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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
Editor in Chief :
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
Current Status and Technical Development for Di-Methyl Ether as a New and Renewable Energy
Jo, Won-Jun ; Kim, Seung-Soo ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 355~362
Fuels based on petroleum will eventually run out in the near future. DME (Di-methyl Ether) is a clean energy source that can be manufactured from various raw materials such as natural gas, coal as well as biomass. As DME has no carbon-carbon bond in its molecular structure and is an oxygenate fuel, its combustion essentially generates no soot as well as no SOx. Because the physical properties of DME are similar to those of LPG, the LPG distribution infrastructure can be converted to use with DME. DME has such high cetane number of 55∼60 that it can be used as a diesel engine fuel. Practical use of DME as a next-generation clean fuel or next-generation chemical feedstock is advancing in the fields of power generation, diesel engines, household use, and fuel cells, among others. The purpose of this paper is review the characteristics, standardization, status of research and development in domestic and foreign countries of DME.
Recent Studies on New Value-added Glycerol Derivatives
Park, Seung-Kyu ; Rang, Moon-Jeong ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 363~369
High oil price and biodiesel expansion lead the surplus of glycerol in the market. Glycerol has been used as a raw material itself at petroleum chemistry, paint, tobacco, household products and cosmetics in the conventional market. Recently, many research to find new applications of glycerol as a low-cost feedstock for functional derivatives have led to the introduction of a number of selective processes for converting glycerol into commercially value-added products. The recent studies on the development of new value-added glycerol derivatives will be reviewed.
Characterization of Double-layer Optical Sensing Membranes for Dual Sensing of Dissolved Oxygen Concentrations and pH and Their Application to the On-line Monitoring of Fermentation Processes
Kim, Chun-Kwang ; Lee, Jong-Il ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 370~374
A double-layer optical sensing membrane has been fabricated to measure the concentration of dissolved oxygen (DO) and pH value simultaneously. (tris(4,7-diphenyl-1,10-phenanthroline (Rudpp) ruthenium(II)) as a DO sensitive dye has been mixed in the methyl trimethoxy silane (MTMS) sol-gel solution and coated onto one well in a 24-well microtiter plate. On the DO-sensing layer the GA (3-glycidoxypropyl trimethoxy silane (GPTMS), 3-aminopropyl trimethoxy silane (APTMS)) sol-gel solution mixed with 8-hydroxypyrene-1,3,6-trisulfonic acid trisodium salt (HPTS) has been coated and used to measure pH values. The double-layer sensing membrane was affected by ionic strength and temperature. The double-layer sensing membrane for DO and pH has been applied to online monitor in microorganism cultivation processes and showed a good performance.
Energetic Thermoplastic Elastomers from Azidated Polyepichlorohydrin Rubber (Az-PECH)/ Styrene Acrylonitrile Copolymer (SAN) Blends
Choi, Myung-Chan ; Chang, Young-Wook ; Noh, Si-Tae ; Kwon, Jung-Ok ; Kim, Dong-Kook ; Kwon, Soon-Kil ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 375~380
Polyepichlorohydrin rubber was treated with sodium azide (Na
) to replace its chlorine by azide (
). Then, the azidated polyepichlorohydrin rubber (Az-PECH) was blended with thermoplastic styrene-acrylonitrile copolymer with the rubber/plastic ratio of 80/20, 70/30 and 60/40 (wt/wt). The miscibility, mechanical and dynamic mechanical properties as well as elastic recovery properties of the blends were evaluated by DMA (Dynamic Mechanical Analyzer) and tensile tests. When azidation level in azidated PECH was upto 50%, the blends exhibited excellent miscibility, manifested by a single
, and fairly good elastic recovery. When azidation level was 75%, the blends showed phase separation. The miscible Az-PECH/SAN blends exhibited typical thermoplastic elastomer like properties, ie. melt processibility and high extensibility as well as good elastic recovery rate. It was also observed from combustion test that higher energy is released with the increase in the azidation level of the Az-PECH in the blends.
Surface Study on the Supported Molten Salt Catalyst
Kim, Jong-Pal ; Lee, Kwang-Hyun ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 381~385
A basic objective is the preparation and surface studies of supported molten salt catalysts because molten salts can stay as the liquid phase in the range of the ordinary reaction temperature. Many kinds of metal salt mixtures for the formation of molten salt phase are appliable but CuCl and KCl were selected in this study because Cu is considered catalytically reactive in many reactons. The loading of the molten salt was selected as 25 vol% of the total pore volume of
-alumina to provide reasonable exposed surface area. The surface structure of catalysts containing molten salts in the
-alumina was studied using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). CuCl and KCl were added into the
-alumina using concentrated hydrochloric acid solution by the impregnation technique. The surfaces of the prepared catalysts before and after heat treatments were compared and they suggested that the heat treatment of catalysts helped the formation of molten-salt although the surface compositions of CuCl and KCl were not uniform.
