Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Applied Chemistry for Engineering
Journal Basic Information
Journal DOI :
The Korean Society of Industrial and Engineering Chemistry
Editor in Chief :
Volume & Issues
Volume 24, Issue 6 - Dec 2013
Volume 24, Issue 5 - Oct 2013
Volume 24, Issue 4 - Aug 2013
Volume 24, Issue 3 - Jun 2013
Volume 24, Issue 2 - Apr 2013
Volume 24, Issue 1 - Feb 2013
Selecting the target year
Electrochemical Ceramic Membrane Reactors
Uhm, Sunghyun ; Park, Jae Layng ; Seo, Minhye ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 337~343
Membrane reactors have been showing a promising future and attracted increasing attention in the scientific community as they possess advantages in terms of enhanced catalytic activity and selectivity, combination of processes (reaction and separation), simplicity in process design, and safety in operation. In particular, solid electrolyte membrane reactor principles are realized in fuel cells, electrolyzers and reactors for hydrogenation of carbon dioxide and other economically viable reactions. In this review, as a young generation of ion conducting materials, high temperature proton conductors are discussed in terms of the current status of material development and their various applications.
Recent Instantiation Case of Lead Acid Battery for Energy Storage Systems
An, Sang-Yong ; Jung, Ho-Young ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 344~349
Energy storage system is an energy reservoir which can store the electrical energy produced by the power plant into the chemical energy at the time whenever it needs to use. Accordingly, the energy storage system can help to improve the energy utilization efficiency and the stabilization of the power supply system. In addition, it can cope with the issues of carbon dioxide reduction and depletion of fossil fuel. Lead-acid battery in the secondary battery fields is one of the most developed technologies. It is also economical, reliable storage device. Therefore, the instantiation case of energy storage system using lead-acid battery was investigated for the reference studies.
The Dissolution of Magnesium and Iron from Ferronickel Slag Depending on Aging Condition
Kim, Eun-Young ; Choi, Sang-Won ; Kim, Viktor ; Li, Yujia ; Park, Ji-Hyun ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 350~356
Dissolution of ferronickel slag depending on aging condition was studied. Ferronickel slag typically contains 54.05%
, 34.33% MgO, and 5.51%
. The main structure composite was similar to Enstatite [(Mg,
]. Ferronickel slag aging was made in 3 months under various experimental conditions, in water, bubbling water and wetting air. The most effective aging condition was the wetting air treatment. In this condition, the dissolving concentration of Mg and Fe was 80.0% and 75.1% respectively. The XRD and SEM data revealed that the wetting air condition also showed the biggest structural damage.
HEPA Filter Tests Using PLS and Composite Nanospheres
Hwang, Min-Jin ; Sung, Dong Chan ; Moon, Hee ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 357~362
Monodispersed polystyrene latex spheres (PLS) and PS-MPS/silica composite nanospheres were used to test high efficiency particulate air (HEPA) filters. Prior to filter tests, all nanospheres used in this work were characterized by measuring their average particle diameters and coefficients of variation (CV) for assessing them as artificial dusts. The average particle sizes of PLS and composite nanospheres could be well controlled in the range of 100~300 nm well by changing reaction temperature and the amount of a stabilizer during emulsion polymerization. The CV of all nanospheres were also in the range of 3~7%, lower than 15% that is the criterion for monodispersed particle distributions. Furthermore the results of HEPA filter tests show that all nanospheres used were quite proper as artificial dusts for testing air filters.
