of liquid and the characteristics of supporting grids is presented.抄録全体を表示PDF形式でダウンロード (460K) -
前田 昌信, 猪飼 茂1976 年 2 巻 1 号 p. 25-30
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーIn this work it is attempted to investigate the characteristics of branching of solid particles of 0.0253 mm in diameter, which are transported by air flow in the usual T, Y and + type branches. The mixing ratio of solid to air, the transport air velocity, the shape of branches and the particle size are investigated. The results obtained show that the flow of solid particles in Y and T type branches is so affected by shape of branches and particle size that the flow distribution can hardly be controled by air flow, but that in the + type branch it is proportional to the transport air flow ratio, by blowing additional air into the branch point from the tube opposite the main tube.抄録全体を表示PDF形式でダウンロード (6424K) -
牧野 和孝, 井伊谷 鋼一, 柴本 正美, 外山 茂樹, 伊ヶ崎 文和1976 年 2 巻 1 号 p. 31-37
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーA new method of dislodging dust layer from a flat surface by a non-uniform electric field is studied experimentally.
It is effective for industrial dusts such as sintering furnace dust and ABS resin powder, especially when a corona discharge is applied. The optimum electrode diameter depends on the distance between dust layer and line electrode surface. The applied frequency should be less than commercial frequency to avoid decreasing performance.抄録全体を表示PDF形式でダウンロード (1063K) -
金川 昭, 高橋 武士1976 年 2 巻 1 号 p. 38-41
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーThe response characteristics of light-scattering aerosol photometers used for measurement of particle weight concentration were measured for two test aerosols of polystyrene latex and dioctyl phthalate, and were compared with the theoretical results calculated from Mie theory. The plot of the photocurrent of the photometer and the aerosol particle weight concentration had shown excellent linearity for two photometers, 60° sideways scattering type and forward scattering type. It was shown that the response expressed as a value of the photocurrent divided by the particle weight concentration varied widely with particle size, and these experimental results on the particle-size dependency of the response could be well explained by theoretical response calculations using Mie formulae for light scattering by spherical aerosol particles.抄録全体を表示PDF形式でダウンロード (504K) -
西川 正史, 乾 恵太, 米沢 吉一, 永田 進治1976 年 2 巻 1 号 p. 42-46
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーAs turbulence of liquid is violent and solid particles circulate with repeated positive or negative acceleration in a liquid-phase spouted vessel, the relative or slip velocity between solid particles and liquid becomes large and mass transfer is promoted. It was experimentally confirmed in this work that the mass transfer coefficient from solid particles in the liquid-phase spouted vessel was much larger than that from a single sphere in a flow or particles in a liquid-phase fluidized bed or in a fixed bed. It was also found that the power required for the spouted vessel was only one-tenth or less of that required for the mixing vessel or the liquid-phase fluidized bed to get the same mass transfer coefficient.抄録全体を表示PDF形式でダウンロード (869K) -
大宮 衛, 神沢 淳1976 年 2 巻 1 号 p. 47-52
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーTo investigate the influence of joule heating on plasma heat transfer, heat input rates to a water-cooled copper pipe immersed in an atmospheric pressure argon plasma flow were measured, applying potentials ranging from -40 V to +10 V. The conclusions were that joule heating generated around the pipe is absorbed fully into the pipe when the potential is negative, and that a little of the joule heating is absorbed when it is positive. The explanation of these phenomena is as follows. At the negative potential, ion sheath shields are so complete that a potential gradient near the surface is very great, while at the positive one, a potential gradient is not confined near the surface and joule heating is generated not only near the surface but over all the region of plasma flow. These facts were found by measuring plasma potentials.抄録全体を表示PDF形式でダウンロード (836K) -
橋本 健治, 室山 勝彦, 藤吉 建二, 永田 進治1976 年 2 巻 1 号 p. 53-59
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーRadial effective thermal conductivities were measured in gas-liquid cocurrent flow through packed beds, and were correlated in terms of the following equation :
keγ= (ke0) gL+ (ket) g+ (ket) L
where (ke0) gL is the effective thermal conductivity of the packed bed with motionless gas and liquid, (ket) g and (ket) L are the terms due to the radial mixing of gas and liquid flow, respectively.
(ket) g increases with the gas flow rate. In the trickling and pulsing flow regions, (ket) L is larger than the correlated value in single-phase flow. In the bubbling flow region, it is equal that in single-phase flow.
Péclet number for radial mass transfer, PeM, is about 20 % larger than that for radial heat transfer, PeH.
A correlation of (ket) L is presented as a function of a modified liquid Reynolds number, (deGL/εαLμL) as follows :
(ket) L/εαLkLPγL·μL/μ0=1/ {1.90/ (deGL/εαLμL) (μL/μ0) +0.0264} +0.197 (deGL/εαLμL) (μL/μ0)抄録全体を表示PDF形式でダウンロード (1327K) -
河村 祐治, 品川 秀夫, 木山 洋実1976 年 2 巻 1 号 p. 60-64
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーExperimental studies were made of vacuum puff drying of the ethanol-ethyl acetate azeotrope solution of lac in order to clarify quantitatively the drying characteristics.
Drying for 40 minutes ensured that an easily soluble and fragile product of low liquid content was obtained.
Experimental results reveal that drying rates are dependent on liquid content, thickness and setting temperature of sample prior to evacuation, and in the early stage of drying are controlled to heat transfer.抄録全体を表示PDF形式でダウンロード (2497K) -
榊原 三樹男, 遠藤 一夫1976 年 2 巻 1 号 p. 65-70
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーThe equation describing the turbulent Graetz problem (heat transfer to a fluid between parallel plates) is solved numerically for first ten eigenvalues and eigenfunctions in the range of both 104≤Re≤5×105 and 0.01≤Pr ≤10.