Construction of Antibacterial Electrospun Nanofiber from Poly(styrene-co-sulfadiazine) via Electrospinning
Hwang, Seok-Ho ; Ahn, Kyung-Hwan ; Cha, Hee-Chul ; Kim, Jeong-Yeol ; Hwang, Hong-Gu ; Huh, Wan-Soo ; Lee, Sang-Won ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 386~390
In this study, sulfadiazine acrylamide monomer was synthesized by the reaction of sulfadiazine, known as an antibiotic substance, with acryloyl chloride. The monomer was characterized by
. Using the synthesized sulfadiazine acrylamide monomer and styrene monomer, a copolymer, poly(styrene-co-sulfadiazine), was obtained by the free radical copolymerization and characterized by
, GPC, DSC and TGA. The copolymer nanofibers web has been successfully prepared by electrospinning technique under DMF solution. The diameter of the nanofibers was in the range between 500 and 800 nm. Antibacterial activity of the nanofiber web was evaluated utilizing the colony counting method against Staphylococcus aureus and Escherichia coli.
The Study of Energy Conversion in a 2 Ton/day Waste-wood Fixed Bed Gasifier
Lee, See-Hoon ; Son, Young-Il ; Ko, Chang-Bok ; Choi, Kyung-Bin ; Kim, Jae-Ho ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 391~395
For the conversion of domestic waste-wood into energy, a fixed bed gasifier (0.9 m
2.4 m) having the capacity of 2 ton/day was designed and constructed. The dual knife valve was used to feed waste-wood of which size was 3∼5 cm and a rotary stoker system was installed in the bottom of gasifier. The pilot gasification system consisted of feeding system, fixed bed gasifier, gravity fine particle collector, heat exchanger for syngas cooling, ID fan, and cooling tower. The operation temperatures of gasifier were 700∼1000
and the concentrations of syngas were CO: 25∼40 vol%,
: 7∼12 vol%,
: 2∼4 vol%,
: 12∼24 vol%. The calorific value of syngas was 1100∼1500
and was enough to be applied in the industrial combustor. Also the gas engine was operated by using syngas from biomass gasifier and produced 1∼4 kW of power.
Preparation of Micro-spherical Activated Carbon with Meso-porous Structure for the Electrode Materials of Electric Double Layer Capacitor
Um, Eui-Heum ; Lee, Chul-Tae ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 396~401
A micro-spherical activated carbon with meso-pore structure of 52∼64% and particle diameter of 2∼10
m was prepared for the improvement electrochemical performance of activated carbon as electrode material for electric double layer capacitor. Resorcinol-formaldehyde resin was used as a carbon source in this preparation. According to electrochemical analysis of EDLC using this activated a carbon with showing effects to reduce charge transfer resistance and to increase rate capability, it was found out that micro-spherical activated carbon could be a good method as well as a material for enhancing the performance of electric double layer capacitor.
Surface Modification of
Thin Films by
Atmospheric Plasma and Evaluation of Photocatalytic Activity
Lim, Gyeong-Taek ; Kim, Kyung-Hwan ; Park, Jun ; Kim, Kyoung-Seok ; Park, Yu-Jeoung ; Song, Sun-Jung ; Kim, Jong-Ho ; Cho, Dong-Lyun ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 402~406
thin films were surface-modified with atmospheric plasma and their photocatalytic activities were evaluated. The films were deposited on glass plates by dip-coating in a
sol-gel solution and sintered at various temperatures for various times. Nitrogen plasma was used for the modification and the experiments were carried out varying operational parameters such as discharge power and treatment time. Photocatalytic activity was evaluated based on the degradation efficiency of methylene blue (MB) under irradiation of UV-A and fluorescent light. According to XPS analysis, a little amount of nitrogen was found to be doped in the film surface after the modification. As a result, photocatalytic activity increased under irradiation of UV-A and fluorescent light, especially fluorescent light.
