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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
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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
Selecting the target year
Hydrogen Storage Technology by Using Porous Carbon Materials
Lee, Young-Seak ; Im, Ji-Sun ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 465~472
The technologies for improving the capacity of hydrogen storage were investigated and the recent data of hydrogen storage by using various porous carbon materials were summarized. As the media of hydrogen storage, activated carbon, carbon nanotube, expanded graphite and activated carbon fiber were mainly investigated. The hydrogen storage in the carbon materials increased with controlled pore size about 0.6∼0.7 nm. In case of catalyst, transition metal and their metal oxide were mainly applied on the surface of carbon materials by doping. Activated carbon is relatively cheap because of its production on a large scale. Carbon nanotube has a space inside and outside of tube for hydrogen storage. In case of graphite, the distance between layers can be extended by intercalation of alkali metals providing the space for hydrogen adsorption. Activated carbon fiber has the high specific surface area and micro pore volume which are useful for hydrogen storage. Above consideration of research, porous carbon materials still can be one of the promising materials for reaching the DOE target of hydrogen storage.
Dynamic Behavior Study Using Videomicroscopy in Systems Containing Nonpolar Hydrocarbon Oil and
Nonionic Surfactant Solution
Bae, Min-Jeong ; Lim, Jong-Choo ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 473~478
Phase equilibrium and dynamic behavior studies were performed on systems containing
nonionic surfactant solutions and nonpolar hydrocarbon oils. The phase behavior showed an oil in water (O/W) microemulsion (
) in equilibrium with excess oil phase at low temperatures and a water in oil (W/O)
in equilibrium with excess water phase at high temperatures. For intermediate temperatures a three-phase region containing excess water, excess oil, and a middle-phase microemulsion was observed and the transition temperature was found to increase with an increase in the chain length of a hydrocarbon oil. Dynamic behavior at low temperatures showed that an oil drop size decreased linearly with time due to solubilization into micelles and the solubilization rate decreased with an increase in the chain length of a hydrocarbon oil. On the other hand, both spontaneous emulsification of water into oil phase and expansion of oil drop were observed because of diffusion of surfactant and water into oil phase. Under conditions of a 3 phase region including a middle-phase
, both rapid solubilization and emulsification of oil into aqueous solutions were found mainly due to the existence of ultra-low interfacial tension. Interfacial tensions were measured as a function of time for n-decane oil drops brought into contact with 1 wt% surfactant solution at 25
. Both equilibrium interfacial tension and equilibration time increased with an increase in the chain length of a hydrocarbon oil.
Effect of pH on Physical Properties of Triethanolamine-Ester Quaternary Ammonium Salt Cationic Surfactant System
Kim, Ji-Sung ; Lim, Jong-Choo ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 479~485
In this study, basic physical properties were measured for ASCO EQ85 cationic surfactant of triethanolamine-ester quaternary ammonium salt and effect of pH on softening performance on fabrics was investigated using zeta potential measurement and adsorption experiment by quartz crystal microbalance. The CMC of the surfactant was near 3
mol/L and the surface tension at CMC was about 40 mN/m. The interfacial tension measurement between 1 wt% aqueous solution and n-dodecane measured by spinning drop tensiometer showed that interfacial tension slightly increased with an increase in pH but the equilibration time was not affected by pH. The surfactant adsorption was found to increase with an increase in surfactant concentration and was also affected by pH of surfactant solution. The friction factor for fabrics treated with ASCO EQ85 surfactant was shown to increase with pH and better softening effect was found under acidic conditions. Half-life for foams generated with ASCO EQ85 surfactant solution increased with pH, which indicated an increase in foam stability with pH.
Wet Co-Oxidation of Quinoline and Phenol
Ryu, Sung-Hun ; Yoon, Wang-Lai ; Suh, Il-Soon ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 486~492
Wet oxidations (WO) of quinoline in aqueous solution were carried out at 225
. In the WO at 250
, quinoline was degraded completely within 30 min and the reduction in total organic carbon (TOC) of 63% was achieved during 120min. However, the rate of the reduction in TOC was only 13% within 240 min during the WO at 225
. Nicotinic and acetic acid were found to be main intermediates formed during the oxidation of quinoline. With the addition of the homogeneous catalyst
or more easily oxidizable phenol, WOs of quinoline were also carried out under moderate conditions at 200
. The catalytic WO with
of 0.20 g/L showed the destruction rates of quinoline and TOC comparable to those in the WO at 250
. The WOs of quinoline-phenol mixture exhibited induction periods to degrade quinoline and phenol during which free radicals were produced to initiate WOs. With increasing initial concentrations of phenol at a given initial concentration of quinoline, the induction periods in the destructions of quinoline and phenol became shorter and the reduction in TOC increased from 60% to 75% during 180 min of the WOs. The reduction rate of an induction period decreased as increasing the initial concentration ratio of phenol to quinoline. On the other hand, phenol degradation in the WOs of quinoline-phenol mixtures required a longer induction period and proceeded slower compared to the case of the WO of phenol.
