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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 :
KIM JAE JEONG
Volume & Issues
Volume 47, Issue 6 - Dec 2009
Volume 47, Issue 5 - Oct 2009
Volume 47, Issue 4 - Aug 2009
Volume 47, Issue 3 - Jun 2009
Volume 47, Issue 2 - Apr 2009
Volume 47, Issue 1 - Feb 2009
Selecting the target year
Recycle of Carbon Dioxide Using Dry Reforming of Methane
Kim, Jeong-Mook ; Ryu, Jun-Hyung ; Lee, In-Beum ; Lee, Jae-Sung ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 267~274
Considerable attention has been given to developing methodologies to reduce the emission of carbon dioxide from industry to meet strengthened environmental regulations. In this article, recent research trends on dry reforming of methane as an alternative method to reduce
emission from large scale industrial processes are addressed. To efficiently provide the energy needed in this strong endothermic reaction without additional
emission, it seems to be desirable to adopt autothermal reaction mode. The produced synthesis gas could be used as a reducing gas, or a feedstock for synthesis of chemicals and fuels.
Catalytic Performance of V-KIT-6 for the Oxidation of Styrene
Kim, Sang-Yun ; Jermy, Balasamy R. ; Bineesh, Kanattukara V. ; Lim, Dong-Ok ; Kim, Kyung-Hoon ; Park, Dae-Won ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 275~280
The direct incorporation of vanadium into the three-dimensional(3-D) cubic Ia3d mesostructure designated as V-KIT-6 was carried out hydrothermally using a Pluronic P123 and n-butanol as the structure-directing mixture, tetraethylorthosilicate(TEOS) as the silica source and
as the vanadium source. The obtained V-KIT-6 showed a very high specific surface area ~1,000
/g with tunable pore diameters in narrow distribution of sizes ~6.0 nm. The coordination and nature of V sites in V-KIT-6 are characterized by
-spin-echo NMR analysis. The calcined V-KIT-6 materials showed excellent catalytic activity in the direct oxidation of styrene using tert-butyl hydroperoxide(TBHP) as an oxidant.
Extraction of Athabasca Oil Sand with Sub- and Supercritical Water
Park, Jung-Hoon ; Son, Sou-Hwan ; Baek, Il-Hyun ; Nam, Sung-Chan ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 281~286
Bitumen extraction and sulfur removal from Athabasca oil sand were conducted using water in sub- and supercritical condition. Bitumen yield in micro reactor was investigated in the pressure range of 15~30 MPa, the temperature of 360 and
and water density 0.074~0.61 g/
for 0~120 min. Bitumen yield increased with reaction pressure irrespective of temperature and dramatically increased in especially supercritical region due to hydrogen formed from water gas shift reaction. Total amount of gas product decreased with reaction pressure but the portion of sulfur and hydrogen increased a little with increasing pressure to 25 and 30 MPa. It is seen that supercritical condition was favourable to the hydrogen formation and sulfur removal. Bitumen yield and sulfur removal from original oil sand reached a maximum 22% and 40% respectively in supercritical condition(the reaction time of 60 min at
and 25 or 30 MPa).
Wet Oxidation of Phenol with Homogeneous Catalysts
Suh, Il-Soon ; Ryu, Sung-Hun ; Yoon, Wang-Lai ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 292~302
The wet oxidation of phenol has been investigated at temperatures from 150 to
and oxygen partial pressures from 25.8 to 75.0 bar with initial pH of 1.0 to 12.0 and initial phenol concentration of 10 g/l. Chemical Oxygen Demand COD has bee measured to estimate the oxidation rate. Reaction intermediates have been identified and their concentration profiles have been determined using liquid chromatography. The destruction rate of phenol have shown the first-order kinetics with respect to phenol and the changes in COD during wet oxidation have been described well with the lumped model. The impact of various homogeneous catalysts, such as
ions, on the destruction rate of phenol and COD has also been studied. The homogeneous catalyst of
has been found to be the most effective for the destruction of phenol and COD during wet oxidations. The destruction rate of formic acid formed during wet oxidations of phenol have increased as increasing temperature and
concentration. The final concentrations of acetic acid which has been formed during wet oxidations and difficult to oxidize have increased with reaction temperature and with decrease in the catalyst load.