Removal of Ethylene Over
/Silica-alumina: Effect of Synthesis Methods and Reaction Temperatures
Cho, Min-Whee ; Yoon, Song-Hun ; Park, Yong-Ki ; Choi, Won-Choon ; Kim, Hee-Young ; Park, Seung-Kyu ; Lee, Chul-Wee ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 407~410
with Si/Al = 1/5 and 1/10, and 20 wt%
were prepared by solvent evaporation method. Catalytic activity of ethylene abatement over those samples were evaluated and compared under the conditions of GHSV 1125
, ethylene gas (ethylene 0.2%, air 99.8%, relative humidity 50%) at 30, 40, 60 and 120
using a fixed-bed reactor.
was showed better performance than
by 170∼210% at 30, 40
, and by 60% at 60, 150
Preparation of Heating Fuel by the Recycling of High Viscosity Waste Oil
Jin, Eui ; Chung, Yeong-Jin ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 411~415
To replace waste oil with the lowest grade which has high viscosity into heating fuel, light oil and buncker C oil in waste oil was used and the fuel characteristic was analyzed by its concentration after mixing oil. The mixture conditions were controlled by the reaction time (30s∼30 min) and kept by the reaction temperature (75
) when mixing speed was stirred at 3400∼3600 rpm. We used the buncker C oil and light oil to decrease viscosity of waste oil and the dynamic viscosity was decreased by 81∼96%. Optimum mixing ratio (waste oil : buncker C oil : light oil) as heating fuel was 1 : 1 : 1. Flash point, dynamic viscosity and heating value of this case were identified 78
, $20.02 mm^2/_s$, 9158 kcal/L respectively.
Properties of Intumescence Alkali Silicates for Building Fire-Resistant
Kang, Hyun-Ju ; Kang, Seung-Min ; Song, Myong-Shin ; Kim, Young-Sik ; Park, Jong-Hun ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 416~422
The buildings constructed with steel structure are coated with certified fire resistive material to resist from fire. All the building materials lose their initial performances as time passes by, so they need some maintenance. The Sprayed Fire Resistive Material (SFRM) also loses its performance and this performance loss of the SFRM is very important because fire resistance of buildings depends on SFRM. So this study was aimed to synthesis of alkali-silicates for SFRM and to evaluate the effect of alkali-silicates, K-silicates, Na-silicates and Li-silicates, by exchange of mole ratios as basic factors, tested solubility, intumescence ratios, thermal analysis, powder X-ray diffraction, fire-resistant and heat-resistant.
Development of a Gliding Arc Plasma Reforming System to Produce Hydrogen Form Biogas
Kim, Seong-Cheon ; Yang, Yoon-Cheol ; Chun, Young-Nam ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 423~429
The purpose of this study is to investigate the optimal condition for the hydrogen-rich gas production and the CO removal by reforming of gliding arc plasma reforming system using biogas. The parametric screening studies were carried out according to changes of steam feed amount, catalyst bed temperature in water gas reactor and catalyst bed temperature, input air flow rate in preferential oxidation reactor. The standard condition is as follows. The steam/carbon ratio, catalyst bed temperature, total gas flow rate, input electric power and biogas composition rate (
) were fixed 3, 700
, 16 L/min, 2.4 kW and 6 : 4, respectively. The results are as follow, HTS optimum operating conditions were S/C ratio of 3 and reactor temperature of 500
. LTS were S/C ratio of 2.9 and temperature of 300
. Also, PROX I optimum conditions were input air flow rate of 300 mL/min and reactor temperature of 190
. PROX II were 200 mL/min and 190
respectively. After having passed through each reactor, the results were as follows: 55% of
yield, 0% of CO selectivity, 99% of
conversion rate, 27% of
conversion rate, respectively.
A Study on the Remanufacturing Effect of Aged Three-Way Catalysts
Kwak, Seung-Min ; Lim, Jong-Sun ; Kim, Tae-Won ; Park, Hae-Kyoung ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 430~436
Deactivated three-way catalysts which had been exposed to gasoline engine exhaust for a long time were remanufactured by ultra sonic cleaning with distilled water, sulfuric acid solution and impregnation with precious metals (Pt, Pd, Rh). The catalytic properties as well as conversion reactivity of CO, THC and NOx about fresh, aged and remanufactured catalysts were examined. Most of the pollutants deposited on the aged three-way catalysts were removed in the remanufacturing process of those catalysts. At the same time a little amount of precious metals like Pt and Pd were removed in the remanufacturing process. Under the experimental condition used in this study, in the case of the remanufactured catalysts with impregnation of precious metals, the catalytic activities were recovered to almost the same level, or higher level of that of the fresh catalyst.
A Study of Simultaneous Reaction for NOx, Soot and Thermal Shock according to Pt Catalyst's Supports
Kim, Sung-Su ; Park, Kwang-Hee ; Bae, Se-Hyun ; Hong, Sung-Chang ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 437~442
In this work, thermal shock and simultaneous removal reaction for NOx, soot over Pt catalysts using
as support were studied. The catalytic reaction test for NOx and soot were also performed independently and simultaneously, as a result, it showed different NOx removal efficiency and soot oxidation rate according to support and phase, and the onset temperature of soot oxidation has correlation to NOx removal efficiency for the catalyst. The onset temperature of soot oxidation shifted to lower temperature by generated
at the simultaneous reaction for NOx and soot. Also Pt/
catalyst is more affected than Pt/
on NOx removal efficiency caused by thermal shock while Pt sintering effect induced to reduce the performance on soot oxidation rate for all catalysts.
