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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 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
Recent Research Trends of Catalytic Conversion of
to High-value Chemicals
Song, Ki-Hun ; Ryu, Jun-hyung ; Chung, Jong-Sik ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 519~530
Reducing the emission of carbon dioxide, which is the main contributor to the green house effect, is becoming a global hot issue. Great attention has been thus given to utilization of carbon dioxide rather than just capturing and isolating it because it could convert carbon dioxide to high-value chemicals. In this paper, recent research trends are investigated on the catalytic conversion of carbon dioxide to syngas in the context of
, dry-reforming, trireforming, and the electro-catalytic conversion of carbon dioxide through SOFC(Solid Oxide Fuel Cell) system. Research trends for utilizing syngas to high-value-added useful products, mainly fuel such as DME(Dimethyl Ether) are also discussed.
Recent Research Trends of Chemical absorption in CCS(Carbon dioxide Capture and Storage) and the role of Process Systems Engineering
Kim, Young-Hwang ; Ryu, Jun-Hyung ; Lee, In-Beum ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 531~537
Climate changes including environmental disasters after reckless industrialization have been globally witnessed. Considerable attention on the imminent need for developing CCS(Carbon dioxide Capture and Storage) methodologies to minimize the emission thus has been given. Chemical absorption is particularly regarded important because of its commercial availability and applicability to large scale plants. This paper addresses recent trends of chemical absorption technologies and the need for the further research on the topic from the perspective of process systems engineering(PSE).
Atomic Force Microscopy(AFM) based Single Cell Manipulation and High Efficient Gene Delivery Technology
Han, Sung-Woong ; Nakamura, Chikashi ; Miyake, Jun ; Kim, Woo-Sik ; Kim, Jong-Min ; Chang, Sang-Mok ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 538~545
The principle and application of a scanning probe microscopy(SPM) are reviewed briefly, and a low-invasive single cell manipulation and a gene delivery technique using an etched atomic force microscopy(AFM) probe tip, which we call a nanoneedle, are explained in detail. The nanoneedle insertion into a cell can be judged by a sudden drop of force in a force-distance curve. The probabilities of nanoneedle insertion into cells were 80~90%, which were higher than those of typical microinjection capillaries. When the diameter of the nanoneedle was smaller than 400 nm, the nanoneedle insertion into a cell over 1 hour had almost no influence on the cell viability. A highly efficient gene delivery and a high ratio of expressed gene per delivered DNA compared the conventional major nonviral gene delivery methods could be achieved using the gene modified nanoneedle.
Characteristics of Wheat Germ Oil during Enzymatic Ethanolysis in Supercritical Carbon Dioxide
Back, Sung-Sin ; Kwon, Kyung-Tae ; Jung, Go-Woon ; Ahn, Hyaung-Min ; Sim, Jeong-Eun ; Kang, Hee-Moon ; Chun, Byung-Soo ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 546~552
Enzymatic ethanolysis of wheat germ oil with immobilized lipase was investigated for enhancing the function of wheat germ oil. Ethanolysis reactions were carried out in two different systems; non-pressurized and pressurized system. In non-pressurized system, the enzymatic ethanolysis was carried out in an erlenmeyer flask(25 ml) containing a mixture of wheat germ oil and 99.90% ethanol using 1~5 wt% immobilized lipase as Lipozyme TL-IM and Lipozyme RM-IM and the reaction mixtures were incubated at 40~70
with 120 rpm shaking. In pressurized system, the enzymatic ethanolysis was carried out at various condition; immobilized lipase concentration(2 wt%), reaction time(24 h), reaction temperature(40~
) and reaction pressure(75, 100, 150, 200 bars). The samples obtained from each fraction were analyzed by HPLC for analysing contents of monoglyceride, diglyceride, and triglyceride. The conversion of wheat germ oil relied on the reaction temperature and the concentration of immobilized lipase. The optimum condition of enzymatic ethanolysis in non-pressurized and pressurized systems was at
and 100 bar.