The Effects of Zeolite-Type Catalysts on the Pyrolysis Reaction of Raw Material Resin to Produce Fuel-Oil from Waste Vinyl
Bak, Young-Cheol ; Choi, Joo-Hong ; Cho, Tae-Ho ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 303~309
The effects of zeolite type catalysts addition on the thermal decomposition of low density polyethylene(LDPE) and ethylene vinyl acetate(EVA) resin have been studied in a thermal analyzer(TGA, DSC) and a small batch reactor. The zeolite type catalysts tested were natural zeolite, FCC catalyst, used FCC catalyst, and catalyst A. As the results of TGA experiments, addition of antifogging-agent decreased the pyrolysis point to 250
, but addition of longevity-agent and clay reduced the pyrolysis rate in EVA resin. Addition of the zeolite type catalysts in the LDPE resin increased the pyrolysis rate in the order of catalyst A > used FCC catalyst > natural zeolite > LDPE resin. Addition of the zeolite type catalysts in the EVA resin increased the pyrolysis rate in the order of used FCC catalyst > natural zeolite > catalyst A > EVA resin. In the DSC experiments for LDPE resin, addition of zeolite type catalysts decreased the melting point and the heat of pyrolysis reaction in the order of catalyst A > used FCC catalyst > natural zeolite> LDPE resin. In the batch system experiments, the mixing of natural zeolite enhanced the yield of liquid fuel oil.
Oxygen Permeation Properties of
Son, Sou-Hwan ; Kim, Jong-Pyo ; Park, Jung-Hoon ; Lee, Yong-Taek ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 310~315
Perovskite-type ceramic powder,
, have been synthesized successfully by the citrate method. As a result of TGA for precursor, metal-citrate complex in precursor was decomposed in the temperature range of 150~
. XRD analysis showed the single perovskite structure was observed over
without impurities. Typical dense membrane with 1.6 mm thickness has been prepared using as-prepared powder by pressing unilaterally and sintering at
. The electrical conductivity of
membrane increased with increasing temperature at atmosphere of air and then decreased over
due to oxygen loss from the crystal lattice. The oxygen flux of
membrane in the range of 700 to
increased with the increasing temperature from 0.045 to 0.415 ml/
.min. The activation energy for oxygen permeation was calculated to be 89.17 kJ/mol.
The Physical Properties of Polycarbonate Films Coated with Hard and Color Coating Materials
Kim, Hyun-Joon ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 316~320
UV curable hard and color coatings were formed on polycarbonate(PC) films. The coating materials were composed of a commercially available end-capped polyester(EB830), diacrylate monomer(HDDA), silicon acrylate, photoinitiator, and organic dye as a coloring agent. The surface properties of coating films were evaluated, and the influences of the compositions of coating materials were investigated. The coating films showed high transmission and good adhesion between coating layer and PC substrate. And the coating films exhibited higher hardness than bare PC film. The coating films with various colors were obtained by wet process, and the clear and color window lenses for mobile phone were prepared successfully.
Development of On-Line Measurement System for Adsorption Process
Kim, Byoung-Chul ; Lee, Ki-Sung ; Yamamoto, Takuji ; Kim, Young-Han ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 321~326
A simple measuring device is proposed, and its performance is examined in an adsorption process separating a gas mixture. The sensor is made of a quartz crystal resonator and solid adsorbent to detect the target component. Micro-particle carbon cryogel(MCC) is utilized as the adsorbent, and the gas mixture of air and i-butane are separated in a column containing bamboo activated carbon. Two devices are placed at the inlet and outlet of the column. The measurements are compared with those of GC outcome to prove the measurements are effective. The experimentally proved system is simple and capable to be implemented in an in-line system with on-line measurement.
Dynamic Behavior of a Modified Thermally Coupled Distillation Column
Hwang, Kyu-Suk ; Sung, Ick-Gi ; Kim, Young-Han ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 327~331
A thermally coupled distillation system is constructed using two columns used in a conventional two column system, and its operability is examined by investigating the dynamic behavior. For the control of three product specifications, the step response test is performed and a 3
3 control structure using flow rates of overhead and side products and vapor boilup is suggested. The performance of the proposed control system indicates that the specification control of bottom product is the most difficult but the operation of the proposed system is available.
