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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Applied Chemistry for Engineering
Journal Basic Information
Journal DOI :
The Korean Society of Industrial and Engineering Chemistry
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Volume & Issues
Volume 20, Issue 6 - Dec 2009
Volume 20, Issue 5 - Oct 2009
Volume 20, Issue 4 - Aug 2009
Volume 20, Issue 3 - Jun 2009
Volume 20, Issue 2 - Apr 2009
Volume 20, Issue 1 - Feb 2009
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Research and Development Trends on Bio-oil Upgrading via Catalytic Vapor Cracking
Park, Hyun-Ju ; Jeon, Jong-Ki ; Park, Sung-Hoon ; Yim, Jin-Heong ; Sohn, Jung-Min ; Park, Young-Kwon ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 1~8
Bio-oil has attracted considerable interest as one of the promising renewable energy resources because it can be used as a feedstock in conventional petroleum refineries for the production of high value chemicals or next-generation hydrocarbon fuels. Currently, catalytic vapor cracking is considered the most potential upgrading method for stabilization of bio-oil, which is a pre-process required prior to feeding bio-oil into refineries. This review introduces the recent research and development trends on bio-oil upgrading via catalytic vapor cracking, focusing on catalysts and upgrading methods used.
Measurement of Isoelectric Point of Amine Oxide Zwitterionic Surfactant by QCM (Quartz Crystal Microbalance)
Kim, Ji-Sung ; Park, Jun-Seok ; Lim, Jong-Choo ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 9~14
A zwitterionic surfactant shows not only detergency but also softening effect since it shows characteristics of a nonionic or an anionic surfactant above an isoelectric point, while showing characteristics of a cationic surfactant below an isoelectric point. Therefore, a zwitterionic surfactant can serve as a dual function surfactant by a single molecule through the interconversion of cleaning and softening effects depending on pH of the aqueous solution. In this study, the dual function characteristics of an amine oxide zwitterionic surfactant were investigated by measuring the zeta potential and the isoelectric point using quartz crystal microbalance (QCM). In addition, the physical properties of an amine oxide surfactant such as critical micelle concentration, surface tension, interfacial tension, contact angle and viscosity were measured and phase behavior study was also performed. The isoelectric point of an amine oxide surfactant determined by zeta potential measurement was near 7.35 and that obtained by QCM experiment was about 7.4, where both results were found to be close to the value reported in the literature.
Solubilization Mechanism of n-Octane by Polymeric Nonionic Surfactant Solution
Bae, Min-Jung ; Im, Jong-Choo ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 15~20
In this study, solubilization experiments of n-octane oil were performed by micellar solutions of polymeric nonionic surfactant Pluronic L64
at room temperature. A single spherical drop of n-octane was injected into aqueous surfactant solution using an oil drop contacting technique and solubilization rate of n-octane was measured by observing the size of oil drop with time. It was found that solubilization rate was independent of initial oil drop size but inversely proportional to the initial surfactant concentration. These results revealed that solubilization of n-octane oil by L64 micellar solution is controlled by interface-controlled mechanism rather than diffusion-controlled mechanism. Dynamic interfacial tension measurements showed that interfacial tension decreases such as from
and further to
mN/m as surfactant concentration increases from 8 to 9 and further to 10 wt% respectively. The equilibration time was also found to decrease slightly with an increase in surfactant concentration. All three systems reached an equilibrium within 7 minutes.
Adsorption Characteristic of Rare Earth Metal Ions on 1-Aza-15-Crown-5-Styrene (Hazardous Materials)-DVB Resin
Roh, Gi-Hwan ; Kim, Kwan-Chun ; Kim, Sun-Hwa ; Kim, Joon-Tae ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 21~27
Resins were synthesized by mixing 1-aza-15-crown-5 macrocyclic ligand attached to styrene (a hazardous material) divinylbenzene (DVB) copolymer with crosslink of 1％, 2％, 5％ and 20％ by a substitution reaction. The characteristic of these resins was confirmed by the content of chlorine, element analysis, thermogravimetric analysis (TGA), surface area (BET), and IR-spectroscopy. The effects of pH, time, dielectric constant of solvents and crosslink on adsorption of metal ions by the synthetic resin adsorbent were investigated. The metal ion was showed a fast adsorption on the resins above pH 3. The optimum equilibrium time for adsorption of metallic ions was about two hours. The adsorption selectivity determined in ethanol was in increasing order of uranium (
) > manganese (
) > praseodymium (
). The adsorption was in the order of 1％, 2％, 5％, and 20％ crosslink resin and adsorption of resin decreased in proportion to the order of dielectric constant of solvents.
