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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 23, Issue 6 - Dec 2012
Volume 23, Issue 5 - Oct 2012
Volume 23, Issue 4 - Aug 2012
Volume 23, Issue 3 - Jun 2012
Volume 23, Issue 2 - Apr 2012
Volume 23, Issue 1 - Feb 2012
Selecting the target year
Physicochemical Behaviors of Oxygen and Sulfur in Li Batteries
Park, Dong-Won ; Kim, Jin Won ; Kim, Jongwon ; Lee, Jaeyoung ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 247~252
Of late, the development of advanced batteries with high power density and capacity has been indispensible for pushing ahead with much wider applications to electric vehicles and smart IT devices. However, a conventional Li-ion battery contains a limited energy density due to various technological challenges such that other types of Li batteries including Li-S and Li-air have been extensively studied due to their interestingly high energy capacities. Sulfur and oxygen, of which both are cathode materials, showing similar physicochemical characteristics have widely been available which may also contribute to the commercialization of these batteries. In this review, we introduce some perspectives in improving these advanced Li batteries through several approaches such as the provision of porous cathode structures, the optimization of cathode-electrolyte interfaces and the modification of Li anodes.
A Study on the Simultaneous Oxidation of
and CO over
Lee, Hyun Hee ; Jang, Du Hun ; Hong, Sung Chang ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 253~258
The effects of active sites and valence states were investigated over
catalyst on simultaneous oxidation of
and CO. The Pd species (PdO) crystallite size increased with increasing Pd loadings, which results in enhancement of the activity of
oxidation. Different results from the activity of
and CO oxidation were shown to be dependent on the Pd valence state on the surface of the catalyst prepared through a thermal treatment. XRD and
analysis confirmed that
species was predominated in the calcination catalyst, while
species was predominated in the reduction catalyst. Additionally, it could be found that the valence state of Pd was a more important factor on the catalytic activity than that of factors as the surface area and pore volume. The reaction mechanism of
and CO followed by the valence state of Pd could be identified using FT-IR analysis.
An Experimental Study on the Compressive Strength Properties of Sulfur-solidified Materials using Bottom Ash Fine Aggregate
Hong, Bumui ; Choi, Changsik ; Yun, Jungho ; Eom, Minseop ; Jeon, Sinsung ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 259~265
Differently from fly ash, the bottom ash produced from thermal power generation has been treated as an industrial waste matter, and almost reclaimed or was applied with the additive of the part concrete. Bottom ash has various problems to use with the aggregate. Bottom ash is lighter than typically the sand or the gravel and it's physical properties (compressive strength etc.) is somewhat low because of high absorptance. In order to manufacture the ash concrete, we used a bottom ash as a main material and a pure sulfur as a binder. In this study, fundamental research methods that vary the grain-size of bottom ash and the ratio of sulfur vs ash were investigated to improve the quality of ash concrete such as compressive strength. Bottom ash in this research which occurs from domestic 4 place power plants, was checked physical and chemical properties. The compressive strength seems the result which simultaneously undergoes an influence in content of the sulfur and Bottom ash grain-size. We got the result of the maximum 92 MPa. The compressive strength was high result for grain size below 1.2 mm and high sulfur content.