Effects of Nano Silica and Siloxane on Properties of Epoxy Composites for Adhesion of Micro Electronic Device
Lee, Dong-Hyun ; Kim, Dae-Heum ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 332~336
When NCAs(non-conductive adhesives) are used for adhesion of micro-electronic devices, they often show problems such as delamination and cracking, due to the differences of CTE(coefficients of thermal expansion) between NCAs and substrates. Additions of inorganic particles or flexibilizers have been performed to solve those problems. The effects of silica addition on thermal/mechanical properties of amino modified siloxane(AMS)/silica/epoxy-nanocomposites were examined. The silica was treated by 3-glycidoxypropyltrimethoxysilane(GPTMS) for better compatibility between silica and epoxy matrix. AMS/silica/epoxy-nanocomposites filled with various amounts of AMS(1 and 3 phr) and various amounts of silica(3, 5 and 7 phr) were prepared. And Tg, moduli and CTE of nanocomposites were analyzed. Tg of AMS/Aerosil(non-modified silica)/epoxy-nanocomposites decreased from 125 to
with increasing Aerosil contents and moduli increased from 2,225 to 2,523 MPa with increasing Aerosil contents. Tg of AMS/M-silica (modified silica)/epoxy-nanocomposites decreased from 124 to
with increasing M-silica contents and moduli increased from 1,981 to 2,743 MPa with increasing M-silica contents. CTE of AMS/Aerosil/epoxy-nanocomposites and AMS/M-silica/epoxy-nanocomposites showed decreasing tendency regardless of the surface treatments.
A Study on Two-interconnected Fluidized Beds System for Selective Solid Circulation
Ryu, Ho-Jung ; Jang, Myoung-Su ; Kim, Hong-Ki ; Lee, Dong-Kyu ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 337~343
To apply to novel two-interconnected fluidized beds system for selective solid circulation, a solid separator and a solid circulation system were developed. The solid separation rate increased as the gas velocity through the solid injection nozzle, solid height, and diameter of solid injection nozzle increased. However, the effect of the fluidization velocity was negligible. Coarse(212~300
m) and fine(63~106
m) particles were separated using the solid separator and the solid separation rate was ranged from 66 to 453 g/min. The solid circulation rate increased as the gas velocity through the solid injection nozzle, solid height, and the number of solid intake holes increased. However, the effect of the fluidization velocity was negligible. Fine particle was circulated using the solid circulation system and the solid circulation rate was ranged from 65 to 390 g/min. We also proposed two interconnenced fluidized beds system for selective solid circulation equipped with the developed solid separator and the solid circulation system. Long-term operation of continuous solid circulation up to 20 hours has been performed to check feasibility of stable operation. The pressure drop profiles in two beds and the solid separation rate were maintained steadily, and therefore, we could conclude that solid circulation was smooth and stable.
Carbonation-Regeneration Characteristics of Potassium-Based Dry Sorbents According to Water Vapor Contents of Inlet Gas and Regeneration Temperature in the Cycle Experiments of Bubbling Fluidized-Bed Reactor
Park, Keun-Woo ; Park, Yeong-Seong ; Park, Young-Cheol ; Jo, Sung-Ho ; Yi, Chang-Keun ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 349~354
In this study, a bubbling fluidized-bed reactor was used to study
capture from flue gas using a potassium-based dry sorbent. A dry sorbent, manufactured by the Korea Electric Power Research Institute, consists of 35% of
absorption and 65% of supporters for mechanical strength.
O, a reactant of the carbonation reaction, was supplied in the reactor as a form of saturated water vapor at a given temperature. The experiment of the regeneration reaction was performed by raising up to a given temperature using
as a fluidization gas. It was indicated that sorption capacity and regenerability of dry sorbents showed high-efficiency at 1.97 mol
, respectively. The regenerated sorbent samples were analyzed by TGA to confirm the extent of the reaction. When the regeneration temperature was
, the regenerability of dry sorbents was about 60%, which was capable of applying those sorbents to a two-interconnected fluidized-bed reactor system with continuous solid circulation. The results obtained in this study can be used as basic data for designing and operating a large scale
capture process with two fluidized-bed reactors.
