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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 24, Issue 6 - Dec 1986
Volume 24, Issue 5 - Oct 1986
Volume 24, Issue 4 - Aug 1986
Volume 24, Issue 3 - Jun 1986
Volume 24, Issue 2 - Apr 1986
Volume 24, Issue 1 - Feb 1986
Selecting the target year
Absorption into Aqueous Solutions I. Absorption Efficiency of
for a Sieve Tray Column
Lee, Hoo-Kun ; Cheong, Myeong-Soo ; Chun, Kwan-Sik ; Park, Hyun-Soo ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 255~255
An absorption efficiency of sieve plate column to remove nitrogen oxides with water was studied. The experimental tests were conducted at varying system conditions such as gas concentrations, flowrates as well as sieve porosities. The data collected from experimental measurements were analysed to give an account of nitrogen oxides removal efficiencies. The absorption process was supposed to accompany chemical reaction of
with water to produce
in the liquid phase. The subsequent dissociation of
resulting in the formation of
and giving off gas product NO, the latter is oxidized in the free board by
of air flow thus completing the process. It is assumed that this process repeats in the course of absorber operation. The validity of the theoretical model proposed in this study was shown by the good agreement with expermental results.
Degradation of Plant Cellulose by Cellulase and Alcohol Fermentation
Kim, Dong-Won ; Bobleter, Ortwin ; Bonn, Gunther ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 263~263
This paper deals with the enzymatic hydrolysis of different kinds of plant celluloses. The enzymatic hydrolysis of these materials by a complete cellulase from Trichoderma viride were carried out in the 0.15M acetate buffer solution at pH 5.0,
, and hydrolysis conditions were 25mg cellulase, from Trichoderma viride for 100mg plant cellulose and 72 hours. The maximum yield of glucose from these experiments was 37.4% in per cent saccharification for the indian corn stem without pretreatment for 72 hours. This enzymatic hydrolyzed solution of indian corn stem was concentrated by means of reversed osmosis until 100mg/ml glucose concentrations. And this glucose solution was fermented into ethanol, using the strain Saccharomyces carlsbergensis w34, giving yields of 95-98% of the theoretical value.
Coal Gasification in an Atmospheric Fluidized Bed
Yoon, Wang-Lai ; Lee, Heung-Woo ; Kim, Jong-Won ; Lee, Won-Kook ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 269~269
The effects of air flow rate, steam flow rate and reaction temperature on the products of coal gasification were studied in a 3-inch atmospheric fluidized bed. Produced gases were analysed by a gas-chromatography, and usable products (CO,
), coal conversion and
were correlated with the experimental variables. Concentrations of CO and
in product gas increased with reaction temperature and flow rate, but decreased with air flow rate.
increased with reaction temperature but nearly independent of steam feed rate. Coal conversion was in the range of 60% to 80% on the ash-free basis, and it increased with air flow rate and reaction temperature but independent of steam feed rate.
Flow Transition of Solids and Radial Dispersion of Liquid in Liquid-Fluidized Beds
Kang, Yong ; Kim, Sang-Done ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 277~277
Flow transition of solids and radial dispersion of liquid phase in liquid fluidized beds have been studied in a 10.2cm-ID plexiglas column. The effects of liquid velocity and particle size on bed porosity and radial dispersion coefficient have been determined. The radial dispersion coefficient increased with particle size. Whereas, the coefficient exhibited a maximum value at a liquid velocity or bed porosity. The bed porosity at which maximum radial dispersion coefficient occured coincide with the bed porosity which was derived from the continuity wave velocity at which the flow transition of solids occured. Also, the porosity value at which the coefficient exhibited a maximum value agreed well with the values at which the turbulent intensity and energy dissipation rate attained its maximum values.
A Study on the Binary Azeotrope Containing Methanol and Ethanol
Lee, Ho-Tae ; Bae, Seong-Youl ; Rhim, Jin-Nam ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 285~285
For 9 binary azeotropes containing methanol and ethanol, the azeotropic temperatures and compositions were measured within the pressure range of 400mmHg-800mmHg. The measured values were compared with those calculated by the UNIFAC equation. Also, we could get two types of empirical formula of azeotropic data with pressures and boiling points. The one is similar to Antoine equation, and the other is
, wherein all the optimum values of constants in both equations were provided for the systems illustrated.
with Ammonium Sulfate - I
Park, Yong-Seong ; Lee, Cheol-Tae ; Yu, Yeong-Hong ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 291~291
The reactions between
were investigated in order to find the possibility of
being an alternative sulfating source and of the new process of
extraction from aluminum ores. Also the study was made to search the leaching conditions of aluminum component from sulfated products. As the results,
was converted to
in the ranges of reaction temperature :
mole ratio to
and over the 99% of aluminum component was leached under the conditions of leaching temp.