Effects of Crack Resistance Properties of Ozone-treated Carbon Fibers-reinforced Nylon-6 Matrix Composites
Han, Woong ; Choi, Woong-Ki ; An, Kay-Hyeok ; Kim, Hong-Gun ; Kang, Shin-Jae ; Kim, Byung-Joo ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 363~369
In this work, the effects of ozone treatments on mechanical interfacial properties of carbon fibers-reinforced nylon-6 matrix composites were investigated. The surface properties of ozone treated carbon fibers were studied by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). Mechanical interfacial properties of the composites were investigated using critical stress intensity factor (
). The cross-section morphologies of ozone-treated carbon fiber/nylon-6 composites were observed by scanning electron microscope (SEM). As a result,
of the ozone-treated carbon fibers-reinforced composites showed higher values than those of as-received carbon fibers-reinforced composites due the enhanced
ratio of the carbon fiber by the ozone treatments. This result concludes that the mechanical interfacial properties of nylon-6 matrix composites can be controlled by suitable ozone treatments on the carbon fibers.
Preparation and Characterization of Polyacrylonitrile-based Porous Carbon Nanofibers Activated by Zinc Chloride
Lee, Hye-Min ; Bae, Kyong-Min ; Kang, Hyo-Rang ; An, Kay-Hyeok ; Kim, Hong-Gun ; Kim, Byung-Joo ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 370~374
The effects of zinc chloride addition on pore development of porous carbon nanofibers prepared by polyacrylonitrile (PAN)/ N,N'-dimethylformamide (DMF) (10 wt%) electrospinning were investigated. The change of morphological and structural modification by zinc chloride activation was investigated by a scanning electron microscopy (SEM) analysis.
adsorption isotherm characteristics at 77 K were confirmed by Brunauer-Emmett-Teller (BET) and Horvath-Kawazoe (H-K) equations, and the curves showed the Type I mode in the International Union of Pore and Applied Chemistry (IUPAC) classification, indicating that lots of micropores exist in the sample. In addition, specific surface areas and total pore volumes of porous carbons prepared by the zinc chloride activation were determined as 600~980
, respectively. As experimental results, many holes or demolished structures were found on the fiber surfaces after the zinc chloride activation as confirmed by a SEM analysis. It was also observed that various pore sizes were found to be depended on the adding content of zinc chloride in PAN/DMF solution in this system.
A Study on Reaction Kinetics in Steam Reforming of Natural Gas and Methane over Nickel Catalyst
Seong, Minjun ; Lee, Young-Chul ; Park, Young-Kwon ; Jeon, Jong-Ki ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 375~381
Kinetics data were obtained for steam reforming of methane and natural gas over the commercial nickel catalyst. Variables for the steam reforming were the reaction temperature and partial pressure of reactants. Parameters for the Power law rate model and the Langmuir-Hinshelwood model were obtained from the kinetic data. As a result of the reforming reaction using pure methane as a reactant, the reaction rate could be determined by the Power law rate model as well as the Langmuir-Hinshelwood model. In the case of methane in natural gas, however, the Langmuir-Hinshelwood model is much more suitable than the Power law rate model in terms of explaining methane reforming reaction. This behavior can be attributed to the competitive adsorption of methane, ethane, propane and butane in natural gas over the same catalyst sites.
Preparation of Foamed Glass Block from Recycled Soda-lime-silicate Glasses by Chemical Composition Control
Kim, Jung-Min ; Lee, Chul-Tae ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 382~390
Foaming process of waste soda lime glasses by just chemical composition control of vitreous feed materials was investigated to find a novel and efficient recycling process. For the chemical composition control of feed materials, 10 wt. parts of
, 0.5 wt. parts of
, 3.0 wt. parts of
, and 0.3 wt. parts of carbon black as the foaming agent were mixed with 100 wt. parts of soda-lime vitreous feed powder. Proper conditions for foaming process in tunnel kiln are the foaming temperature of
, the foaming time of 30~35 min, and the vitreous feed powder particle size of -325 mesh. Properties of foamed glass blocks obtained under these foaming conditions showed the density of
, thermal conductivity of
, moisture absorption of 1.1~1.5%, and compressive strength of
Preparation of ZnO Nano Powder and High-transparent UV Shielding Dispersion Sol
Lee, Hun Dong ; Kim, Jin Mo ; Son, Dae Hee ; Lee, Seung-Ho ; Park, Seong Soo ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 391~395
In this study, zinc oxide (ZnO) nano powder, well known as an UV absorbing material, was synthesized with three synthetic conditions by the hydrothermal method. After ZnO nano powder was surface-modified with various silane coupling agents to improve dispersion property, a dispersion sol was prepared with dispersant for 72 h by the ball-milling of surface-modified ZnO nano powder. The dispersion sol, prepared by modifying the surface of the ZnO nano powder with an average size of about 30 nm using 3-chloropropyl trimethoxy silane, showed an excellent dispersion stability with a high UV-shielding and visible trnasparency.