Effects of Operating Variables on Solid Separation Rate in Two-interconnected Fluidized Beds System for Selective Solid Circulation
Ryu, Ho-Jung ; Jin, Gyoung-Tae ; Bae, Dal-Hee ; Kim, Hong-Ki ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 355~361
Effects of operating variables on solid separation rate in two-interconnected fluidized beds system for selective solid circulation have been investigated. Coarse(212~300 or 425~600
m) and fine(63~106
m) particles were separated using the solid separator and the solid separation rate was ranged from 66 to 987 g/min. The solid separation rate increased as the gas velocity through the solid injection nozzle, solid height, diameter of solid injection nozzle, particle size of coarse particles, aperture of the solid separator, and weight fraction of fines in the solid mixture increased. However, the effect of the fluidization velocity was negligible.
Measurement of Adsorption Characteristic Using a Quartz Crystal Resonator
Kim, Byoung-Chul ; Sung, Ick-Gi ; Yamamoto, Takuji ; Kim, Young-Han ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 368~372
A technique to measure the adsorption characteristic of surface area and pore size distribution is proposed and its performance is examined. While the existing equipment utilizes liquid nitrogen, the proposed uses carbon dioxide at the room temperature leading to the small measuring device with easy operation and short measurement time. The performance of the device has been examined with micro-particle carbon cryogel and bamboo activated carbon. The results from the proposed device compared with those of the adsorption apparatus indicate that the measurement of meso-porous material is comparable but micro-porous material gives some error.
Sorption Analysis of Carbon Dioxide onto Cesium Carbonate
Son, Young-Sik ; Kim, Seong-Soo ; park, Sang-Wook ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 373~379
Cesium carbonate was used as an adsorbent to capture carbon dioxide from gaseous stream of carbon dioxide, nitrogen, and moisture in a fixed-bed to obtain the breakthrough data of
. The deactivation model in the non-catalytic heterogeneous reaction systems is used to analyze the sorption kinetics among carbon dioxide, carbonate, and moisture using the experimental breakthrough data. The experimental breakthrough data are fitted very well to the deactivation model than the adsorption isotherm models in the literature.
Absorption of Carbon Dioxide into Polar Solvents of 2-Amino-2-Methyl-1-Propanol
Son, Young-Sik ; Heo, Nam-Hwan ; Lee, Sung-Su ; Park, Sang-Wook ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 380~385
The absorption rate of carbon dioxide with 2-amino-2-methyl-1-propanol(AMP) was measured in such non-aqueous solvents as methanol, ethanol, n-propanol, n-butanol, ethylene glycol, propylene glycol, and propylene carbonate, and in water at 298 K and 101.3 kPa using a semi-batch stirred tank with a plane gas-liquid interface. The overall reaction rate constant, obtained under the condition of fast reaction regime, from the measured rate of absorption was used to get the elementary reaction rate constants in complicated reactions represented by reaction mechanism of carbamate formation and the order of overall reaction of
with amine. The correlation between the elementary reaction rate constant and the solubility parameter of the solvent was also presented.
Impacts of Urban Green Spaces on Air Quality
Joo, Hyun-Soo ; Kim, Seog-Cheol ;
Korean Chemical Engineering Research, volume 47, issue 3, 2009, Pages 386~393
This study was to find out the quantitative relation between urban treed area(neighborhood parks) and the atmosphere environment in real condition, focusing the gas-phase non-reacting air pollutants(SOx and NOx) decreasing function of trees in urban area. It also developed a quantitative analysis method for evaluation of the atmosphere influence in the type of treed areas. We set up the Pagoda Park in Seoul and its neighbourhood as a modelling area to analyse air quality impacts by urban neighbourhood park trees. From the modelling result of the Pagoda Park case study, it is concluded that urban neighbourhood park has an important meaning to suppress construction of emission sources which drive the urban polluted air quality worse, even though park’s trees have relatively small air purifying function. Especially in the urban area severely contaminated by air pollutants, the first considered air quality management policy is conservation of green spaces in neighborhood park.