Study on the Properties of Polystyrene and Styrenic Copolymer Containing Carbon Nanotubes and Nanoclay
Lee, Kyung-Hoon ; Kim, Young-Doo ; Lee, Min-Ho ; Min, Byong-Hun ; Kim, Jeong-Ho ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 493~499
The properties of polystyrene and styrenic copolymer nanocomposites containing carbon nanotubes (CNT) and nanoclays were studied. Polystyrene and styrenic copolymer containing styrene and vinylbenzyl trimethylammonium chloride (SVTAC) were synthesized by emulsion polymerization. Polystyrene/CNT/clay and SVTAC/CNT/clay nanocomposites with various concentrations of CNT and different types of clay were prepared via mixing of polystyrene emulsion and clay. SVTAC/CNT nanocomposites showed a better electrical conductivity than PS/CNT nanocomposites. Nanocomposites with more surfactant during polymerization showed a better electrical conductivity than the ones with less surfactant. These indicated the positive effect of comonomer and surfactant on the electrical conductivity. Transmission electron microscopy (TEM) was used to analyze the state of CNT dispersion. TEM results showed that CNT loading, comonomer composition and amount of surfactant affected the final dispersion of CNT in nanocomposites. In order to confirm the effects of CNT loading, comonomer composition and the amount of surfactant on the thermal and dynamic mechanical properties, DSC and DMA analyses were conducted.
Electromagnetic Wave Absorption Properties of NiCuZn Ferrite
Park, Chan-Kyu ; Kim, Ki-Tae ; Chang, Sang-Mok ; Lee, Sang-Rok ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 500~504
NiCuZn Ferrites, known as preventing EMI/EMC, were prepared and their properties were investigated based on the chemical composition ratio, sintering temperature, and mean particle size. The NiCuZn ferrite made of Fe2O3 49.0 mol%, NiO 9.0 mol%, CuO 8.0 mol%, ZnO 34.0 mol% could be applied at the largest range of electromagnetic wave. The optimal calcination and sintering temperature were 900
, respectively. The electromagnetic wave loss capacity of its mean particle size 1.12
was superior to others examined.
The Effect of Fluorine Based Emulsion on the Watertightness Properties of Portland Cement
Kang, Hyun-Ju ; Song, Myong-Shin ; Song, Su-Jae ; Park, Su-Haeng ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 505~510
It is well known that the properties of concrete such as the compressive strength, water permeability, water tightness and durability are affected by micro-structure in hardened cement paste. Especially, for durability of concrete, watertightness of cementitious materials is the most critical property among various properties. Recently, many types of material such as organic and/or inorganic materials are used for watertightness of concrete. In this study, we examined the effect of fluorine-based emulsion on watertightness property. And we also discussed the change of microstructure and formation of hydrates in hardened cement paste by the addition of fluorine-based emulsion. Cement paste with fluorine-based emulsion showed improvement of watertightness by the surface activation of cement paste and by formation of
fine crystals in cement pore structure.
Photodegradation Characterization of Polyolefin Composite
Weon, Jong-Il ; Shin, Sei-Moon ; Choi, Kil-Yeong ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 511~516
Photodegradation characteristics of polyolefin composites were studied. Thermogravimetric analysis results suggest that the polyolefin blends used in this study have different amounts of talc. The mechanical behaviors of polyolefin blends, which experienced UV-irradiation in accordance with SAE J1960, are investigated using tensile and Izod impact tests. These results show that as the UV-exposure time increases, a significant drop in the elongation at break and impact strength at a low temperature are observed. This may be explained by the decreases in elastic energy derived from the scission of polymer molecular chains and the low density of entanglement after UV- photodegradation. Scanning electron microscopy observations indicate that no crack and surface damage are observed, while the additional talc particles are exposed, on the UV-exposed surfaces. The exposure of talc particles may be responsible for the discoloration of UV-exposed polyolefin blend surface. Observation using Fourier transform infrared spectroscopy (FT-IR) confirms the presence of photodegradation on the surface of UV-exposed polyolefin blend.