Study on the Immobilized Lipase-Mediated Selective Synthesis of 1,3-Diglyceride
Chung, Dae-Won ; Cho, Mi-Hye ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 443~448
It is known that 1,3-diglyceride (1,3-DG) hardly accumulates inside human body because the metabolism of 1,3-DG is entirely different from that of general fats such as triglycerides (TG). This research focuses on the selective synthesis of 1,3-DG by the esterification reaction using an immobilized lipase. For a reaction between glycerin and oleic acid (OA) with a mole ratio of 1 : 2 under vacuum, changes in the compositions of monoglyceride (MG), TG and DG and the contents of 1,3-isomers in DG were investigated, as a function of reaction temperature and the amount of lipase. The reactivities determined by the rate of the consumption of OA became higher with increased in temperature and the amount of lipase. Changes in the compositions of MG, DG and TG, however, occurred after the DG content reached maximum, which were found to be dependent on various factors. TG was a main product, and significant decrease in the amount of both 1,3-DG and DG were observed, when reactions were carried out at high temperatures or when 10 wt% of lipase was used.
Formate Decarboxylation: Initial Step for Hydrogen Production by Enterobacter aerogenes
Choi, Jin-Young ; Jho, Young-Choong ; Ahn, Ik-Sung ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 449~452
The absence of Fe, Se, and Mo in a minimal medium prevented the production of hydrogen from the anaerobic culture of Escherichia coli MC4100. Fe, Se, and Mo are known to be cofactors of formate dehydrogenase (
) of both E. coli and Enterobacter aerogenes. Hence when these trace elements are absent in the minimal medium, hydrogen production through formate dehydrogenation would be inhibited not only in E. coli but also in E. aerogenes. Hydrogen production by E. aerogenes 413 was delayed when lacking these trace elements. Therefore, it is believed that hydrogen production of E. aerogenes is initiated not by the reoxidation of nicotinamide adenine dinucleotide (NADH) but by formate decarboxylation.
Decomposition over Fe-TNU-9 Zeolite
Park, Jung-Hyun ; Jeon, Seong-Hee ; Van Khoa, Nguyen ; Shin, Chae-Ho ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 453~458
Iron-containing TNU-9 zeolites were prepared by aqueous ion exchange in the range of Fe contents 0.6∼3.3 wt%. Direct decomposition of
was performed varying
concentrations and reaction temperatures. Fe-TNU-9 zeolites used were characterized using XRD,
sorption, SEM/EDX. A 2.7 wt% Fe-TNU-9 zeolite showed high activities and above this contents of Fe the effect of catalytic activity was little dominated. Fe-TNU-9 zeolites after ion exchange conserved their TNU-9 structure although the degree of crystallinity was decreased until ca. 60% in 3.1 wt% Fe-TNU-9 zeolite after ion exchange in 0.01 M Fe solution. The decrease in the degree of crystallinity could be correlated with the decrease of surface area and pore volume. The partial reaction order of
in the decomposition of
was dependent on the reaction temperature from 0.69 at 420
to 0.97 at 494
. The activation energy of
was also dependent on the
concentration and its value is ranged to 34∼43 kcal/mol.
Effect of Plasticizer on Physical Properties of Poly(vinyl acetate-co-ethylene) Emulsion
Choi, Yong-Hae ; Lee, Won-Ki ;
Applied Chemistry for Engineering, volume 20, issue 4, 2009, Pages 459~463
In this study, physical properties of poly(vinyl acetate-co-ethylene) (VAE) emulsion were investigated by adding different amounts of di-butyl phthalate (DBP) which is a common plasticizer of VAE. The glass transition temperature
of the dried plasticized VAE emulsion film, which measured by Differential Scanning Calorimeter, was decreased with increasing the DBP contents while the viscosity of the plasticized VAE emulsion was increased with the DBP contents. These results suggest that the plasticizer in the dried VAE film can prevent the strong interaction between chains, resulted by the decrease of
. In the emulsion, however, the particle sizes were swelled by the penetration of plasticizers and then its viscosity increased with the DBP content. When the DBP was added, the mechanical properties of the plasticized VAE films, such as tensile strength, elongation and creep resistance, were decreased while the water resistance was increased.