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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
Editor in Chief :
Volume & Issues
Volume 22, Issue 6 - Dec 2011
Volume 22, Issue 5 - Oct 2011
Volume 22, Issue 4 - Aug 2011
Volume 22, Issue 3 - Jun 2011
Volume 22, Issue 2 - Apr 2011
Volume 22, Issue 1 - Feb 2011
Selecting the target year
Green Catalysts for Isobutane Alkylation Process
Yoo, Kye Sang ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 587~593
As a result of increasing environmental concerns related to air quality and maintenance of automobiles, the alkylation of isobutane with olefins has become an even more important process for production of high quality gasoline. However, the widespread use of the alkylation process is limited by the polluting and corrosive liquid acid catalysts (HF and
) currently used in industry. For the reason, a large number of solid catalysts, especially zeolites, have been studied as an environmental friendly catalyst in this process. Recently, mesoporous solid acids and ionic liquids have been investigated as a green catalyst. In this review, the research of environmental friendly catalysts for an isobutane alkylation is summarized.
Synthesis of Green Emitting Materials for OLED
Chung, Pyung Jin ; Kim, Mi Rae ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 594~598
We study on the preparation of green emitting materials for organic light emitting device. 3-chromonealdehyde derivatives possessing a conjugated structure, which were composed of electron acceptor of 3-chromonealdehydes and electron donor of diamines, were synthesized by dehydration-condensation process. 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 excitation spectra and emission spectra, respectively.
The Efficacy of
-cyclodextrin/polyethyleneimine/silk Fibroin Hydrogel in Healing Burnt Wound
Seo, Seung Ree ; Lee, Mi Sun ; Kim, Jin-Chul ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 599~604
In this study, we investigated the efficacy of
CD) hydrorogel containing silk fibroin (SF) on healing burnt wound. Tosyl
CD was conjugated to polyethyleneimine (PEI) using epichlorohydrin (EPI) as a cross-linker. The
CD/PEI/SF hydrogel was applied on the back of mouse and then the efficacy of hydrogel was compared with both positive control group and negative control group. There was no wound healing efficacy showed neither in the drug loaded
CD/PEI/SF hydrogel group nor in the drug unloaded
CD/PEI/SF hydrogel group. On the other hand, in the positive control group, a significant reduction of the wound size after the usage of OTC hydrorogel was obtained. The burn-healing histological result showed a similar phenomenon. After hematoxylin-eosin staining the skin induced by burning, and the epithelial growth observed in the dermis, the efficacy of
CD/PEI/SF hydrogel in healing burnt wound could not be clearly identified.
A Study on the Oxygen Behavior Characterization of
Catalysts by Ball Milling
Kwon, Dong Wook ; Park, Kwang Hee ; Lee, Sang Moon ; Jang, Du Hun ; Hong, Sung Chang ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 605~609
We study on the oxygen behavior of
catalysts in the
-selective catalytic reduction (SCR) prepared by the ball milling processing. There are not any changes in crystal structure and surface area of the
catalyst by ball milling, but the maximal reduction temperature decreased in
programmed reduction (TPR) analysis. Experimental observations with various concentrations of oxygen indicate that all catalysts showed a very low NOx conversion rate in the absence of oxygen and the reactivity of ball milled catalyst higher depending on the oxygen. It is occurred because the degree of participation of atmospheric oxygen and lattice oxygen is great than that of the not-milled catalyst.
Preparation and Characterization of UV-cured Polyurethane Acrylate/ZnO Nanocomposite Films
Jeon, Gwonyoung ; Park, Su-Il ; Seo, Jongchul ; Seo, Kwangwon ; Han, Haksoo ; You, Young Chul ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 610~616
A series of polyurethane acrylate/ZnO (PUA/ZnO) nanocomposite films with different ZnO contents were successfully prepared via a UV-curing system. The synthesis and physical properties including morphological structure, thermal properties, barrier properties and optical properties, and antimicrobial properties were investigated as a function of ZnO concentration. FTIR and SEM results showed that these PUA/ZnO nanocomposite films did not have a strong interaction between PUA and ZnO, which may lead to no increase in thermal stability. By incorporating ZnO nanoparticles, the UV blocking and antibacterial properties increased as the content of ZnO increased. Specially, the oxygen permeability in composite films changed from 2005
by adding the ZnO nanoparticle, which indicates that the PUA/ZnO nanocomposite films can be applied as good barrier packaging materials. Physical properties of the UV-cured PUA/ZnO nanocomposite film are strongly dependent upon the dispersion state of ZnO nanoparticles and their morphology in the films.