Production of Bio-ethanol from Brown Algae by Physicochemical Hydrolysis
Lee, Sung-Mok ; Kim, Jae-Hyeok ; Cho, Hwa-Young ; Joo, Hyun ; Lee, Jae-Hwa ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 517~521
In this study, the productivity of bio-ethanol obtained from various brown-algae raw materials was examined. Brown-algae polysaccharide, consisting of alginate and laminaran, is usable for the effective production of bio-ethanol if it is hydrolyzed to monomer unit. The objective of this study is the production of bio-ethanol from brown-algae using a heat-treatment and acid-treatment. Bio-ethanol was produced by Saccharomyces cerevisiae KCCM1129 and Pachysolen tannophilus KCTC 7937 strains. Laminaran japonica was higher than Sagassum fulvellum and Hizikia fusiformis, Laminaran japonica optimum pre-treatment is used to derive the ethanol production of Saccharomyces cerevisiae KCCM1129 and Pachysolen tannophilus KCTC 7937 respectively 9.16 g/L, 9.80 g/L. The maximum output of Sargassum fulvellum and Hizikia fusiformis was very low as 0.22 g/L.
A Study on Catalysts for Simultaneous Removal of 1,2-Dichlorobenzene and NOx
Park, Kwang-Hee ; Hong, Sung-Chang ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 522~526
The catalytic oxidation of 1,2-dichloribenzene (1,2-DCB) and simultaneous catalytic reduction of nitrogen oxides over the single catalyst has been investigated over various metals (Ru, Mn, Co and Fe) supported on
. The activity of the different catalysts for catalytic oxidation of 1,2-dichloribenzene depended on the used metal, Ru/Co/
, Mn-Fe/CeO2 and Cr/
(commercial catalysts) being the most actives ones. In the catalytic oxidation of chlorobenzene (CB), Ru/Co/
is better than Pt-Pd/
, which is the well-known catalyst good for VOC oxidation. Furthermore, it has a good durability on the deactivation by
and sulfur. For nitrogen oxides (NOx) removal, NOx conversion was 70% at 260
Preparation of Poly(ethylene oxide)/Periodic Mesoporous Organosilica Composite
Li, Dun ; Sur, Gil-Su ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 527~531
Periodic mesoporous organosilicas (PMO) were synthesized using bis(triethoxy silyl) benzene as the precursor and dodecyl trimethyl ammonium bromide (DTMA) as the templating agent. From these results of XRD, TEM, and NMR, the pore structure of the material was confirmed to have a well-organized hexagonal structure. Poly(ethylene oxide) (PEO) was penetrated into PMO. From the DSC and XRD experiments, the polymer melting transition of crystalline polyethylene oxide (PEO) decreased then finally disappeared. These results prove that the polymer chains penetrate into the PMO channels, and penetrated polymer chains are constrained inside channels of PMO.
The Effect of Ultrasonic Energy on Esterification of Vegetable Oil
Lee, Seung-Bum ; Lee, Jae-Dong ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 532~535
In this study, the fatty acid methyl ester was prepared from the vegetable oil by inducing ultrasound energy. The ultrasound energy was applied to the esterification reaction for heating and stirring effects. Ultrasonic induction results in the shortened reaction time and brings the increase of the methyl ester yield. However, the continuous introduction of ultrasound during the esterification reaction results in temperature increase, then the over-heating of reaction temperature was ineffective. Therefore, the system temperature was controlled at constant temperature state with the cooling circulation. The ultrasound induction reaction had the fatty acid methyl ester yield of 93% at the reaction time was 30 minutes, faster than the traditional esterification process.
XPS Analysis of Acrylic Acid Films Polymerized by Remote Plasma-Enhanced Chemical Vapor Deposition
Kim, Seong-Hoon ; Seo, Moon-Kyu ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 536~541
Plasma-polymerized acrylic acid films were deposited on Si wafer and KBr pellet by remote plasma-enhanced chemical vapor deposition (PECVD). Effects of plasma power, reaction pressure, indirect plasma method on the growth rate, chemical structure, and chemical bonding state of the films were investigated. Chemical structure and chemical state of the films were characterized by Fourier transformed infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) analysis and curve fitting technique. Growth rate of the film increased to a saturation value with plasma power of 100 W, but showed the maximum with reaction pressure at 300 mtorr. Whenever W/FM factor (applied energy per gas molecule) increased by increasing plasma power or lowering pressure, the fragmentation of acrylic acid molecules was promoted. From the XPS curve fitting analyses, we found that the intensity of carboxyl COO bonding peak decreased with W/FM factor, and the tendency of intensity change of carboxylic COO peak was contrary to those of ether C-O and carbonyl C=O peaks.
Methane Production Using Peel-type Fruit Wastes and Sewage Sludge in Batch Anaerobic Digestion Process
Jeong, Tae-Young ; Lee, Jong-Hak ; Chung, Hyung-Keun ; Cha, Hyung-Joon ; Choi, Suk-Soon ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 542~546
Methane production using the mixed organic wastes of peel-type fruit wastes from apple or orange and sewage sludge was investigated in the batch anaerobic degradation process. When apple or orange peels with sewage sludge were used as mixed substrates, higher methane production was achieved under the condition of 3 : 7 (fruit peel : sewage sludge) mixing ratio. However, above the 3 : 7 mixing ratio, the pH of mixture was decreased from 8.0 to 4.5∼4.7 due to organic acid production from the fruit wastes. Subsequently, methane production was low. The results in this study could be effectively applied to the methane gas production system as a bioenergy in the mixed batch anaerobic digestion process using the peel-type fruit wastes and sewage sludge.