Comparison of Colorless and Transparent Polyimide Films with Various Amine Monomers
Kim, Youngmin ; Chang, Jin-Hae ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 266~270
A series of polyimide was prepared by reacting 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) as the anhydride monomer and 2,2'-bis(trifluoromethyl)benzidine (TFB), 2,2'-bis(3-aminophenyl)hexafluoropropane (BAFP), 2,2'-bis(3- amino- 4-methylphenyl) hexafluoropropane (BAMF), bis(3-aminophenyl)sulfone (APS), p-xylyenediamine (p-XDA), or m-xylyenediamine (m-XDA) as the amine monomer in N,N-dimethylacetamide (DMAc). Colorless and transparent polyimide (PI) films were obtained by casting the poly(amic acid)s (PAAs) solution at various heat treatment temperatures. The thermal properties of the PI films were examined using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and thermomechanical analysis (TMA) and the mechanical properties were investigated using universal tensile machine (UTM), Their optical transparencies were also investigated using ultraviolet-visible (UV-vis.) spectrophotometry and colorimetry. The yellow index (YI) and coefficient of thermal expansion (CTE) values of all PIs were in the range 0.98~2.76 and 25.73~55.23
Synthesis and Characterization of Mica Coated with Zinc Oxide Nanoparticles
Kil, Hyun Suk ; Kim, Young Ho ; Park, Minyoung ; Rhee, Seog Woo ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 271~278
In this work, we have prepared the nanocomposite by the reaction of mica and zinc oxide, and investigated the application of nanocomposite to UV protecting creams. Mica treated with 3-aminopropyltrimethoxysilane (APTMS) reacted with 1,4-phenylenediisothiocyanate (PDC) to give -N=C=S functionalized surface, which was further reacted with zinc oxides coated with APTMS to give mica-zinc oxide nanocomposites. The composites were characterized by EA, EDS, TGA, SEM, zeta potential measurement, powder XRD, and DRS UV/Vis analyses. Finally, we measured transmittances of ultraviolet protection creams manufactured by using mica composite covered with zinc oxides in the range of 280~400 nm. The nanocomposites developed in this work might be applicable as inorganic hybrid materials for UV protecting creams.
Production of Bio-ethanol from Red Algae by Acid Hydrolysis and Enzyme Treatment
Choi, Soo-Jeong ; Lee, Sung-Mok ; Lee, Jae-Hwa ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 279~283
Bio-ethanol production research using various material has been problemed for solving problems of environment pollution caused by fossil fuels. Red-algae consists of agar, carrageenan, and porphyran. If it is treated by acid, it is able to change useful bio-mass for bio-ethanol. In this study, we found an optimal condition for bio-ethanol production from acid hydrolysate in red-algae. To produce bio-ethanol, Saccharomyces cerevisiae KCCM1129 inoculated to acid hydrolysate of Gelidium amansii. The optimal condition for Gelidium amansii hydrolysis was found to be 30 min reaction at
concentration of 1.5% and
. At this condition, its produced to 7.04 g/L galactose and 1.94 g/L glucose. And acetic acid concentration of 2.0% in agar produced 0.75 g/L galactose. In contrast, Pachymeniopis elliptica was treated with
concentration of 1.5%, it produced 6.38 g/L galactose. And Pachymeniopis elliptica treated with acetic acid concentration of 2% produced 0.368 g/L galactose. The optimal condition of ethanol production was found to be 96 h reaction at
concentration of 1.0% and
, which produced 3.77 g/L ethanol.
Characterization of Glycine Metal Salts for
Lim, Yun-Hui ; Park, Young Koo ; Jo, Young-Min ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 284~288
This work deals with the chemical characterization of glycine aqueous solution in
absorption. Three alkali elements were impregnated into the glycine in order to facilitate the formation of amino functionalities. The analysis by IR revealed the transformation of ammonium ions to the amino group. In addition, the NMR analysis showed that the substitution of metal cations to the chemical shift of hydrogen and carbon atoms in glycine; in order of lithium glycinate, sodium glycinate and potassium glycinate depending on the electro negativity. Meanwhile, the
absorption at room temperature was the highest in primary amine solution, but at the increasing temperature sodium glycinate could capture more
than that of the pure amine solution.
Control of the Gold Electrode Work Function for High Performance Organic Thin Film Transistors
Park, Yeong Don ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 289~292
Au electrodes modified with self-assembled monolayers (SAMs) were used to control the work function of source/drain electrodes in triethylsilylethynyl anthradithiophene (TES ADT)-based organic thin film transistors (OTFTs). By using benzothiol (BT) and pentafluorobenzothiol (PFBT) SAMs, the hole injection barrier between Au and the highest occupied molecular orbital (HOMO) of TES ADT was controlled. After a solvent annealing, TES ADT OTFTs with PFBT SAM-treated Au electrodes were found to exhibit high field-effect mobilities of
and on/off current ratios of
Aging Effect on the Antimicrobial Activity of Nanometal (Au, Ag)-Titanium Dioxide Nanocomposites
Park, Hye-Rim ; Lee, Sang-Wha ; Yoo, In-Sang ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 293~296
Nanocomposites were fabricated as titanium dioxide (
) doped with nanometals (Au, Ag) by sonochemical reduction method and sol-gel method in order to investigate their antimicrobial activities. Then, the antimicrobial activity of the resulting samples was compared by the measurement of colony numbers survived on the agar plate incubated for 24 h after the loading E. coli on the solid-state media with the nanocomposites. The initial antimicrobial activity of the metal (Au, Ag)-doped
was higher than that of the pristine
. Afterwards the nanocomposite samples were kept at
for a long time and the aged samples exhibited the different antimicrobial activity. With the elapse of aging times, Ag-doped
) exhibited the higher antimicrobial activity than those of
coating on the
may prevent the oxidation of Ag nanometals and stabilize colloidal nanocomposites.