Cosmetic Effect of Angelica gigas Nakai Root Extracts
Park, Suk-Kyoung ; Hong, Seul-Ki ; Kim, Hee-Jin ; Kim, Bo-Young ; Kim, Ta-Gon ; Kang, Jae-Seon ; Kim, Dong-Uk ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 553~557
Root extracts of Angelica gigas Nakai were tested to see the possibility for functional cosmetic agents. From ethanol extraction method, 97% of decursin and decursinol angelate was obtained, and concentration ratio of decursin to decursinol angelate was about 3:2. To test possibility as a functional cosmetic agent, DPPH free radical scavenging assay, UVA/B absorption, tyrosinase inhibition assay, melanogenesis inhibition assay, elastase inhibition assay and MTT assay were done. Root extracts of Angelica gigas Nakai showed 45.2
3.9% tyrosinase inhibition of tyrosine, and 24.2
12.0% melanin inhibition at 15
/ml extract concentration, so that it indicated good whitening effect. DPPH free radical scavenging activity was 40.9
9.1% at 240
/ml concentration, which is relatively good. Anti-wrinkle effect was poor such that it was 12.7
6.8% at 100
/ml. UVA/B absorption was also negligible. From the research, root extracts of Angelica gigas Nakai showed good potential as a whitening agent.
Optical Communication and Sensing Modules for Plastic Optical Fibers
Park, Byung-Wook ; Yoon, Do-Young ; Kim, Dong-Shik ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 558~564
POF(Polymer optical fiber) offers advantages of lighter, inexpensive, and easier to use over GOF(glass optical fiber). Its higher transmission loss and low bandwidth, however, make it suitable only for short distance networking such as LAN. The polymer materials and its synthesis technology of low transmission loss and the broader application for flexible POF are the two of many critical areas to be investigated more. In the current study, low-noise POF modules are developed and optimized with a low noise amplifier and low cost LED of 650 nm. In order to demonstrate the dynamic characteristics of the POF module for optical communication and sensing, we have built an image transfer module, optical transmission speed measurement module, optical transceiver for RS-232, and sound-transfer module, and the signal characteristics of them are evaluated. It is found that the module can be readily used for a quick and simple measurement of optical transfer speed. With help of analog amplifier, LED, and PD, sound and image transfers through a maximum 60 m optical waveguide have been confirmed. Real-time data transfer was also demonstrated in PID control, which is thought to be valuable to industrial plant design and control.
Calculation of the Hydrocarbon and Water Dew points of Natural Gas
Ha, Young-Cheol ; Lee, Seong-Min ; Her, Jae-Young ; Lee, Kang-Jin ; Lee, Seun-Jun ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 565~571
This study was conducted to evaluate hydrocarbon and water dew points of natural gas. For this purpose, algorithm of suppressing divergence was devised to evaluate hydrocarbon dew point up to near critical point and algorithm for finding water dew points lower than that of hydrocarbon, which cannot be calculated by commercial dew point program, was developed. The evaluated values were compared to commercial program and ISO reference values, and the results showed that deviations were zero.
Flame Propagation Characteristics Through Suspended Combustible Particles in a Full-Scaled Duct
Han, Ou-Sup ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 572~579
This study is to investigate experimentally the flame structure and propagation mechanism in dust explosions and to provide the fundamental knowledge. Upward propagating laminar dust flames in a vertical duct of 1.8 m height and 0.15 m square cross-section are observed and flame front is visualized using by a high-speed video camera. Also, the thicknesses of preheated and reaction zone have been determined by a schlieren, electrostatic probe and thermocouple. The thickness of preheated zone in lycopodium dust flame is observed to be 4~13 mm, about several orders of magnitude higher than that of premixed gaseous flames. From the experimental results by a PIV(Particle Image Velocimetry) system, a certain residence time of the unburned particle in preheated zone is needed to generate combustible gas from the particle. The residence time will depend on preheated zone thickness, particle velocity and flame propagation velocity.
