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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 20, Issue 6 - Dec 1982
Volume 20, Issue 5 - Oct 1982
Volume 20, Issue 4 - Aug 1982
Volume 20, Issue 3 - Jun 1982
Volume 20, Issue 2 - Apr 1982
Volume 20, Issue 1 - Feb 1982
Selecting the target year
Trends in Advanced Control Strategies and Their Applications to Process Control Problems
Lee, Won-Kyoo ; Lee, Gwang-Sun ;
Korean Chemical Engineering Research, volume 20, issue 2, 1982, Pages 97~97
Research in application of advanced control strategies to chemical processes has been very active recently, motivated by increases in the cost of energy and demand of higher productivity and high quality of products. Furthermore, this research activity has been spurred on by recent advances in computer hardware technology. In this review, advanced control theory, which has been developed recently, is discussed, and the status of their applications to chemical processes are also presented. Finally research directions of process control in Korea is suggested.
Modeling and Simulation of the Coupled Reaction System Comprised of Chromatophore and NAD Kinase
Park, Du-Hong ; Choe, Cha-Yong ;
Korean Chemical Engineering Research, volume 20, issue 2, 1982, Pages 113~113
Mathematical modeling and computer simulation were carried out on the coupled reaction system comprised of chromatophore and NAD kinase. An empirical kinetic model was used for the chromatophore whereas analytically derived models were employed for other catalytic components of the system. Myokinase was also included as a system component because of the difficulty in its complete separation from the chromatophore and NAD kinase. The effect of the relative ratio of the catalytic activities of the system on the overall production of NADP was studied. The time course behaviour of the biochemical species of the system was also obtained from the simulation results. Experimental data and the results of the computer simulation were compared.
Effective Mass Transfer Area and Mass Transfer Coefficient in a Packed Gas-Absorber
Lee, Won-Kook ; Kim, Young-Han ;
Korean Chemical Engineering Research, volume 20, issue 2, 1982, Pages 123~123
Chemical absorption with irreversible first order reaction was used to determine the effective interfacial area and the liquid-side mass transfer coefficient in a packed gas-absorber. Experiments were undertaken for packings of different shapes and sizes and for several kinds of liquid with various properties so that their effects on the effective interfacial area and the liquid-side mass transfer coefficient are observed. Correlations were obtained in terms of dimensionless groups through the regression analysis of the experimental results. The results of this work were compared with the other results, and a good agreement was observed.
Experimental Study on the Laser Diffraction Analysis for Development of an On-Line Particle Size Analyser
Kang, Suk-Ho ;
Korean Chemical Engineering Research, volume 20, issue 2, 1982, Pages 133~133
In order to investigate the influence of particle parameters on the evaluation of the light diffraction pattern analysis, 2-dimensional model particles were produced by photographing round particles and rectangular ones on the slide film respectively, and were experimentally analysed in the He-Ne laser diffraction system. The particle parameters were size, concentration, and shape of the particle images on the film. The results coincided with the microscopic ones within the standard deviation of 1 to 15%. The particle concentration, defined as the ratio of the particle image area to the total slide area, was suggested to be above 2% in order to eliminate errors in analysing the intensity of the diffraction pattern. For rectangular particles, the evaluated equivalent size approached only to the width of the particle.
Benzene Alkylation with Ethylene and Propylene Using Macroreticular Resin Catalysts
Kim, Myung-Soo ; Ihm, Son-Ki ;
Korean Chemical Engineering Research, volume 20, issue 2, 1982, Pages 143~143
The vapor-phase alklation of benzene with each of ethylene and propylene was carried out in a fixed-bed reactor by using two different macroreticular resin catalysts ; Amberlyst 15 and Amberlyst XN-1010. The reaction rates were shown to be correlated by the Rideal kinetics where the chemisorbed ethylene or propylene reacts with the absorbed benzene, and the activation energies of each alkylation were estimated. Water in the feed plays the role of inhibitor to the reaction, and it has been confirmed that the rate of propylation is faster than that of ethylation possibly due to the larger polarity of propylene and its corresponding easiness of permeation into the resin particle.
Performance of Fluidized-Bed Electrode Reactor Containing Copper-Coated Resin Particles
Park, Jung-Gon ; Kim, In-Ho ; Kim, Sang-Don ; Jang, Ho-Nam ;
Korean Chemical Engineering Research, volume 20, issue 2, 1982, Pages 151~151
Copper-coated macroreticular resin was investigated as a possible replacement for heavy metal particles normally used as fluidized bed electrode. In view of the energy consumption for fluidization, the use of lighter particles may result in substantial saving of the energy for pumping. A voltage just below that of hydrogen evolution in the stationary bed was selected as the reference voltage and the corresponding currents in the fluidized bed were obtained to correlate them as functions of the bed porosity, particle diameter and concentration of copper solution. With these correlations for copper-coated resin and copper particles, pressure drop data were incorporated into the cost function which compares the performances of the two systems. Using a model process that reduces copper concentration to a certain preassigned value, two particle systems were examined. As a result, it has been found that the ratio of capital cost coefficient to that of pumping cost is an important parameter in determining the advantages between the two systems. In other words, the lower the ratio becomes, the more effective the copper-coated resin system.