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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Chemical Engineering Research
Journal Basic Information
Journal DOI :
The Korean Institute of Chemical Engineers
Editor in Chief :
Volume & Issues
Volume 19, Issue 6 - Dec 1981
Volume 19, Issue 5 - Oct 1981
Volume 19, Issue 4 - Aug 1981
Volume 19, Issue 3 - Jun 1981
Volume 19, Issue 2 - Apr 1981
Volume 19, Issue 1 - Feb 1981
Selecting the target year
Absorption of Sulfur Dioxide into Slurry Containing Fine Limestone Particles
Pyo, Jae-Ho ; Chung, In-Jae ;
Korean Chemical Engineering Research, volume 19, issue 3, 1981, Pages 149~149
Chemical absorption mechanism of sulfur dioxide into the slurry containing fine limestone particles was analyzed theoretically by a two reaction planes model(three zone model). As an experimental verification of the model, enhnncement factors for the liquid film mass transfer coefficients, which were obtained by the absorption using a stirred tank absorber with a plane gas-liquid interface at
, were compared with the values predicated theoretically. It was shown that the absorption rates can be satisfactorily predicted by the proposed model. The data of absorption rate indicate that it is necessary to enhance the solid dissolution in order to improve the absorption rase. Blinding in the liquid film as well as in the bulk slurry must be considered significantly when the limestone particle is much smaller than the thickness of liquid film.
Mass Transfer from Single Drop in Solvent Extraction
Kim, Rae-Hyeon ; Choe, Chang-Gyun ;
Korean Chemical Engineering Research, volume 19, issue 3, 1981, Pages 159~159
The mass transfer of phosphoric acid from a single water drop falling in a continunous phase of n-octanol and the related drop dynamics were studied experimentally. For the drops of low acid concentration the terminal velocity agreed well with the prediction of Klee and Treybal. But its deviation was increased with the increase in acid concentration. The mass transfer coefficient in the continuous phase was well represented by
Also it was found that the dispersed phase coefficient for the drops of high concentration is favorably predicted by the model based on the penetration theory.
Gas Phase Hydrogenation of Benzene on a
Moon, Sei-Ki ; Kim, Hyung-Jin ; Nam, Tai-Hee ;
Korean Chemical Engineering Research, volume 19, issue 3, 1981, Pages 169~169
The kinetics of benzene hydrogenation over a
catalyst was studied in a differential flow reactor with temperature range from 323K, benzene partial pressures from 0.67 kPa to 5.33 kPa and hydrogen partial pressures from 24 kPa to 96 kPa. The main reaction product was cyclohexane and some cyclohexene was detected but its amount was very small to be neglected. The apparent activation energies of the hydrogenation reaction appeared 48.1kJ/mol in the temperature range of 323-383K, and unusually 62.8kJ/mol between
revealing the existence of maximum rate at certain temperature range. The temperature of the maximum rate shifted from
at 96kPa hydrogen pressures to 408 K at 24 kPa. All these phenomena are examined and the reaction mechanism also suggested.
Effective Specific Electrical Conductivities in Fluidized Bed Electrode Reactor
Chun, Hai-Soo ; Kang, Woong-Ki ;
Korean Chemical Engineering Research, volume 19, issue 3, 1981, Pages 177~177
Potential profiles of continuous electrolyte phase and dispersed particle phase were measured in a fluidized bed electrode reactor of rectangular geometry. The reactor with solid copper particles(0.5mm in diameter) was used to deposit copper from acidified aqueous solutions (0.1M and 1M
) containing 0.032M of copper. Effective specific electrical conductivities of individual phase could be calculated from the potential profiles. Results showed that the effective specific electrical conductivity of continuous electrolyte phase was inversely proportional to the 3.0 power of the bed porosity and proportional to the electrolyte specific electrical conductivity, the effective specific electrical conductivity of the dispersed particle phase was inversely proportional to the 12.0 power of the bed porosity, and the overall (or equivalent) electrical conductivity of the bed was inversely proportional to the 6.8 power of the bed porosity.
