Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal Basic Information
Journal DOI :
The Korean Society of Clean Technology
Editor in Chief :
Volume & Issues
Volume 15, Issue 4 - Dec 2009
Volume 15, Issue 3 - Sep 2009
Volume 15, Issue 2 - Jun 2009
Volume 15, Issue 1 - Mar 2009
Selecting the target year
A Study on the Remanufacturing of the Waste Three-way Catalysts
Huh, Been ; Park, Hea-Kyung ; Lee, Choul-Ho ;
Clean Technology, volume 15, issue 3, 2009, Pages 147~153
Waste three-way catalysts were remanufactured by ultrasonic wave treatment followed by active component re-impregnation and the catalytic activities and surface properties of remanufactured catalysts were measured at various remanufacturing conditions. In case of the catalyst prepared by ultrasonic wave cleaning, the optimal period for elimination of surface contaminants from the waste catalyst was found to be about 5 minutes. The proper re-impregnation amounts of the active components for the best catalytic performance were investigated and the catalytic performance tests were also carried out with various temperature for the total hydrocarbon (THC), carbon monoxide (CO) and nitrogen oxides (NOx) conversions. The experimental results showed that the catalytic performances of the remanufactured catalysts were recovered almost the same level as those of the fresh catalyst except those of the NOx conversion.
A Study on Drying and Carbonization of Organic Sludge from Sewage Plant and Petrochemical Industries for Energy and Resources Recovery
Jun, Kwan-Soo ; Hwang, Eung-Ju ; Kim, Hyung-Jin ;
Clean Technology, volume 15, issue 3, 2009, Pages 154~164
In 2007, 94% of organic wastewater sludge from industries located in Ulsan was disposed of by ocean dump. The ocean dump of organic sludge would be totally prohibited by the year of 2012. However, there is no alternative but incinerating the sludge from the industries located in Ulsan. Securing the technology for sludge treatment and on-land disposal is very important issue among the industries in the Ulsan Petrochemical Industry Complex. In this study, the material aspects of dried and carbonized sludge as a fuel were evaluated for petrochemical and sewage sludge from Ulsan. The dried and carbonized sludges from the factories producing terephthalic acid, BTX, propylene, chemical textile, etc. of which the low heat value exceeded 3,000 kcal/kg had high potential as a fuel according to the results of thermal characteristic analysis. However, the dried sludges with heat values lower than 2,100 kcal/kg and carbonized sludges, lower than 1,100 kcal/kg containing more Inorganic material from the industries producing pulp, paper, methylamine, amide, etc. had a little potential to be used as a fuel. In most cases, drying the sludge showed better results than carbonization in the aspect of thermal characteristics of sludge.
Development of Optimal Stage Calculation Program for the Design of Waste Etchant Recovering Process
So, Won-Shoup ; Park, Jin-Soo ; Jung, Jae-Hak ; Sur, Gil-Soo ;
Clean Technology, volume 15, issue 3, 2009, Pages 165~171
In this study, we found out the relation between
recovering-concentration and stage number of extraction process for invar (Fe+Ni) etching process. In order to get the desired
recovering-concentration economically, we developed the simulation program for designing the optimal
extraction process. We got the key parameter for this simulation program through pilot scale experiments. The process simulation by the developed program could reduce the emission of waste etching solution as well as the treatment costs. In addition, the developed program could calculate the number of stage of the etchant recovering system and the process time to get the desired concentration of
. This program was used to compute the optimal capacity of the etchant recovering system and applied to the optimization of the stage of the etchant recovering system in real IT industry.
Preparation and Properties of EPDM/Thermoplastic Polyurethane Scrap Blends
Lee, Young-Hee ; Kang, Bo-Kyung ; Yoo, Hye-Jin ; Kim, Jung-Soo ; Jung, Young-Jin ; Lee, Dong-Jin ; Kim, Han-Do ;
Clean Technology, volume 15, issue 3, 2009, Pages 172~179
The thermoplastic polyurethane waste (TPU-S) with good tensile properties, hardness, NBS abrasion resistance, specific gravity and low wet coefficient of kinetic friction was melt-blended with ethylene propylene diene monomer rubber (EPDM) with high wet slip resistance and low mechanical properties to form EPDM/TPU-S blend films, and their composition-property relationship was investigated to find the optimum composition for shoe outsole material. The properties except the wet slip resistance increased with increasing TPU-S contents in the blend. All the properties except elongation at break, specific gravity and the wet coefficient of kinetic friction in the range of
of TPU-S did not attain the values predicted by the simple additive rule. The optimum weight ratio of EPDM/TPU-S for the application to the typical shoe outsole material was found to be 30/70.
A Study on the Development of Eco-friendly Materials Using EPDM Scrap : Functionalization of EPDM and PP
Kim, Sub ; Chung, Kyung-Ho ;
Clean Technology, volume 15, issue 3, 2009, Pages 180~185
The ethylene-propylene rubber (EPDM) scrap generated from automobile weatherstrip manufacturing process was used to make a thermoplastic elastomer through blending with polypropylene. The surface activated EPDM powder was obtained by the high temperature and shear pulverizer. The addition of surfactant resulted in more surface activated EPDM powder and the optimum loading amounts of surfactant was 1.5 phr. Maleic anhydride was grafted onto polypropylene by reactive blending to give functionalized polypropylene. The wetting property between EPDM scrap and polypropylene was improved by the addition of poly (ethylene-co-acrylic acid) as a compatibilizing agent. Poly(ethylene-co-acrylic acid) decreased the surface tension of polypropylene and thus would contribute to the wettability with EPDM powder.