Synthesis and Photovoltaic Properties of New π-conjugated Polymers Based on Benzo[1,2,5]thiadiazole
Bea, Jun Huei ; Lim, Gyeong Eun ; Kim, Joo Hyun ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 396~401
Alternating copolymers, poly[9-(2-octyl-dodecyl)-9H-carbazole-alt-4,7-di-thiophen-2-yl-benzo[1,2,5]thiadiazole] (PCD20TBT) and poly[9,10-bis-(2-octyl-dodecyloxy)-phenanthrene-alt-4,7-di-thiophen-2-yl-benzo[1,2,5]thiadiazole] (PN40TBT), were synthesized by the Suzuki coupling reaction. The copolymers were soluble in common organic solvents such as chloroform, chlorobenzene, 1,2-dichlorobenzene, tetrahydrofuran and toluene. The maximum absorption wavelength and the band gap of PCD20TBT were 535 nm and 1.75 eV, respectively. The maximum absorption wavelength and the band gap of PN40TBT were 560 nm and 1.97 eV, respectively. The HOMO and the LUMO energy level of PCD20TBT were -5.11 eV and -3.36 eV, respectively. As for PN40TBT, the HOMO and the LUMO energy level of PCD20TBT were -5.31 eV and -3.34 eV, respectively. The polymer solar cells (PSCs) based on the blend of copolymer and PCBM (1 : 2 by weight ratio) were fabricated. The power conversion efficiencies of PSCs based on PCD20TBT and PN40TBT were 0.52% and 0.60%, respectively. The short circuit current density (
), fill factor (FF) and open circuit voltage (
) of the device with PCD20TBT were
, 38.2% and 0.69 V. For PN40TBT, the
, FF, and
, 42.9%, and 0.79 V, respectively.
Preparation of Pitch for Melt-electrospinning from Naphtha Cracking Bottom Oil
Kim, Jinhoon ; Lee, Sung Ho ; Lee, Young-Seak ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 402~406
In this study, a pitch for melt-electrospinning was prepared from naphtha cracking bottom (NCB) oil by the modification with heat treatment. The softening point and property of the modified pitch was influenced by modification conditions such as nitrogen flow rate, heat treatment temperature, and reaction time. Among these, the heat treatment temperature had a very strong influence on the distribution of molecular weight and softening point of the pitch. The C/H mole ratio and average molecular weight increased with increasing the heat treatment temperature due the decomposition and cyclization reaction of surface-functional groups. In addition, the values of benzene insoluble and quinoline insoluble also tends to decrease, and the width of molecular weight distribution seems to get more narrow. The carbon fiber with a diameter of
was prepared from a modified pitch at the softening point of
by melt-electrospinning. It is believed that the melt-electro spinning method is much more convenient to get the thinner fiber than the conventional melt spinning method.
Isolation and Culture Conditions of Hydrogen-producing Bacterium from Sewage Sludge
Woo, Dae-Sik ; Joo, Hyun ; Lee, Jae-Hwa ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 407~411
Hydrogen producing bacterium, strain AS12 was isolated from the sludge of the anaerobic wastewater treatment process of south sewage treatment plant, Busan city. Phylogenetic analysis based on 16S rRNA sequence studies indicated that AS12 belonged to the genus Escherichia coli sp.. The optimum temperature and pH for hydrogen production were
and 8.0, respectively. The impact of the types and concentrations of carbon and nitrogen sources in the media on hydrogen production was investigated. The optimum carbon and nitrogen concentrations were 10 g/L of galactose and 5 g/L of peptone, respectively.