Removal of COD and Color from Anaerobic Digestion Effluent of Livestock Wastewater by Advanced Oxidation Using Microbubbled Ozone
Lee, Inkyu ; Lee, Eunyoung ; Lee, Hyejung ; Lee, Kisay ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 617~622
Ozone-based advanced oxidation was applied for the treatment of anaerobic digestion effluent of livestock wastewater. Initial COD and color value were 930 mg/L and 0.04, respectively, and the 1/10-diluted wastewater was used for the study. The treatment characteristics were compared between the conventionally generated ozone (105
) and microbubbled ozone (13
). The use of microbubbled ozone improved the removal of chemical oxygen demand (COD) and color by 85% and 26%, respectively, compared with the conventionally bubbled ozone. The application of microbubbled
combinations resulted in 5~10% higher color removal than ozone alone, which implies that the contribution of UV or
is not significant in color removal. On the other hand, COD removal could be increased two folds compared with ozone alone through
combination. The contribution of
was bigger than UV for COD removal with microbubbled ozone. Due to the enhancement of dissolved ozone and radical activity, the microbubbling enabled us to additional COD removal even after stopping ozone supply in the presence of UV or
Synthesis and Characterization of 4-Component Polyimide Films with Various Diamine and Dianhydride Compositions
Park, Yun Jun ; Yu, Duk Man ; Choi, Jong Ho ; Ahn, Jeong-Ho ; Hong, Young Taik ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 623~626
Various poly(amic acid)s were synthesized from PMDA/BPDA/p-PDA/ODA with different mole ratios and effectively converted into 4-component polyimide films by thermal imidization. The chemical structures and thermo-mechanical properties of polyimide films were examined using Fourier transform infrared spectroscopy (FT-IR), thermo-gravimetric analyzer (TGA), thermo-mechanical analyzer (TMA), dynamic mechanical analyzer (DMA) and universal tensile machine (UTM). The tensile strength, modulus, and thermal properties of polyimides films increased with the amount of rigid PMDA and p-PDA, while the elongation and moisture absorption of polyimide films increased with the amount of flexible BPDA and ODA. One of 4-component polyimide films exhibited a similar coefficient of thermal expansion (CTE) value to that of copper when it was composed of PMDA : BPDA : p-PDA : ODA with the ratio of 5 : 5 : 4 : 6. Thus, this polyimide film could be useful for a base film for flexible copper clad laminates (FCCL) of flexible printed circuit boards.
Catalytic Pyrolysis of Various Carbon Number Feed Oil Using a Spouted Bed Reactor
Yoo, Kyeong Seun ; Park, Sung Hoon ; Park, Young-Kwon ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 627~630
We focus on a catalytic process based on direct injection method that can produce high-quality oils of gasoline and kerosene with various carbon-number feed oils. The reaction characteristics of a commercial catalyst were analyzed using a spouted bed reactor. Decane and pentadecane were used to compare the characteristics of the fixed bed and the spouted bed reactor. The yield of gasoline plus kerosene was highest at the reaction temperature of 550
. For the spouted bed reactor, the at-a-pulse injection was more effective for catalytic cracking of feed oils than multiple consecutive injections. The reaction activity became higher as the carbon number of feed oil is larger.
Effect of Size and Morphology of Silica Abrasives on Oxide Removal Rate for Chemical Mechanical Polishing
Lee, Jinho ; Lim, Hyung Mi ; Huh, Su-Hyun ; Jeong, Jeong-Hwan ; Kim, Dae Sung ; Lee, Seung-Ho ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 631~635
Spherical and non-spherical silica particles prepared by the direct oxidation were studied for the effect of the particle size and shape of these particles on oxide CMP removal rate. Spherical silica particles, which have 10~100 nm in size, were prepared by the direct oxidation process from silicon in the presence of alkali catalyst. The 10 nm silica particles were aggregated by addition of an acid, an alcohol, or a silane as an aggregation inducer between the particles. Two or more aggregated silica particles were used as a seed to grow non spherical silica particles in the direct oxidation process of silicon in the presence of alkali catalyst. The oxide removal rate of spherical silica particles increased with increasing an average particle size for spherical silica abrasives in the oxide CMP. It further increased non-spherical particles, compared with the spherical particles in the similar average particle size.