In the calculation, we used the new correlations of turbulent fluid velocity, eddy diffusivity and turbulent Prandtl number from a reconsideration of the available experimental work. Heat transfer rates are predicted for both the entrance and fully developed regions of parallel plates. The effect of the uniform wall temperature boundary condition on heat transfer rate is discussed. Calculations of Nusselt numbers in the entrance region are in good agreement with experimental data.抄録全体を表示PDF形式でダウンロード (781K) -
諸岡 成治, 西中 誠幸, 加藤 康夫1976 年 2 巻 1 号 p. 71-76
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーThe residence time distribution curves of both non-adsorptive gas (helium) and adsorptive gas (carbon dioxide, Freon 12 and Freon 22) in 12 and 19 cm I.D. free and eight-step fluid beds (FCC catalyst-air system) are measured by impulse response technique.
The overall capacity coefficient of mass transfer kobab between bubble phase and emulsion phase are calculated from these curves by applying a two-phase model in which physical gas adsorption equilibrium on solid particles is taken into account.
It is found that the flow of gas approaches plug flow by dividing the fluid bed with baffles, and the values of kobab is dependent on the adsorption partition coefficient m and the bubble volume fraction εb. The following correlation is obtained :
kobab/εb= (15m 1.8 + 229) / (m 1.8 + 191)抄録全体を表示PDF形式でダウンロード (782K) -
遠藤 一夫, 平野 晴望1976 年 2 巻 1 号 p. 77-80
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーAn experimental study was made of the maximum velocity of the jet-like flow along the axis of vibration induced by a sinusoidally vibrating sphere in a viscous fluid.
The experimental correlation obtained is
υη/ν a2ω/ν (=streaming Reynolds number)
where υ is the maximum velocity of the jet-like flow, η is the thickness of the inner vortex, and a, ω and ν are respectively the amplitude of vibrating sphere, the angular velocity, and kinematic viscosity of viscous fluid.抄録全体を表示PDF形式でダウンロード (2053K) -
中池 康夫, 高橋 信次, 只木 〓力1976 年 2 巻 1 号 p. 81-85
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーTo analyze interfacial turbulence generated by Marangoni effect, numerical analysis of the two-dimensional diffusion and Navier-Stokes equations is performed.
Physical constants used in this analysis are the same (Schmidt numbers of the first and second phases are 6000 and 100 respectively, and Marangoni number is 2000) as in the previous mass transfer experiment in a two-dimensional cell.
The following matters are calculated :
(1) flow pattern and concentration profiles in both phases
(2) relation between degree of saturation and the time elapsed
(3) effect of aspect ratio upon degree of saturation
These calculated results agree with previous experimental results qualitatively.抄録全体を表示PDF形式でダウンロード (766K) -
寺本 正明, 池田 正人, 寺西 博1976 年 2 巻 1 号 p. 86-90
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーAbsorption rates of dilute NO into mixed aqueous solutions of KMnO4 and NaOH were measured using a semibatch agitated vessel with a flat free gas-liquid interface, and the absorption mechanism of this system was investigated. The reaction involved was represented by
NO +MnO4- +2OH- =NO2- + MnO42- +H2O
and was found to be first-order with respect to both NO and MnO4-. The reaction-rate constant k at [NaOH]=-1 g-mol/l was expressed by
k=1.78 × 1012 exp (-7, 581/RT)
and increased with [NaOH]. However, the absorption rate was slightly lowered with an increase in [NaOH] because the solubility and the liquid-phase diffusivity of NO decreased with increasing [NaOH]. These results suggest that absorption rates of dilute NO in flue gases into aqueous solutions of KMnO4 are not influenced by liquid-phase mass transfer coefficient and that absorption proceeds in the region of pseudo-first order fast reaction.抄録全体を表示PDF形式でダウンロード (835K) -
照屋 輝一, 盛 隆志, 中森 一誠1976 年 2 巻 1 号 p. 91-95
発行日: 1976/01/10
公開日: 2010/02/12
ジャーナル フリーA method is proposed for estimating the mean activity coefficients of strong electrolyte 12, γ±12, in systems containing 1, 2, 3, … (odd : cation, even : anion) by the following relation :
logγ±12=logγ±12°+Σai (12) mi (i≠1, 2)
where γ±12 is the mean activity coefficient of electrolyte 12 in the pure solution of 12 at the same ionic strength of the mixture; ai (12) is the parameter assigned to the three-ion system of ion 1, 2 and i but any dependence of ai (12) on ionic strength is ignored; mi is the molality of ion i.
In this paper this method is applied for correlation of the mean activity coefficients of hydrochloric acid in hydrochloric acid solutions containing one metal chloride (i.e., three-ion systems), and aM (HCl) is obtained for several metal ions (Mn+). The mean activity coefficients of hydrochloric acid in hydrochloric acid solutions containing more than one metal chloride (i.e., four or five-ion systems) are obtained by E.M.F. measurements, and are examined by the above relation using values of aM (HCl) determined in the correlation of the three-ion systems. The deviations between the experimental and the estimated mean activity coefficients are within about 5% for all the systems.抄録全体を表示PDF形式でダウンロード (732K) -
西中 誠幸, 諸岡 成治, 加藤 康夫, 松浦 明徳, 明畠 高司, 白井 隆, 高津 学, 近藤 和生, 中塩 文行, 国眼 孝雄, 平原 ...1976 年 2 巻 1 号 p. 96-108
発行日: 1976/01/10
公開日: 2009/10/21
ジャーナル フリーPDF形式でダウンロード (2217K)
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