Fabrication of Carbon Nanotube Supported Molybdenum Carbide Catalyst and Electrochemical Oxidation Properties
Cho, Hong-Baek ; Suh, Min-Ho ; Park, Yeung-Ho ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 28~33
Carbon nanotube supported molybdenum carbide catalysts were prepared as a function of various preparation conditions and characterized, and their catalytic activities were compared through electrochemical oxidation of methanol. To overcome the low activity of a transition metal catalyst, carbon nanotube was used as a support, and the amount and the kind of precursors, acid treatment method, and carburization temperature were varied for the catalyst preparation. ICP-AES, XRD and TEM were used for the catalyst characterization. Based on the various preparation methods of carbon nanotube supported molybdenum carbide catalysts (Mo2C/CNT), the size and the amount of supported catalysts could be controlled, and their effects on the electrochemical oxidation could be explained.
Decolorization of Real Textile Wastewater by Coagulation Conditions
Hong, Young-Ho ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 34~39
This study was carried out in order to investigate the decolorization and reduced sludge of real textile wastewater by coagulation process. The aim of the study was to verify the relation between decolorization and coagulants of real textile wastewater treatment processes. Coagulation processes were performed using
. Real textile wastewater has a mean concentration for BOD, COD, pH, color to be 800 mg/L, 600 mg/L, 9.7, and 102, respectively. From the experimental results, it was shown that the
exhibited higher decolorization at the operating conditions 335∼2000 mg/L of coagulants and 500 mg/L NaOH dosage. The efficiency of color removal depended on the wastewater pH and concentration of coagulants.
Synthesis of N-Alkylcarbazole-3-Vinylene-2-Methyl-4-Dicyanomethylene-4H-Pyran
Chung, Pyung-Jin ; Sung, Jin-Hee ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 40~45
N-Alkylcarbazole-3-vinylene-2-methyl-4-dicyanomethylene-4H-pyran derivatives were synthesized by dehydration,
, Vilsmeier, and Knoevenagel condensation. They are red-emitting materials for organic light emitting device (OLED) composed of electron donor of N-alkylcabazole-3-vinylene groups and electron acceptor of 2-methyl-4-dicyanomethylene-4H-pyran groups by a conjugated structure. The structural properties of reaction products were analyzed FT-IR and
spectroscopy. The thermal stabilities and reactivities were measured by melting points and yields. The UV-visibles and PL properties can be determined by exitation spectra and emission spectra, respectively.
Synthesis of Subphthalocyanine Compound Derivatives and Their Properties
Kim, Jae-Hwan ; Heo, Jin ; Lee, Yun-Yi ; Kim, Bo-Hyun ; Lee, Geun-Dae ; Hong, Seong-Soo ; Park, Seong-Soo ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 46~51
Subphthalocyanine (SubPc) derivatives consisting of the different kinds and positions of substitute group were successfully synthesized using various types of the precursor as the intermediate compound. The chemical structure of precursor and product was determined by the means of
and FT-IR spectrometer. Also, spectroscopic and crystalline properties were determined by means of UV-Vis spectrometer and XRD, respectively. It was found that SubPc derivatives absorbed selectively visible light ranging from 560 to 600 nm, their solubility was enhanced by introducing substitute groups, and their maximum absorbing wavelength was shifted by changing the kind and position of substitute groups.
A Study on the Reactivity, Performance of 4HBA Modified High Solid Acrylic Polyurethane Paint
Seo, Seok-Hwan ; Suh, Cha-Soo ; Park, Jin-Hwan ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 52~61
In this study, TAPEH (t-amyl peroxy 2-ethyl hexanoate) was selected for the reaction initiator which is a core factor for developing acrylic polyol binder. Tone M100 (caprolactone acrylate), 4HBA (4-hydroxy butyl acrylate), and 2HEMA (2-hydroxy ethyl methacrylate) were used for hydroxy-monomers. To check the applicability of raw materials mentioned above into the binders of 2 components acrylic polyurethane paint and reduce the VOC, the reactivity and film performance by different kinds of aliphatic polyisocyanate hardeners which are already generalized were reviewed. As the Tin-based catalyst has been regulated, the comparison test of reactivity and performance between the conventional catalyst and non-toxic metal catalyst recommended as the alternative was conducted as well. As a result, we were able to obtain the basic data which are necessary for applying 2 components high solid polyurethane paint and also reached a conclusion that it can be applied for developing new paints in terms of high performance, workability and environmental care.