Pyrolysis and Combustion Characteristics of an Pinus densiflora and Thinning-out Tree
Choi, Gyeong-Ho ; Kim, Seung-Soo ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 636~641
Since the mid-1990s, the number of fires continue to increase and the size has been also larger. However, the pyrolysis and combustion characteristics of the various species of the medium such as fallen leaves, herbaceous plants, conifers and broadleaf trees have scarcely been studied. In this paper, we investigate the pyrolysis and combustion of the typical domestic needle-leaf tree of Pinus densiflora and thinning-out tree by thermogravimetric analysis (TGA). Pinus densiflora was ignited at 200
and pyrolysis from 230
. In case of thinning-out tree was ignited and pyrolysis at 180
, respectively. The values of activation energy for pyrolysis were increased as the conversion efficiency increasing from 10% to 80%, whereas the values was decreased during combustion.
Study on the Fabrication of Porous Uranium Oxide Granule Using a Rotary Voloxidizer
Lee, Jae-Won ; Yun, Yeo-Wan ; Shin, Jin-Myeong ; Lee, Jung-Won ; Park, Guen-IL ; Park, Jang-Jin ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 642~647
The fabrication characteristics of porous uranium oxide granules from
powder was investigated in terms of initial particle bed motions such as slumping and rolling, thermal treatment conditions, and rotational velocities in slumping motion using a rotary voloxidizer. With respect to the initial particle bed motion the recovery rate of granule of above 1 mm in slumping motion was higher than that in the rolling motion. Rolling motion was changed into slumping motion with high slumping frequency by formation of granules from fine particles. Recovery rate of granule significantly increased with the increas in thermal treatment temperature and time of upto 10 h. As the rotational velocity of voloxidizer in the case of the initial particle bed showing slumping motion increased, the recovery rate of granule increased from 81.5 to 88.7%. However, the rotational velocity of 2 rpm provided an effective density, crushing strength and sphericity of granules.
Hydrogen Recombination over
Coated Ceramic Honeycomb Catalyst
Kang, Youn Suk ; Kim, Sung Su ; Seo, Phil Won ; Lee, Seung Hyun ; Hong, Sung Chang ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 648~652
Passive autocatalytic recombiner (PAR) is considered as an explosive gas control system in operating NPP plants. This work investigates and evaluates hydrogen recombination performance over manufactured
catalysts. When the space velocity increases, the hydrogen conversion decreased, while hydrogen depletion rate (g/sec) increases highly in 35000~100000
Gas Hourly Space Velocity (GHSV). Hydrogen conversion and depletion rate with Pt loading is investigated. As a result, there were no differences in the hydrogen conversion, but exothermic heating rate (K/sec) is increases as Pt loading increases. The catalyst showes a high hydrogen conversion efficiency of 80% under atmospheric conditions.
Conversion Characteristics of
in an Atmospheric Pressure Plasma Reactor
Kim, Tae Kyung ; Lee, Won Gyu ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 653~657
Conversion characteristics of
was studied using an atmospheric pressure plasma for the preparation of synthesis gas composed of
and CO. The effects of delivered power, total gas flow rate, and gas residence time in the reactor on the conversion of
were evaluated in a plasma reactor with the type of dielectric barrier discharge. The increase of reactor temperature did not affect on the increase of conversion if the temperature does not reach to the appropriate level. The conversion of
largely increased with increasing the delivered power. As the
ratio increased, the
conversion decreased, whereas the
conversion increased. Generally, the
convesion was higher than the
conversion through the variation of the process parameters.
Nitrogen Oxides Removal Characteristics of SNCR-SCR Hybrid System
Cha, Jin Sun ; Park, Sung Hoon ; Jeon, Jong-Ki ; Park, Young-Kwon ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 658~663
The SNCR-SCR (selective non-catalytic reduction-selective catalytic reduction) hybrid system is an economical NOx removal system. In this study, the effect of the operating parameters of the SNCR-SCR hybrid system on NOx removal efficiency was investigated. When the SNCR reactor was operated at a temperature lower than the optimum temperature (900~950
), an additional NO removal is obtained basesd on the utilization of
slip. On the other hand, the SNCR reactor operated above the temperature resulted in no additional NO removal of SCR due to decomposition of
. Therefore, the SNCR process should be operated at optimum temperature to obtain high NO removal efficiency and low
slip. Thus, it is important to adjust NSR (normalized stoichiometric ratio) so that
can be maintained at an appropriate level.
Structures and Properties of Semi-blown Petroleum Asphalt
Min, Kyung Eui ; Jeong, Han Mo ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 664~671
The vacuum residue of petroleum refinery, i.e. asphalt, was modified through a non-catalytic air blowing process to prepare the semi-blown asphalt. Changes in composition, chemical structure, and physical properties of asphalt were examined. The result from the thin layer chromatography showed that the asphaltene content in asphalt was increased by the air blowing on account of the aromatization of aliphatic hydrocarbon and condensation. These changes in molecular structure were also confirmed by
, differential scanning calorimetry, and thermogravimetry. Because of the molecular structure changes, the penetration of asphalt was decreased and the softening point and the flash point of asphalt were increased.