Electricity Generation from Dairy Wastewater Using Microbial Fuel Cell
Roh, Sung-Hee ; Lee, Sung-Wook ; Kim, Kyung-Ryang ; Kim, Sun-Il ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 297~301
Microbial fuel cell (MFC) is the major of bio-electrochemical system which can convert biomass spontaneously into electricity through the metabolic activity of the microorganisms. In this study, we used an activated sludge as a microbial inoculum and then investigated the feasibility of using dairy wastewater as a possible substrate for generating electricity in MFC. To examine the performance of MFC as power generator, the characteristics on cell potentials, power density, cyclic voltammetric analysis and sustainable power estimation were evaluated for dairy wastewater. The maximum power density of
was achieved when the dairy wastewater containing 2650 mg/L COD was used, leading to the removal of 88% of the COD. The results from this study demonstrate the feasibility of using MFC technology to generate electricity while simultaneously treating dairy wastewater effectively.
Removal Characteristics of Phenol at Advanced Oxidation Process with Ozone/Activated Carbon Impregnated Metals
Choi, Jae Won ; Yoon, Ji Young ; Park, Jin Do ; Lee, Hak Sung ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 302~307
Advanced oxidation processes (AOP) such as O3/activated carbon process and O3/catalysts process were used to compare the decomposition of phenol. Catalysts such as Pd/activated carbon (Pd/AC), Mn/activated carbon (Mn/AC), Co/activated carbon (Co/AC) and Fe/activated carbon (Fe/AC) were prepared by impregnation of Pd, Mn, Co and Fe into the activated carbon of pellet form, respectively. Based on an hour of reactions, the following descending order for the decomposition ratios of dissolved O3 to the 1.48 mg/L of saturated dissolved O3 was observed: Mn/AC (45%) > Pd/AC (42%) > Co/AC (33%) > AC (31%) > Fe/AC (27%). The removal efficiencies of phenol were also arranged in the descending order of AOP as follows: Mn/AC (89%) > Pd/AC (85%) > Co/AC (77%) > AC (76%) > Fe/AC (71%). The remaining ratios (C/Co) of TOC (total organic carbon) after an hour of experiments were arranged in the ascending order of AOP as follows : Pd/AC (0.29) < Mn/AC (0.36) < AC (0.40) < Co/AC (0.49) < Fe/AC (0.51). However, the catalytic effects in the Co/AC and the Fe/AC processes were little in comparison with O3/AC process. The maximum concentrations of intermediates such as hydroquinone and catechol formed from the decomposition of phenol were arranged in the ascending order of AOP as follows: Pd/AC < Fe/AC < Co/AC < AC < Mn/AC. In the case of Pd/AC process, these intermediates were almost disappeared after an one hour of reaction.