A Study of Co-Combustion Characteristics of North Korean Anthracite and Bituminous Coal in 2 MWe CFBC Power Plant
Han, Keun-Hee ; Hyun, Ju-Soo ; Choi, Won-Kil ; Lee, Jong-seop ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 580~586
In this study, co-combustion characteristics of Chinese bituminous coal and North Korean anthracite were investigated using a 2 MWe scale circulating fluidized bed power plant. At first, the combustion efficiency of bituminous coal of China and Australia as a function of excess air ratio and temperature were observed. The results showed that the combustion efficiency was influenced by particle size and volatile content of coal, the combustion efficiency of Chinese bituminous coal was over 99.5%. The unburned carbon particles from fly ash and bottom ash were a content 5~7% and 0.3%, respectively. The combustion efficiency with the mixture ratio 20% of bituminous coal and anthracite decreased over 5% because of the increase of entrained particles by a small average particle size of anthracite in the combustor. However, the outlet concentration of
was not changed remarkably. The concentrations of the typical air pollutants such as
were 200~250 ppm(
6%), 100~320 ppm(
6%) respectively. The outlet concentration of
was decreased to 30~65% with NH3 supplying rate of 2~13 l/min in SCR process. The
removal efficiency was up to 70% by in-furnace desulfurization using limestone with Ca/S molar of approximately 6.5. With wet scrubbing using
as absorbent, the
removal efficiency reached 100% under near pH 5.0 of scrubbing liquid.
Heat Transfer Model and Energy Dissipation Rate in Bubble Columns with Continuous Operation
Jang, Ji-Hwa ; Seo, Myung-Jae ; Lim, Dae-Ho ; Kang, Yong ; Jung, Heon ; Lee, Ho-Tae ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 587~592
Heat transfer model and energy dissipation rate were investigated to examine the heat transfer mechanism in bubble columns with continuous operation. The energy dissipation rate(
) obtained from the unsteady state heat transfer model based on the surface renewal theory was significantly small, comparing with the hydrodynamic energy dissipation rate(
) calculated from the overall hydrodynamic energy balance based on the behaviors and holdups of gas and liquid phases in the column. It was found from these results that the energy dissipation rate based on the surface renewal theory is independent of the hydrodynamic energy dissipation rate obtained from the overall hydrodynamic energy balance in the bubble column, in considering their mechanism. The different two energy dissipation rates were correlated in terms of operating variables within this experimental conditions, respectively.
Determination of Unimark 1494DB in Petroleum using HPLC
Lim, Young-Kwan ; Kim, Dong-Kil ; Yim, Eui-Soon ; Shin, Seong-Cheol ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 593~598
In this study, the qualitative and quantitative analytical method for petroleum marker(Unimark 1494DB) in common diesel involved kerosene and byproduct fuel was developed using SPE pretreatment and high performance liquid chromatography. In SPE pretreatment process, the highest concentrated marker was obtained 15 minutes after addition of petroleum sample. The petroleum marker was detected with 1626.92 mV·sec intensity at 9.8 minutes retention time in 1 mg/L content in petrodiesel after pretreatment. Also petroleum marker was selectively identified in an acidic petroleum product which was previously difficult to be analyzed by UV-Vis Spectroscopy.
Correlations between the Important Physical Properties of Natural Gas
Ha, Young-Cheol ; Lee, Seong-Min ; Her, Jae-Young ; Lee, Kang-Jin ; Lee, Seung-Jun ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 599~607
This study was conducted to derive the five correlations which could predict specific gravity(or heating value), compression factor, density, etc., if we know heating value or specific gravity only. To make a sufficient number of raw data for regression, SGERG EOS was modified into equation of heating value. Based on these raw data, five correlations were obtained and the uncertainties of the correlations were evaluated. The results showed that the uncertainties were near 0.1% in most conditions of natural gas and so the correlations could be used in natural gas industry and academic fields.