Effect of Reaction Temperature Program on Thermal Degradation of Low-quality Pyrolytic Oil for Bench-scale Continuous Reaction System
Lee, Kyong-Hwan ; Nam, Ki-Yun ;
Clean Technology, volume 15, issue 3, 2009, Pages 186~193
The characteristics of product materials obtained from thermal degradation of low-qualify pyrolytic oil were investigated in this study. The reactants were produced by pyrolysis of mixed plastic waste with film type in a commercial rotary kiln reaction system. The properties of reactants were measured by elemental analysis, calorimetry analysis and SIMDIST analyst. The result of degradation experiments with different reaction temperature programs was discussed through product yields, cumulative yields and production rates of oil products. The multi-step reaction temperature program resulted in higher yields of product oils and lower yields of residues than one-step reaction temperature program. The product characteristics such as production yield and the rate of oil products etc. were influenced by reaction temperature program in the continuous thermal degradation.
Reduction of Nitrate-Nitrogen by Zero-valent Iron Nanoparticles Deposited on Aluminum yin Electrophoretic Method
Ryoo, Won ;
Clean Technology, volume 15, issue 3, 2009, Pages 194~201
Reductive reactivity of zero-valent iron nanoparticles was investigated for removal of nitrate-nitrogen which is considered one of the major water pollutants. To elucidate the difference in reactivity between preparation methods, iron nanoparticles were synthesized respectively from microemulsion and aqueous solution of ferric ions. Iron nanoparticles prepared from microemulsion were deposited on aluminum by electrophoretic method, and their reaction kinetics was compared to that of the same nanoparticles suspended in aqueous batch reaction. With an approximation of pseudo-first-order reaction, rate constants for suspended nanoparticles prepared from microemulsion and dilute aqueous solution were
, respectively. Iron nanoparticles supported on aluminum showed ca. 30% less reaction rate in comparison with the identical nanoparticles in suspended state. However, supported nanoparticles showed the superior effectiveness in terms of nitrate-nitrogen removal per zero-valent iron input especially when excess amounts of nitrates were present. Iron nanoparticles deposited on aluminum maintained reductive reactivity for more than 3 hours, and produced nitrogen gas as a final reduction product of nitrate-nitrogen.
Post-annealing Effect of N-incorporated
Films for Photoelectrochemical Cells
Ahn, Kwang-Soon ;
Clean Technology, volume 15, issue 3, 2009, Pages 202~209
:N) films were synthesized using a reactive RF magnetron sputtering on unheated substrate and then post-annealed at different temperatures from 300 to
in air. The N anion narrowed optical band gap, due to its mixing effect with the O 2p valence states. Furthermore, it was found that the crystallinity of the
:N films was significantly improved by the post-annealing at
and higher. As a result, the
:N films exhibited much better photoelectrochemical performance, compared with pure
films post-annealed at the same temperature.
A Study on the Trend of Technology for the Treatment of Oil from Oilsands by Patent Analysis
Park, Kun-Yik ; Han, Sam-Duck ; Han, Hye-Jung ; Kang, Kyung-Seok ; Bae, Wi-Sup ; Rhee, Young-Woo ;
Clean Technology, volume 15, issue 3, 2009, Pages 210~223
As a kind of an energy source to replace petroleum, the importance of oilsands is being emphasized as time goes on. In this paper, the trend of technology for the treatment of oil from oilsands was scrutinized using the patent analysis. The patents analyzed here were limited to them issued from 1973 to 2009. The technology trend of oil treatment of oilsands was analyzed by classifying each patent based on the year of publication, the country, the type of technology, and the major applicant of the patent.
Life Cycle Assessment on the Reuse of Glass Bottles
Kim, Hyung-Jin ; Kwon, Young-Shik ; Choi, Yoon-Geun ; Chung, Chan-Kyo ; Baek, Seung-Hyuk ; Kim, Young-Woo ;
Clean Technology, volume 15, issue 3, 2009, Pages 224~230
Life Cycle Assessment (LCA) has been studied on the reuse of glass bottles. The system boundary in this study encompassed from gate to gate such as production and transportation. A 360 mL volume of a glass bottle was selected as the functional unit. The environmental impact assessments was studied on 6 categories including abiotic resource depletion, acidification, eutrophication, global warming, ozone depletion, and photochemical oxidant creation. The results showed that the most significant impact categories were abiotic resource depletion (48.63%) and global warming (46.27%), and the rest categories revealed insignificant impacts. In the whole system, the chemicals used for the new bottle production revealed the major contribution to the environmental impacts (71.24%), followed by the use of electricity (16.74%) and transportation (11.8%). In addition, the environmental impact of sodium silicate to be put into the stage of the new bottle production was found to be 45.68%, causing severe influence on abiotic resource depletion and global warming.