, amount of
sulfated and leaching time 1h.
Adsorptive Separation Characteristics of Water from Dichlorodifluoromethane on NaA, CaA and Alumina
Lee, Young-Sub ; Park, Kun-You ; Ha, Baik-Hyon ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 299~299
The adsorption and desorption properties of water and breakthrough curves of dichlorodifluoromethane-water system were measured on zeolite NaA, CaA, and activated alumina to see the adsorption characteristics, which are effective for the separation of water from dichlorodifluoromethane-water mixture gas. The adsorption isotherms at low equilibrium pressure and the temperature programmed desorption curves of water were measured by gas chromatography. The separation of water from dichlorodifluoromethane on molecular sieving zeolite A has been found to be more effective than on activated alumina by comparing breakthrough curves which were determined from the measured isotherms. It may be ascertained that NaA is the most effective adsorbent from a standpoint of the regeneration by desorption process, although CaA adsorbs water more than NaA.
Synthesis of Ethylene Glycol from Syngas I. A Study on the Catalytic Carbonylation of Butyl Nitrite
Lee, Tae-Jin ; Han, Do-Hung ; Chae, Hee-Kwon ; Uhm, Sung-Jin ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 305~305
The synthesis of butyl oxalate by carbonylation of butyl nitrite was studied using heterogeneous catalysts such as 5 wt% pd/C, Pt/C, Ru/C and Rh/C. Selection of the catalysts was based on the strength of formed metal-oxygen bond which would determine probable product characteristics. Based on the experimental results, reaction mechanisms were proposed and effect of various experimental conditions on the conversion and selectivity was investigated.
A Study on Vapor-Liquid Equilibria for Ternary Systems (Vapor-Liquid Equilibria of Benzene(1)-n-Heptane(2)-Toluene(3) and n-Hexane(1)-Ethanol(2)-Benzene(3) Systems)
Park, Jun-Ok ; Nam, Se-Jong ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 311~311
Vapor-liquid equilibrium compositions at the normal atmospheric pressure were measured for the benzene(1)-n-heptane(2)-toluene(3) system and also n-hexane(1)-ethanol(2)-benzene(3) system with the improved Scatchard equilibrium still. These ternary vapor-liquid equilibrium compositions were compared with predicted values by the Wilson, NRTL and UNIQUAC equations. And parameters in those equations were obtained by using the binary vapor-liquid equilibrium compositions in the literature for binary pairs consisting of ternary systems. The predicted vapor compositions of ternary vapor-liquid equilibria by those equations with only binary parameters were in good agreement with accuracy in mean deviation range of 1.56-3.50%(
Prediction of Salt Effect on Ternary Liquid-Liquid Equilibria with UNIQUAC, Modified UNIQUAC Model
Choi, Joong-So ; Bae, Seong-Youl ; Rhim, Jin-Nam ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 321~321
Binodal curves for monochlorobenzene(1)-NaCl salt solution(2)-acetone(3) were measured to predict salts effect on ternary monochlorobenzene(1)-water(2)-acetone(3) without NaCl salt at
. Tie lines were determined from these binodal curves, and consistency for these data was tested by correlating with Eisen-Joffe equation. NaCl salt solutions were prepared for 5%, 10%, 15%, 20%, 25%, weight percent respectively, toward saturation concentration. It was assumed that quaternary liquid-liquid equilibria with salt were converted to ternary liquid-liquid equilibria without salt if salt were excluded. The binodal curves with NaCl salt were compared with binodal curve without NaCl salt. Experimental tie lines were correlated with UNIQUAC and modified UNIQUAC model, and parameters in each model and the calculated values of tie lines were predicted. Quaternary distribution curves were determined for each salt concentration and salts effect on ternary system were examined.
The Rhodium-Catalyzed Synthesis of Substituted Benzimidazole Derivatives from o-Phenylenediamine and Aliphatic Aldehydes
Shim, Sang-Chul ; Huh, Keun-Tae ; Oh, Dae-Hee ;
Korean Chemical Engineering Research, volume 24, issue 4, 1986, Pages 331~331
O-Phenylenediamine reacts with aliphatic aldehydes in the presence of a catalytic amount of a rhodium complex,
, in ethyl alcohol solution at
for 4 hr to give the corresponding 1-alky-and 1, 2-dialky-substituted benzimidazoles in good yields. Thus, 1-methyl-, 1-ethyl-2-methyl-, 1-propyl-2-ethyl-, 1-butyl-2-propyl-, 1-pentyl-2-butylbenzimidazole derivatives are readily obtained from o-phenylenediamine and methanal, ethanal, propanal, butanal, or pentanal respectively.