Nitrogen and Oxygen Sorption Behaviors of Ruthenium-Substituted SBA 15(Ru-SBA-15)
Seo, Yoon-Ah ; Kim, Hyung-Kook ; Shin, Jeong-Hun ; Kim, Il ; Ha, Chang-Sik ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 608~614
In this work, ruthenium substituted SBA-15's(Ru-SBA15's) of various Si/Ru ratios were prepared using a non-ionic triblock copolymer surfactant,
, as template. We investigated the nitrogen or oxygen adsorption/desorption behaviors of the Ru-SBA-15's for their future applications as catalysts or selective adsorbents, etc. The pore size of the Ru-SBA-15's was determined by both the Barrett-Joyner-Halenda(BJH)(
) and the Broekhoff-de Boer analysis with a Frenkel-Halsey-Hill isotherm(BdB-FFF) method(
of the Ru-SBA-15 having 50/1 ratio of Si/Ru were 3.9 nm and 4.7 nm, respectively. The transmission electron microscope(TEM) image of the Ru-SBA 15 of the Si/Ru mole ratio of 50 showed that the pore size is 4.7 nm, which is consistent with the
adsorption results with the BdB-FHH method. The surface area of pores form oxygen adsorption/desorption isotherm was higher than that from the nitrogen adsorption/desorption isotherm by the Brunauer-Emmett-Teller(BET) method, which were respectively 612.7
/g, and 573.3
/g. X-ray diffraction(XRD) patterns and TEM analyses showed that the mesoporous materials possess well-ordered hexagonal arrays.
Batch Chromatography Simulation of Tröger base by Aspen Chromatography
Kim, Jung-Ae ; Park, Moon-Bae ; Kim, In-Ho ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 615~619
(+)-Tröger's base in Tr
ger's base racemates that inhibits thromboxane A2(T
A2) synthase has been used to treat arteriosclerosis. Separation of (+)-Tröger's base by chromatography has become a major concern. However separation experiments of (+)-Tröger's base need time and consumables so that simulation with Aspen Chromatography could save time and costs by predicting the efficiency of separation. Injection amount and eluent flow rate were varied to compare the resolutions and yields of TB(−) and TB(+). Highest resolution and yield were attained at the eluent rate of 0.25 mL/min. Isotherms representing the relationship between mobile phase concentration and stationary phase concentration were changed to get the best separation with Ideal Adsorbed Solution(IAS) Statistical Lanmuir isotherms.
Production and Recovery of Oxygenated Fatty Acids from Oleic Acid by Flavobacterium sp. Strain DS5
Heo, Shin-Haeng ; Kim, Beom-Soo ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 620~623
Flavobacterium sp. strain DS5(NRRL B-14859) was used to convert oleic acid to 10-ketostearic acid(10-KSA) via 10-hydroxystearic acid(10-HSA). Increase in cell concentration by centrifuging, collecting cells grown in two flasks, and resuspending in one flask, improved 10-KSA production to 6.5 g/L from 3.5 g/L in a usual flask culture. Tween-80 addition to the culture did not greatly affect the production of 10-KSA and 10-HSA. When culture broth was centrifuged after fermentation, it was observed that pellets were separated into two parts(yellow and white). Gas chromatography analysis showed that 10-KSA and 10-HSA were detected only in a white pellet, suggesting that the bioconversion products of strain DS5 are extracellularly produced and can be easily recovered from cells by a simple centrifugation step.
Development of Screening Method for the Soluble Recombinant Protein using
--Lactamase as a Fusion Partner
Lee, Jae-Hun ; Hwang, Bum-Yeol ; Kim, Byung-Gee ; Lee, Sun-Gu ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 624~629
It is the most important step to screen soluble and insoluble proteins when we attempt to improve the solubility of recombinant proteins through directed evolution approach. Here we show that the solubility of a recombinant protein in vivo can be examined by expressing the recombinant protein with beta-lactamase as a fusion partner. First we constructed an expression system which can produc a fusion protein with the C-terminal of beta-lactamase. Two soluble proteins, i.e. adenine deaminase and aspartate aminotransferase, and insoluble GlcNAc-2-epimerase were cloned into the developed expression vector, respectively. We investigated the effect of the expression of the three recombinant fusion proteins on the growth of E. coli, and confirmed that the solubilities of the recombinant proteins correlated with cell growth rates.