System Development of Removing Dust and Odor from Manufacturing Process of FRP Products
Yun, Huy-Kwan ; Kim, Jae-Yong ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 547~552
When fiber reinforced plastics (FRP) products are manufactured, dust and odor materials are inevitably generated in a workplace. To improve the bad condition of the workshop, we developed the Hybrid Bag Filter attached activated carbon fiber (ACF) and installed the system at two companies producing FRP goods. In order to raise the efficiency of dust collection, we set the ducts both on the ceiling and at the bottom of the wall and according to the circumstances of the workshop's space, moving dust collector also adopted as a different type of flexible duct. Pulse Jet Type Bag Filter is also equipped to operate the system more effectively, for the improved fine environment because of high dust removal efficiency. Finally, we investigated the removal tendency of the dust and odor when operating the System of Hybrid Bag Filter.
Low Temperature Pyrolysis for the Recovery of Value-added Resources from Waste Wire (II)
Han, Seong-Kuk ; Kim, Jae-Yong ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 553~556
This research aims at the recovery of valuable resource and more efficient waste treatment through solving the problem of pyrolysis technique. At first, in order to raise the economical efficiency, the low temperature pyrolysis experiment was carried out at the temperature of 450
, which is lower than the common pyrolysis temperature area (500∼1000
). We could lower the reaction temperature and reduce the reaction time by using catalyst. Also we used indirect heat for the purpose of maintaining favorable anoxic condition. As a result, we could raise the recovery rate of the valuable copper and synthetic fuel oil. Furthermore, the by-products and flue gas could be treated more effectively as well. The flue gas passed through two stage neutralization tank, so that dioxin hardly occurs and other environment items are controlled fairly well to the environmental standard. Throughout this study, we produced the low temperature pyrolysis equipment (GTPK-001) as mentioned above, and we found out that the technique can be commercialized economically as well as environmentally friendly.
Glass Thinning by Fluoride Based Compounds Solution with Low Hydrofluoric acid Concentration
Kim, Ho-Tae ; Gang, Dong-Goo ; Kim, Jin-Bae ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 557~560
In this study, a new wet etching method and the solution for thinning the glass with the thickness below 100
were investigated. For the preparation of etching solution with low hydrofluoric acid, it was effective to use $NH_4F$ or $NH_4HF_2$ as a main ingredient with the addition of sulfuric acid or nitric acid. Influence of the composition of mixed acid solution and the temperature on the etching rate was investigated. The addition of anionic surfactant provides the function to prevent the adhesion of sludge generated by the etching reaction. A new wet etching pilot device equipped with streaming generation parts was used to test etching of commercial non-alkali glass and soda lime glass. The non-alkali glass with the thickness of 640
and soda lime glass with the thickness of 500
were etched to 45
, respectively, by using the pilot device. After the etching by pilot device, the roughness degree of the glass surface was maintained at 0.01∼0.02
Cabin Air Filter Media Produced by Needle Punching Process
Park, Seung-Kyu ; Kim, Heon-Chang ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 561~564
Filter media finely interspersed with activated carbons were prepared by a needle punching process without using chemical binders. Their characteristics were investigated efficiently to abate environmentally harmful gas such as acetaldehyde, and were compared with those of cabin air filter coated with activated carbons by using chemical binders. These combination filters were installed on a vehicle fan placed in a test chamber of capacity similar to the interior volume of a commercially available passenger car, and the efficiency of acetaldehyde abatement was measured as a function of time. The filter utilizing chemical binders showed somewhat better performance for the elimination of acetaldehyde despite the adverse effect of the chemical binder that would clog the micropores of the activated carbons. It turned out that the needle punching process had the activated carbons agglomerated due to hydrophobic interactions, resulting in a relatively larger void area than that of the filter utilizing chemical binders.
Formation and Characterization of Green and Blue Phosphor Nano Powders
Kwon, Oh-Sung ; You, Young-Chul ; Kim, Sang-Min ; Kim, Ki-Do ; Lim, Hyung-Sup ; Kim, Hee-Taik ;
Applied Chemistry for Engineering, volume 20, issue 5, 2009, Pages 565~569
Nano-sized green and blue phosphor powders were synthesized by liquid phase method to confirm the size and morphology. By using that process, the particle sizes of green and blue phosphor particles were 80 nm and 60 nm, respectively. The characteristic comparison of
: Mn and BAM : Eu was carried out and as a result,
: Mn powders showed an higher PL performance compared to BAM : Eu.