Development of Hexafluoropropylene Hydrogenation with Pd/C Particles Prepared with 1-Hexyl-3-methylimidazolium Tetrafluoroborate
Jeong, Ji Baek ; Yoo, Kye Sang ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 412~415
Palladium on carbon powder was prepared using 1-hexyl-3-methylimidazolium tetrafluoroborate, one of room temperature ionic liquids. The synthesized particles were tested as a hexafluoropropylene hydrogenation catalyst. Moreover, the hydrogenation was performed under various reaction conditions to develop an optimum reaction process. The catalyst prepared by more than 3 wt% of palladium and the unity mole ratio of ionic liquid to palladium precursor showed higher catalytic activity. For reaction conditions, the complete hexafluoropropylene (HFP) conversion was achieved at these conditions; the volume flow ratio of hydrogen to HFP was higher than 1.25 and
was lower than 50000 mL/g-h.
Antibacterial Properties of Silver-alginate/PVP Nanofiber
Choi, Yoo-Sung ; Min, Kyung-Du ; Yoon, Doo-Soo ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 416~422
In order to incorporate silver ions into the alginate, silver-alginate was prepared with aqueous solutions of silver nitrate. In the study, the silver-alginate was prepared by blending with poly vinylpyrrolidone solutions and the electrospinning was performed by using this blend solution. Antibacterial properties of silver-alginate/PVP solutions were estimated for Escherichia coli and Staphylococcus aureus by the colony counting test. Electrospinning conditions of silver-alginate/PVP solution were the tip-to-collector distance of 22 cm, the flow rate of the solution at 0.01 mL/min, and the voltage at 26 kV. The form and size of silver-alginate/PVP nanofibers were estimated by SEM and Image J. The average diameter of the electrospun SA5P15 fibers was 124 nm and showed a narrow diameter distribution. The reduction of bacteria for SA5P15 exhibited 99.9% after 24 h.
Inhibitory Effects of Toxic Materials on Activation of Microorganisms in Coke Plant Wastewater
Kim, Sang-Sik ; Lee, Kisay ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 423~427
This research was carried out to identify the characteristics of the wastewater from coke oven gas (COG) purification process of the coke plant, and derive optimal operating conditions for the treatment of wastewater. The coke plant wastewater contains highly concentrated
that are harmful to microorganisms, and their concentrations were 6.8~11.2 mg/L and 190~320 mg/L, respectively. When the
ion concentration was lower than 10 mg/L,
of active sludge was 280~ 340 mL and the sludge sedimentation velocity was very fast. But, when the
ion concentration was higher than 15 mg/L,
of the active sludge was 560~680 mL and the sludge sedimentation velocity was very slow. Also when the
ion concentration was lower than 300 mg/L,
of the active sludge was 245~320 mL and the sludge sedimentation velocity was very fast. But, when the
ion concentration was higher than 400 mg/L,
of the active sludge was 470~ 567 mL and the sludge sedimentation velocity was slow. To treat the wastewater generated by COG purification process of the coke plant effectively and to maintain microorganism activities in good conditions, the ion concentration of
should be lower than 15 mg/L and 400 mg/L, respectively.