Computational Fluid Dynamics(CFD) Simulation and in situ Experimental Validation for the Urea-Based Selective Non-Catalytic Reduction(SNCR) Process in a Municipal Incinerator
Kang, Tae-Ho ; Nguyen, Thanh D.B. ; Lim, Young-Il ; Kim, Seong-Joon ; Eom, Won-Hyeon ; Yoo, Kyung-Seun ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 630~638
A computational fluid dynamics(CFD) model is developed and validated with on-site experiments for a urea-based SNCR(selective non-catalytic reduction) process to reduce the nitrogen oxides(NO
) in a municipal incinerator. The three-dimensional turbulent reacting flow CFD model having a seven global reaction mechanism under the condition of low CO concentration and 12% excess air and droplet evaporation is used for fluid dynamics simulation of the SNCR process installed in the incinerator. In this SNCR process, urea solution and atomizing air were injected into the secondary combustor, using one front nozzle and two side nozzles. The exit temperature(980
) of simulation has the same value as in situ experiment one. The NO
reduction efficiencies of 57% and 59% are obtained from the experiment and CFD simulation, respectively at NSR=1.8(normalized stoichiometric ratio) for the equal flow rate ratio from the three nozzles. It is observed in the CFD simulations with varying the flowrate ratio of the three nozzles that the injection of a two times larger front nozzle flowrate than the side nozzle flowrate produces 8% higher NO
reduction efficiency than the injection of the equal ratio flowrate in each nozzle.
The Simultaneous Absorption Rate of CO
from Flue Gas with Aqueous Alkanolamine Solutions
Seo, Jong-Beom ; Choi, Won-Joon ; Kim, Jae-Won ; Choi, Bong-Wook ; Oh, Kwang-Joong ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 639~645
In this study, alkanolamine was used to achieve high absorption rates for CO
as suggested at several literatures. The absorption rates of aqueous AMP and MEA solutions with CO
were measured using a stirredcell reactor. The reaction rate constants were determined from the measured absorption rates. The performances were evaluated under various operating conditions. As a result, the reactions with SO
into aqueous AMP and MEA solutions were classified as an instantaneous reaction respectively. The absorption rates increased with increase of the reaction temperature and the concentration of absorbents. The simultaneous absorption rate of CO
into 3, 5, 10 wt.% MEA at various pressure of CO
, was more increased 14~20% than AMP solution. We investigated the effect of SO
on the simultaneous absorption of CO
from a flue gas. The performances were evaluated under various operating conditions in order to investigate the absorption characteristic.
Removal of CO
) Using Nanoporous Na
Bae, Jong-Soo ; Park, Joo-Won ; Kim, Jae-Ho ; Lee, Jae-Goo ; Kim, Young-Hun ; Han, Choon ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 646~650
Hydrocarbon gases generated from the gasification of waste could be converted into CO
using reforming catalysts and then CO
was selectively adsorbed and removed to obtain pure hydrogen. To optimize adsorption efficiency for CO
was supported on nanoporous alumina and the efficiency was compared with commercial alumina(Degussa). Nanoporous adsorbents formed more uniform pores and larger surface area compared to adsorbents using commercial alumina. The increase of Na
loading improved adsorption of CO
. Finally, the highest adsorption capacity per unit mass of Na
could be achieved when the loading of Na
reached up to 20wt%. When the content of Na
increased above 20 wt%, it aggregated on the surface, and the pore volume was decreased. Used adsorbents could be recycled by the thermal treatment.
Influence of Reaction Parameters on Preparation of Biodiesel from Palm Oil using Supercritical Methanol
Ryu, Jae-Hun ; Lee, Si-Hong ; Shin, Hee-Yong ; Bae, Seong-Youl ;
Korean Chemical Engineering Research, volume 47, issue 5, 2009, Pages 651~654
In this study, non-catalytic transesterification using supercritical methanol was performed for preparation of biodiesel from palm oil. In order to investigate the effects of reaction parameters such as molar ratio of methanol to oil(30:1~60:1), pressure(8~25 MPa), temperature(320~350
), agitation speed(0~1,000 rpm) and time(0~20 min) on the content of fatty acid methyl esters(FAMEs), we carried out the study using a batch reactor. With increasing molar ratio of methanol to oil, the content of FAMEs increased. However, the content of FAMEs was little affected by molar ratio above 45 and pressure above 20 MPa. The content of FAMEs increased when the temperature increased. However, the content of FAMEs decreased with temperature above at 350
and with time above 5 min. It was found that the agitation speed above 500 rpm scarcely affected the content of FAMEs. The highest content of FAMEs in biodiesel(95%) was obtained under the reaction conditions: temperature of 335
, pressure of 20 MPa, molar ratio of 45:1(methanol to palm oil), agitation speed of 500 rpm and time of 10 min.