Steam Gasification Characteristics of Oil Sand Coke in a Lab-Scale Fixed Bed Gasifier
Yoon, Sang-Jun ; Choi, Young-Chan ; Lee, See-Hoon ; Lee, Jae-Goo ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 62~66
Utilization and interest of unconventional fuel and process residue such as oil sand and its residue, oil sand coke, have been increased because of the continuous rise of fuel price and conventional fuel availability. In this study, the gasification of oil sand coke produced from coking process of oil sand was performed to utilize as an energy resource using lab-scale fixed bed gasification system. The combustion characteristics of oil sand bitumen and oil sand coke were investigated by using TGA and lab-scale gasification system was applied to reveal the characteristics of produced syngas composition with oxygen/fuel ratio, temperature and steam injection rate. Oil sand coke shows a high carbon content, heating value and sulfur content and low ash content and reactivity. In case of oil sand coke gasification, generally with increasing temperature, the amount of steam introduced and decreasing oxygen injection rate,
content in product gas increased while the
content decreased. The calorific value of syngas shows about 2100
and this result indicates that the oil sand coke can be used as a resource of hydrogen and fuel.
Physical Properties of Polymer Composite Recycling Recycled Aggregate
Hwang, Eui-Hwan ; Jeon, Jong-Ki ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 67~74
Nowadays, recycling of recycled aggregates from the waste concrete is seriously demanded for the protection of environment and the shortage of aggregates owing to the large scale construction project. In this study, for the development of polymer composite recycling recycled aggregates from the waste concrete, twenty five specimens of the polymer composite were prepared with the five levels of replacement ratios of recycled aggregates (0, 25, 50, 75, 100%) and polymer-cement ratios (0,5, 10, 15, 20%), respectively. For the evaluation of the performance of polymer composite specimens, various physical properties such as compressive and flexural strengths, water absorption, hot water resistance, total pore volume and porosity were investigated. As a result, physical properties of polymer composite were remarkably improved with an increase of polymer cement ratios, but greatly decreased with the replacement ratios of recycled aggregates.
Study on Characteristics and Preparation of Binderless BaX Granules for Separation of p-Xylene
Jin, Jung-Hyun ; Suh, Jeong-Kwon ; Hong, Ji-Sook ; Kim, Beum-Sik ; Lee, Chang-Ha ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 80~86
In this study, binderless zeolite BaX granule, an effective adsorbent for the separation of p-xylene was made. This adsorbent which has a sufficient strength, high specific surface area and selectivity to p-xylene was prepared by various steps, such as granulation process, calcination, binderless treatment, ion-exchange, and activation. In the granulation, the concentration of colloidal silica solution was controlled in order to confirm the effect of
contents after binderless treatment. As a result, we confirmed that the compressive strength of granule after binderless treatment was increasing with increasing proportion of
in the granule. And then Na-ion in granule was exchanged with Ba-ion by successive batch ion-exchange process. And then prepared adsorbents were tested for p-xylene separation by batch adsorption at 90
. As a results of batch adsortion test, we confirmed that prepared adsorbents have a high selectivity to p-xylene. Also, it could be conformed that the prepared binderless zeolite BaX has a sufficient compressive strength (0.450 kgf), high specific surface area
, high crystallinity (98.5% compared with zeolite NaX powder), and selectivity to p-xylene.