Synthesis and Photodecomposition of N-Doped
Surface Treated by Ammonia
Kim, Yesol ; Bai, Byong Chol ; Lee, Young-Seak ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 308~312
photocatalysts were prepared by ammonia for exploring the visible light photocatalytic activity. To explore the visible light photocatalytic activity of the nitrogen doped
photocatalyst, the removal of methylene blue dye was investigated under the sunlight. SEM images showed that the flocculated particle sizes of N-doped
decreased due to the reaction with ammonia. XRD patterns demonstrated that the samples calcined at temperatures up to
and doped with nitrogen using ammonia clearly showed rutile as well as anatase peaks. The XPS results showed that the nitrogen composition onto
increased according to the reaction time with ammonia. Photocatalytic activity of the nitrogen doped
was better than that of undoped
. Nitrogen doping onto the
also affected the crystal type of
A Study on Mechanical Interfacial Properties of Copper-plated Carbon Fibers/Epoxy Resin Composites
Hong, Myung-Sun ; Bae, Kyong-Min ; Choi, Woong-Ki ; Lee, Hae-Seong ; Park, Soo-Jin ; An, Kay-Hyeok ; Kim, Byung-Joo ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 313~319
In this work, the electroplating of copper was introduced on PAN-based carbon fibers for the enhancement of mechanical interfacial strength of carbon fibers-reinforced composites. The surface properties of carbon fibers were determined by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and contact angle measurements. Its mechanical interfacial properties of the composites were studied by interlaminar shear strength (ILSS) and critical stress intensity factor (
). From the results, it was found that the mechanical interfacial properties of Cu-plated carbon fibers-reinforced composites (Cu-CFRPs) enhanced with increasing the Cu plating time, Cu content and COOH group up to Cu-CFRP-30. However, the mechanical interfacial properties of the Cu-CFRPs decreased dramatically in the excessively Cu-plated CFRPs sample. In conclusion, the presence of Cu particles on carbon fiber surfaces can be a key factor to determine the mechanical interfacial properties of the Cu-CFRPs, but the excessive Cu content can lead the failure due to the interfacial separation between fibers and matrices in this system.
Catalytic Cracking of Waste Lubricant Oil over Solid Acid Catalysts
Hwang, In Hye ; Yang, Hyeon Sun ; Lee, Jong-Jib ; Choi, Ko-Yeol ; Lee, Chang-Yong ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 320~325
The catalytic cracking of waste lubricant oil was carried out on silica-alumina (SA), hydrogen-type mordenite (HM), and dealuminated mordenite (DM) with the silica/alumina ratio of 10.5, 10, and 12.5, respectively. Activity in the catalytic cracking was found to be in the order of SA > DM > HM. Carbon number distribution of the oil obtained over SA was similar to that of gasoline while that of the oil obtained over DM was similar to that of diesel. Carbon number distribution of the oil obtained over HM was similar to that between gasoline and diesel. Acid amounts of three kinds of catalysts were found to be in the order of
> DM. Unlike HM and DM with pores of an uniform diameter below 10 A, SA had a pore size distribution within the range of 10 to 50 A. These results indicate that the acid amount and pore size of the catalysts may be related to the carbon number distribution of the cracked oil. The decrement of surface area by the accumulation of carbon and impurities on the surface of the catalyst was found to be in the order of SA > DM > HM.
Bioethanol Production from Wasted Corn Stalk from Gangwon Province : from Enzymatic Hydrolysis to Fermentation
Choi, Jae Min ; Choi, Suk Soon ; Yeom, Sung Ho ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 326~332
Among the samples prepared by various pre-treatment methods, the one pretreated by dilute sulfuric acid showed the highest glucose yield in the enzymatic hydrolysis. Statistical analysis of enzymatic hydrolysis revealed that the glucose yield was in proportion to the enzyme dosage, the ratio of the pre-treated sample to the buffer solution, and the reaction time and that the effect of enzyme dosage was predominant in the experiment range. In addition, the glucose yield was estimated to be 76.1% at an optimal enzymatic hydrolysis condition. In a separate hydrolysis and fermentation (SHF), Saccharomyces cerevisiae converted over 80% of glucose from the enzymatic hydrolysis of pre-treated wasted corn stalk by dilute sulfuric acid to bioethanol with 37% of ethanol yield and 0.42
of productivity. In the simultaneous saccharification and fermentation (SSF), 59.5% of conversion from glucan to ethanol and 0.20
of productivity were achieved. In both SHF and SSF, approximately 88 g of bioethanol could be obtained from 1 kg of wasted corn stalk. The possible amount of bioethanol in Gangwon province were estimated to be 1.9 kiloton with the assumption of the 50% of collection ratio.