Electromagnetic Interference Shielding Behaviors of Electroless Nickel-loaded Carbon Fibers-reinforced Epoxy Matrix Composites
Hong, Myung-Sun ; Bae, Kyong-Min ; Lee, Hae-Seong ; Park, Soo-Jin ; An, Kay-Hyeok ; Kang, Shin-Jae ; Kim, Byung-Joo ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 672~678
In this work, carbon fibers were electrolessly Ni-plated in order to investigate the effect of metal plating on the electromagnetic shielding effectiveness (EMI-SE) of Ni-coated carbon fibers-reinforced epoxy matrix composites. The surfaces of carbon fibers were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Electric resistance of the composites was tested using a 4-point-probe electric resistivity tester. The EMI-SE of the composites was evaluated by means of the reflection and adsorption methods. From the results, it was found that the EMI-SE of the composites enhanced with increasing Ni plating time and content. In high frequency region, the EMI-SE didn't show further increasing with high Ni content (Ni-CF 10 min) compared to the Ni-CF 5 min sample. In conclusion, Ni content on the carbon fibers can be a key factor to determine the EMI-SE of the composites, but there can be an optimized metal content at a specific electromagnetic frequency region in this system.
A Study on the Rheological Properties of Branched Polypropylene/silicate Composites
Dahal, Prashanta ; Yoon, Kyung Hwa ; Kim, Youn Cheol ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 679~684
Branched polypropylenes (LCB-PP) with a long chain branch were prepared by the solid-state and molt-state reaction. Divinylbenzene (DVB), 1,4-benzenediol (RES), and furfuryl sulphide (FS) were used as branching agents of fabricate LCB-PP/silicate composites. Chemical structures, thermal properties, and rheological properties of the LCB-PP were determined by FT-IR, DSC, TGA, and dynamic rheometer (ARES). The chemical structure of the LCB-PP was confirmed by the existence of =C-H stretching peak of the branching agent at 3100
. From DSC and TGA results, the melting reaction was more effective than the solid state reaction in the manufacture of LCB-PP, which was additionally certified by rheological properties. Based on rheological properties, FS was the best for branching efficiency of PP. Compared to PP, LCB-PPs indicated an increase of complex viscosity in the low frequency and shear thinning tendency, and G'-G" plot represented an increase in elasticity and the heterogeneousness in a melt state. Rheological properties of LCB-PP/silicate composites were observed with the silicate content. When 5 wt% silicate was added in LCB-PP, distinct changes in the shear thinning and the slope of G'-G" plots were observed.
Solvothermal Preparation of Nanocrystalline
Using Alcohol-water Mixed Solvent
Lee, Sang Geun ; Park, Seong Soo ; Hong, Seong Soo ; Park, Jong Myung ; Lee, Seung Ho ; Kim, Dae Sung ; Lee, Gun Dae ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 685~690
In this study, a solvothermal reaction to prepare nanocrystalline titania was carried out using
and mixed solvents of alcohol and water. The effects of the type and the composition of alcohol on the crystal structure and agglomeration of final
products were investigated. The products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) as well as scanning electron microscopy (SEM). In the solvothermal reaction using the n-butanol solutions with different volume ratios of n-butanol/water (100/0, 75/25, 50/50, 25/75, 0/100), the extent of agglomeration of obtained rutile
was found to change with the volume ratio of n-butanol/water, and the n-butanol/water ratio of 75/25 revealed the best result for the preparation of well-dispersed nanocrystalline
powders. The crystal phase of
prepared through the solvothermal reaction changed with the type of alcohol in solvent (alcohol/water = 75/25).
products obtained with the aqueous solutions of methanol, ethanol and isopropanol have an anatase phase, while that with n-butanol has a rutile phase. The results showed that, in the solvothermal reaction using both
as a starting material and the alcohol-water mixed solvents without any other additive, the enhancement of dispersion and control of crystal structure of
products can be feasible by simply varying the composition and type of alcohol in the mixed solvents.