Removal Characteristics of Dichloroacetic Acid at Different Catalyst Media with Advanced Oxidation Process Using Ozone/Catalyst
Park, Jin-Do ; Lee, Hak-Sung ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 87~93
Pd/activated carbon (Pd/AC) and Pd/alumina (Pd/AO) catalysts were prepared by the impregnation of palladium into activated carbon and alumina. The catalytic characteristics according to the kinds of support materials were compared. The decomposition efficiencies of ozone according to kinds of support materials are about the same when these were compared by adding 10 g of catalysts into the water saturated with ozone. The decomposition efficiencies and the oxidation characteristics (TOC,
) of dichloroacetic acid were compared with the ozone only process and the catalytic ozonations using Pd/activated carbon and Pd/alumina catalysts. The decomposition efficiencies of dichloroacetic acid by catalytic ozonations were better than the one by ozone only process, but there was slight difference of the one between Pd/activated carbon and Pd/alumina catalyst. The decomposition efficiency of dichloroacetic acid was increased with increasing ozone dose at a constant concentration of dichloroacetic acid, but the one was little increased with increasing ozone dose at more than 1.0 L/min of ozone dose. It was seemed that the bicarbonate and the chloric ion formed throughout the decomposition of dichloroacetic acid acted as the scavenger of hydroxyl radical.
Measurement of Bubble Points of Dimethyl Carbonate and Carbon Dioxide Mixtures
Ahn, Joon-Yong ; Lee, Byung-Chul ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 94~98
The bubble point pressures of dimethyl carbonate and carbon dioxide mixtures were measured by using a high-pressure experimental apparatus equipped with a variable-volume view cell, at various
compositions in the range of temperatures above the critical temperature of
and below the critical temperature of dimethyl carbonate. The experimental bubble point pressure data were correlated with the Peng-Robinson equation of state (PR-EOS) to estimate the corresponding dew point compositions at equilibrium with the bubble point compositions. The experimentally measured bubble point pressures gave good agreement with those calculated by the PR-EOS. The variable-volume view cell equipment was verified to be an easy and quick way to measure the bubble point pressures of high-pressure compressible fluid mixtures.
Notching Phenomena of Silicon Gate Electrode in Plasma Etching Process
Lee, Won-Gyu ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 99~103
gas ambient for the high density plasma gate etching has been used to increase the performance of gate electrode in semiconductor devices. When an un-doped amorphous silicon layer was used for a gate electrode material, the notching profile was observed at the outer sidewall foot of the outermost line. This phenomenon can be explained by the electron shading effect: i.e., electrons are captured at the photoresist sidewall while ions pass through the photoresist sidewall and reach the oxide surface at a narrowly spaced pattern during the over etch step. The potential distribution between gate lines deflects the ions trajectory toward the gate sidewall. In this study, an appropriate mechanism was proposed to explain the occurrence of notching in the gate electrode of un-doped amorphous silicon.
CFD Simulation of Pd-Ag Membrane Process for
Oh, Min ; Park, Jun-Yong ; Noh, Seung-Hyo ; Hong, Seong-Uk ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 104~108
In this study, for the flow of carbon dioxide/hydrogen mixture through a tubular type Pd-Ag membrane, hydrogen partial pressure, velocity profile, and concentration profile were simulated as a function of inlet flow rate using computational fluid dynamics (CFD) technique. The simulation results indicated that the mole fraction of carbon dioxide increased slowly in the longitudinal direction as the flow rate increased. In addition, the effects of inlet flow rate and the length of membrane on hydrogen recovery were investigated. At lower flow rate and for longer membrane, the hydrogen recovery was larger.
Development of a Carbonization Activator
Jung, Dong-Hyun ; Lim, Mun-Sup ; Song, Joo-Sub ; Chun, Young-Nam ;
Applied Chemistry for Engineering, volume 20, issue 1, 2009, Pages 109~115
The purposes of this study are to treat sewage sludge that has increasingly become an issue and to recycle it as the adsorbent. The adsorbent was produced by carbonization and simultaneous steam activation, and its characteristics were studied. Parametric screening studies were carried out for the preparation of good adsorbent. Optimum operating conditions were confirmed as input carbonization-activated temperature of 840
, feed steam flow rate of 70 g/min, carbonization-activated time of 30 min and feed dried sludge of 10.8 kg/day, respectively. At this time, the iodine adsorptivity was maximized as 328.1 mg/g. Pore development, structure, element compound and content were confirmed by using nanoPOROSITY, SEM (Scanning electron microscope), and EDS (Energy dispersive spectroscopy). Through this result, it was known that the adsorbent derived from sewage sludge could be used for the treatment of leachate in a landfill, VOCs (Volatile organic compounds), and so on.