A Study on the Combustion Characteristics of Pelletized and Fluff RDF (Refuse Derived Fuel)
Sanjel, Nawaraj ; Gu, Jae-Hoi ; Kwon, Woo-Teck ; Oh, Sea Cheon ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 333~338
To verify the utilization of fluff refuse derived fuel (RDF) as energy source, the combustion charateristic has been studied by an experimental combustion furnace under various temperatures. The characteristics of flue gas, dust and residue from fluff RDF combustion has been analyzed and compared with those of pelletized RDF. From this work, it was found that the incomplete combustion of fluff RDF was greater than that of pelletized RDF because the combustion reaction rate of fluff RDF was faster than that of pelletized RDF, and oxgen concentration in fluff RDF combustion decreased rapidly. It was also found that carbon monoxide concentration of flue gas from fluff RDF combustion increased with combustion temperature because the oxygen consumption and the incomplete combustion increased. Therefore, it is felt that the combustion operation conditions of fluff RDF should be carefully determined.
Preparation and Properties of Glass Fiber-Reinforced Poly(olefin ketone) Composites
Cho, Hae-Souk ; Chung, Jae-Seung ; Baek, Seung-Jo ; Choi, Won Jae ; Kim, Jin-joo ; Yoon, Sung Kyun ; Lee, Jong-Chan ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 339~343
Poly(olefin ketone) terpolymer having excellent mechanical properties was synthesized and composite materials of poly(olefin ketone) containing polyurethane/amino silane functionalized glass fibers were prepared. The compatibilities between the functionalized glass fiber and the polymer were characterized by observing the fracture surfaces of the composites using scanning electron microscopy (SEM). Mechanical properties of composites with different contents, diameters, lengths, and binders of glass fibers were also studied using universal testing machine (UTM). The introduction of suitably functionalized glass fiber into the poly(olefin ketone) produces composite materials having excellent mechanical properties and they are very promising alternative materials for the engineering plastic applications.
Transesterification Reaction of Soybean Oil over KF/MgO Catalyst
Jo, Yongbeom ; Jeon, Jong-Ki ; Park, Sung Hoon ; Park, Young-Kwon ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 344~347
The basic strength of the MgO catalyst was enhanced by impregnating it with KF to synthesize a highly active catalyst for the bio-diesel production. To increase basicity, KF impregnated on synthesized MgO in laboratory. The synthesized catalyst was characterized using
adsorption-desorption, X-Ray diffraction, X-Ray fluorescence, and
temperature programmed desorption analyses. Bio-diesel was produced from soybean and methanol and its fatty acid methyl ester content was measured to evaluate the activity of the catalyst. The catalyst impregnated with 30 wt% KF exhibited the highest activity, which was attributed to its abundant intermediate base site.
Removal of Nitrogen Oxides Using
Jeon, Mi-Jin ; Jeon, Jong-Ki ; Park, Sung Hoon ; Park, Young-Kwon ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 348~351
The effect of the addition of Cu on the catalytic activity of the
catalyst for the low-temperature SCR reaction of NO was investigated. Three different amounts of Cu, 5, 10, and 15 wt%, were impregnated on the
catalyst. The characteristics of the synthesized catalysts were examined by BET, XRD, XPS, and
analyses. The de-NOx efficiency of the Cu-added catalysts increased with the amount of Cu. When 15 wt% Cu was impregnated, the deNOx efficiency was the highest, reaching as high as 99%. The increased deNOx efficiency is attributed to the enhanced reducing power stemming from the interaction between Mn and Cu on the catalyst surface.
Effect of Particle Size on Thermal Property of RDX and HMX
Kim, Seung Hee ;
Applied Chemistry for Engineering, volume 23, issue 3, 2012, Pages 352~357
Techniques of thermal analyses such as DSC and TGA have been used in the study of activation energy (Ea) and frequency factor (A) depending on the particle size of RDX and HMX. Activation energy and frequency factor were calculated by Kissinger's method and Vyazovkin's method. As the particle size of RDX increased, TGA showed activation energy increased, but DSC didn't show. However, In case of HMX, as the particle size increased, both of DSC and TGA showed increase in activation energy. Moreover, Vyazovkin's method can obtain activation energy and mechanism according to decomposition of RDX and HMX.