Removal of Lead Ions from Aqueous Solution Using Juniperus chinenensis Waste
Choi, Suk Soon ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 428~432
From the forest areas in Chungbuk, large amounts of wood wastes by pruning are generated, however most of them considered as by-products are not treated properly with no disposal options. In this work, among diverse wood wastes such as Quercus variabillis, Juniperus chinensis, Larix kaemoferi, and Pinus densiflora, Juniperus chinensis was found to be more effective biosorbent for the removal of lead ions than other wood wastes. Also, the enhancement of lead removal efficiency from the aqueous phase was investigated using Juniperus chinensis waste. It was observed that the optimal initial pH to increase the removal efficiency of 20 mg/L lead ions was 4.0 and the optimal dosage concentration with regard to the biosorbent for the enhanced removal of 50 mg/L lead ions was 0.6 g/100 mL. In addition, chemical treatment of Juniperus chinensis waste with sulfuric acid was required to improve the adsorption capacity for high lead concentrations (over 100 mg/L). When Juniperus chinensis waste was chemically treated with 6 M sulfuric acid, the adsorption quantities of lead ions were 180, 340, and 425 mg/g with regard to 200, 400, and 500 mg/L lead ions concentrations, respectively. These results indicate that the practical biosorbent technology developed in this study is a highly efficient method to treat the lead ion from an aqueous solution.
Electrical Discharge Plasma in a Porous Ceramic Membrane-supported Catalyst for the Decomposition of a Volatile Organic Compound
Jo, Jin-Oh ; Lee, Sang Baek ; Jang, Dong Lyong ; Mok, Young Sun ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 433~437
Electrical discharge plasma created in a multi-channel porous ceramic membrane-supported catalyst was applied to the decomposition of a volatile organic compound (VOC). For the purpose of improving the oxidation capability, the ceramic membrane used as a low-pressure drop catalyst support was loaded with zinc oxide photocatalyst by the incipient wetness impregnation method. Alternating current-driven discharge plasma was created inside the porous ceramic membrane to produce reactive species such as radicals, ozone, ions and excited molecules available for the decomposition of VOC. As the voltage supplied to the reactor increased, the plasma discharge gradually propagated in the radial direction, creating an uniform plasma in the entire ceramic membrane above a certain voltage. Ethylene was used as a model VOC. The ethylene decomposition efficiency was examined with experimental variables such as the specific energy density, inlet ethylene concentration and zinc oxide loading. When compared at the identical energy density, the decomposition efficiency obtained with the zinc oxide-loaded ceramic membrane was substantially higher than that of the bare membrane case. Both nitrogen and oxygen played an important role in initiating the decomposition of ethylene. The rate of the decomposition is governed by the quantity of reactive species generated by the plasma, and a strong dependence of the decomposition efficiency on the initial concentration was observed.
Formation Mechanism of Pores in Ni-P Coated Carbon Fiber Prepared by Electroless Plating Upon Annealing
Ham, Seung Woo ; Sim, Jong Ki ; Kim, Young Dok ;
Applied Chemistry for Engineering, volume 24, issue 4, 2013, Pages 438~442
In the present work, electroless plating was used for coating thin films consisting mainly of Ni and P on carbon fiber. Structural changes appeared upon the post-annealing at various temperatures of the Ni-P film on carbon fiber was studied using various analysis methods. Scanning, a flat surface structure of Ni-P film on carbon fiber was found after electroless plating of Ni-P film on carbon fiber without post-annealing, whereas annealing at
resulted the formation of porous structures. With increasing the annealing temperature to
with an interval of
, the pore size increased, but the density decreased. X-ray diffraction (XRD) showed the existence of metallic Ni, and Ni-P compounds before post-annealing, whereas the post-annealing resulted in the appearance of NiO peaks, and the decrease in the intensity of the peak of metallic Ni. Using X-ray photoelectron spectroscopy (XPS), phosphorous oxides were detected on the surface upon annealing at
, which can be attributed to the phosphorous compounds originally existing in the deeper layers of the Ni films, which undergo sublimation and escape from the film upon annealing. Escape of phosphorous species from the bulk of Ni-P film upon annealing could leave a porous structure in the Ni films. Porous materials can be of potential applications in diverse fields due to their interesting physical properties such as high surface area, and methods for fabricating porous Ni films introduced here could be easily applied to a large-scale production, and therefore applicable in diverse fields such as environmental filters.