Synthesis and Characteristics of Hard Coating Solution Using Colloidal Silica and Organic Silane through Sol-Gel Process
Son, Dae Hee ; Lee, Yun-Yi ; Kim, Seong Jin ; Hong, Seong-Soo ; Lee, Gun-Dae ; Park, Seong Soo ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 691~696
Organic-inorganic hybrid coating solutions were prepared by using a sol-gel method for transparent film. In this study, colloidal silica (CS) and alkoxy silane such as vinyltrimethoxysilane (VTMS), and [3-(methacryloyloxy)]propyltri methoxy silane (MAPTMS) were used in various conditions such as types of organic silane, weight ratios of CS to silane and reaction times. Coating solutions which were bar coated on the PET (polyethyleneterephthalate) film and cured were investigated on the chemical and physical properties. The pencil hardness and adhesion of coating films were increased with increasing the organic silane content in the coating solution compared to that of PMMA (polymethamethylcrylate) coating solution.
Adsorption Characteristics of Uranium (VI) Ion on OenNdien Resin with Styrene Hazardous Material
Kim, Joon-Tae ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 697~702
Ion exchange resins have been synthesized from chloromethylated styrene-1,4-divinylbenzene (DVB) with 1%, 2%, 5% and 15%-crosslinkage and macrocyclic ligand of
by copolymerization. The adsorption characteristics of uranium (
), potassium (
) and neodymium (
) metallic ions have been investigated. The synthesis of these resins was confirmed by content of chlorine, element analysis, and IR-spectrum. The effects of pH, time, and crosslinkage on adsorption of metallic ions were also studied. The uranium ion showed the fast adsorption on the resins above pH 3. The optimum equilibrium time for the adsorption of metallic ions was about two hours. The adsorption selectivity determined in methanol solution was in increasing order uranium (
) > potassium (
) > neodymium (
) ion. Moreover, the adsorption was increased with the crosslinkage concentration in order of 1%, 2%, 5% and 15%-crosslinkage resin.
Numerical Analysis of Concentration Polarization for Spacer Configuration in Plate Type Membrane Module
Shin, Ho Chul ; Chung, Kun Yong ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 703~710
As the spacer in the membrane module provide the channel space to flow the feed solution smoothly and induce the flow turbulence, it could help to reduce both the concentration polarization and to take the long-term operation of membrane modules with high permeate flux by mixing the accumulated contaminants on the membrane surface into the bulk solution. In this study, the concentration distribution in membrane module with respect to the spacers which have the cross-sectional shapes of circle, cross, diamond and hexagon, the angles of spacer configuration, solute rejection and permeate flux were interpreted and optimized numerically using the "COMSOL Multiphysics" software. The concentration on the membrane surface was kept the lowest level for the cross-shape among the above four types of spacers. Also the 30 degree spacer configuration was showed as the most efficient case. The concentrations on the membrane surface at the module outlet for without spacer and the cross shape with the 30 degree spacer configuration were 2.09 and 1.29 times higher than those at inlet, respectively. The reduction effect of concentration polarization increased rapidly as the permeate flux increased.
Simulation Study of Capacitively Coupled Oxygen Plasma with Plasma Chemistry including Detailed Electron Impact Reactions
Kim, Heon Chang ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 711~717
Two dimensional simulation results of a capacitively coupled oxygen plasma in a cylindrical reactor geometry are presented. Detailed electron impact reaction rates, which strongly depend on electron energy, are computed from collision cross sections of electrons with
and O. Through the coupling of a three moment plasma model with a neutral chemistry/transport model are predicted spatiotemporal distributions of both charged species (electron,
) and neutral species including ground states (
and O) and metastables, known to play important roles in oxygen plasma, such as
), and O(
). The simulation results clearly verify the existence of a double layer near sheath boundaries in the electronegative plasma.
A Study for Kinetics and Oxidation Reaction of Substituted Benzyl Alcohols Using 2,4'-Bipyridinium Dichromate
Kim, Young Sik ; Park, Young Cho ;
Applied Chemistry for Engineering, volume 22, issue 6, 2011, Pages 718~722
2,4'-Bipyridinium dichromate [
] was synthesized by the reaction of 2,4'-bipyridinie with chromium trioxide in
. The structure was characterized by IR and ICP analysis. The oxidation of benzyl alcohol using 2,4'-bipyridinium dichromate in various solvents showed that the reactivity increased with the increase in the order of the dielectric constant (
), in the order : cyclohexene < chloroform < acetone < N,N'-dimethylformamide. In the presence of hydrochloric acid, 2,4'-bipyridinium dichromate effectively oxidized benzyl alcohol and its derivatives (
, H, m-Br,
) in N,N'-dimethylformamide. Electron-donating substituents accelerated the reaction, whereas electron acceptor groups retarded the reaction. The Hammett reaction constant (
) was -0.65 at 303 K. The observed experimental data was used to rationalize the hydride ion transfer in the rate-determining step.