A Computer Simulation of Non-Newtonian Fluid Flow in Rheological Processes -Bingham Fluid Flow in a Calendering Process-
Rhee, Byung-Geon ; Lee, Jae-Wook ; Lee, Ki-Jun ;
Korean Chemical Engineering Research, volume 19, issue 3, 1981, Pages 187~187
Non-Newtonian fluid flow between a pair of rotating cylinders with unequal size rolls and equal speed of rolls is studied theoretically for the Bingham plastic fluid model at the isothermal condition, using the bipolar cylindrical coordinates in which the boundary conditions can be prescribed exactly. A theoretical analysis of the velocity, pressure and shear stress distribution is given by solving the continuity equation and equations of motion applying the lubrication approximation. The pressure increases monotonically with the increase of the roll radius ration and the film thickness increases with the decrease of the flow behavior index for a constant entrance coordinate. Meanwhile, the velocity profile varies with the roll radius for the nip distance of 0.01cm in the case that the roll radius is less than 0.6cm. The limiting roll size is 0.6cm and the incidence angle at the entrance point is about
degree. the power consumption per unit volumetric flow rate increases with increasing the roll speed and the roll diameter, and with decreasing the nip distance.
Determination of Vapor Liquid Equilibrium from Boiling Point Curve
Im, Jin-Nam ; Gwak, Cheol ;
Korean Chemical Engineering Research, volume 19, issue 3, 1981, Pages 199~199
Boiling points of 9 binary systems(n-hexane-n-butanol, acetone-methanol, acetone-n-propanol, methanol-n-propanol, n-hexane-n-propanol, acetone-n-hexane, methanol-n-butanol, methanol-n-hexane, acetone-n-butanol) were measured at the 760 mmHg. Using the Gautreaux & Coates equation, infinite activity coefficients of each system were calculated from the boiling poins curves of the 9 systems. Furthermore from the infinite activity coefficients Wilson parameters and isobaric vapor-liquid equilibria data were obtained. These data were compared with the experimental and reported data.
Absorption Kinetics of C.O.D. Component in Dyeing Wastewater by Zeolite Fixed Bed
Doh, Kap-Soo ; Park, Yong-Tea ;
Korean Chemical Engineering Research, volume 19, issue 3, 1981, Pages 207~207
The kinetics of fixed bed adsorption of C.O.D. component in the waste water from a dyeing mill were studied at
and 1 atm. Pressure with the Zeolite mined out of Yeoungill, Korea. Rates of liquid phase adsorption in the fixed bed packed with granular active carbon and Zeolite sand mixture were discussed for the flow rate of waste water, for the height of adsorption column, and for the mixing ratio of Zeolite and sand. In order to determine the kinetics of adsorption in the fixed bed adsorption column, material balance was applied to experimental data obtained from concentration-time profiles of the waste water passing through the bed of adsorbent.
were calculated from adsorption rate. Adsorption mechanism of granular active carbon and Zeolite were film diffusion and intratively from the Glueckauf and Hashimoto's equation. the plots between Reynolds and Sherwood number gave a straight line on log-log chart giving a slope of 1/2 and 1/3. As a mixing ratio of Zeolite and same 1:3 was found as a good transfer correlation giving
0.3765 and pore diffusivity
Phenol Removal From Waste Water by Liquid Membrane Technique
Ihm, Son-Ki ; Kim, Kyo-Seon ; Choi, Sang-June ;
Korean Chemical Engineering Research, volume 19, issue 3, 1981, Pages 217~217
Experimental investigation has been made on the removal of phenol from waste water by liquid membrane technique employing both batch and continuous operations. The effects of system variables, such as mixing intensity, phenol concenuration in the feed, concentration in the feed, concentration of sodium hydroxide, surfactant concentration, volume ration of surfactant solution to sodium hydroxide solution and volume ratio of feed to w/o emlsion, were analyzed systematically with batch opdration. For the continuous operation with a two-stage mixer-and-settler, the level of phenol concentration can be lowered by using 1wt. percent and 0.5wt. percent sodium hydroxide solution from 1,000ppm. to below 5ppm. which is the upper limit in the environmental protection act. Some advantages of liquid membrane technique over conventional removal methods such as solvent extraction and biological treatment were observed in the experiment.
Actuality of Environmental Impact Assessment
Jeong, Woo-Chull ;
Korean Chemical Engineering Research, volume 19, issue 3, 1981, Pages 227~227