EB Technology Co.

Yuseong gu, South Korea

EB Technology Co.

Yuseong gu, South Korea

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Kim J.,EB Technology Co. | Kim Y.,EB Technology Co. | Han B.,EB Technology Co. | Doutzkinov N.,Veslets Street | Jeong K.-Y.,Kongju National University
Journal of the Korean Physical Society | Year: 2011

Increasing urbanization has been accompanied by significant air pollution, and the activities to produce heat and electrical energy are responsible for emitting a large number and amount of pollutants. Electrons interact with such pollutants in stack gases containing sulfur oxides (SO2 and SO3), nitrogen oxides (NOX = NO2 + NO) and volatile organic compounds to create divergent ions and radicals, including oxidizing radicals and excited species. These excited species react in various kinds of neutralization reactions to convert SO2 and NOX into a dry product containing ammonium sulphate (NH4)2SO4 and ammonium nitrate NH4NO3, the latter being usable as a fertilizer. After the successful operation of pilot plant, a feasibility study for an industrial scale electron-beam flue-gas treatment (EBFGT) facility for the 120-MW power plant in thermal power station "Sviloza" AD in Svishtov, Bulgaria, treating a flue gas flow of 6.0 × 105 m3/h (NTP) was carried out with a comprehensive engineering and cost study. The required electron beam power of the accelerators is 4 × 350 kW, and the expected efficiencies of removal for SOX and NOX are 85% and 40%, respectively.


Kim J.H.,Chungnam National University | Sohn Y.,Yeungnam University | Kim I.,EB Technology Co. | Han B.,EB Technology Co. | Shin W.G.,Chungnam National University
Aerosol and Air Quality Research | Year: 2012

This study presents a novel use of an electron beam irradiation system for the gas phase synthesis of nanoparticles, and demonstrates that SiO2 nanoparticles can be synthesized in ambient conditions. The formation of SiO2 nanoparticles is confirmed by the vibrational modes shown in FT-IR spectra, and the binding energy of Si 2p in the X-ray photoelectron spectrum. In this work, nanoparticles with average diameters of 210 nm and 73 nm were produced. The average particle size was controlled by adjusting the residence time of the precursor vapor. © Taiwan Association for Aerosol Research.


Han B.,EB Technology Co. | Kyu Kim J.,EB Technology Co. | Kim Y.,EB Technology Co. | Seung Choi J.,Korea Dyeing Technology Center | Young Jeong K.,Kongju National University
Radiation Physics and Chemistry | Year: 2012

Textile dyeing processes consume large amount of water, steam and discharge filthy and colored wastewater. A pilot scale e-beam plant with an electron accelerator of 1MeV, 40kW had constructed at Daegu Dyeing Industrial Complex (DDIC) in 1997 for treating 1,000m3 per day. Continuous operation of this plant showed the preliminary e-beam treatment reduced bio-treatment time and resulted in more significant decreasing TOC, CODCr, and BOD5. Convinced of the economics and efficiency of the process, a commercial plant with 1MeV, 400kW electron accelerator has constructed in 2005. This plant improves the removal efficiency of wastewater with decreasing the retention time in bio-treatment at around 1kGy. This plant is located on the area of existing wastewater treatment facility in DDIC and the treatment capacity is 10,000m3 of wastewater per day. The total construction cost for this plant was USD 4M and the operation cost has been obtained was not more than USD 1M per year and about USD 0.3 per each m3 of wastewater. © 2012 Elsevier Ltd.


Chmielewski A.G.,Institute of Nuclear Chemistry and Technology of Poland | Han B.,EB Technology Co.
Topics in Current Chemistry | Year: 2016

Worldwide, there are over 1700 electron beam (EB) units in commercial use, providing an estimated added value to numerous products, amounting to 100 billion USD or more. High-current electron accelerators are used in diverse industries to enhance the physical and chemical properties of materials and to reduce undesirable contaminants such as pathogens, toxic byproducts, or emissions. Over the past few decades, EB technologies have been developed aimed at ensuring the safety of gaseous and liquid effluents discharged to the environment. It has been demonstrated that EB technologies for flue gas treatment (SOx and NOx removal), wastewater purification, and sludge hygienization can be effectively deployed to mitigate environmental degradation. Recently, extensive work has been carried out on the use of EB for environmental remediation, which also includes the removal of emerging contaminants such as VOCs, endocrine disrupting chemicals (EDCs), and potential EDCs. © 2016, Springer International Publishing Switzerland.


Han B.,EB Technology Co. | Kim S.,EB Technology Co. | Kim J.,EB Technology Co.
Journal of the Korean Physical Society | Year: 2011

The discovery of ionizing radiation has led to dramatic advances in material processing, and these advances are being used for a wide range of procedures in industry, agriculture, and research. Electron accelerators were introduced in Korea during 1970s, firstly for research and later for insulated wire and cable production, and now, over 50 accelerators are being used in industries, mainly for cable productions, thermo-shrinkable materials, foam sheets, coating and curing, sterilization of medical products, food preservation, environmental protections and others. The benefits and the risks involving radiation need to be established so that an informed judgment can be made on their use, and any risks minimized. Nevertheless, ionizing radiation can be harmful to human beings, and people must be protected from unnecessary or excessive exposures. Thus in circumstances that we can control, we need to make a careful balance between the benefits and the risks of the procedures that expose people to radiation.


Huang C.-N.,National Sun Yat - sen University | Bow J.-S.,E. B. Technology Co. | Zheng Y.,National Sun Yat - sen University | Chen S.-Y.,I - Shou University | And 2 more authors.
Nanoscale Research Letters | Year: 2010

Titanium oxide compounds TiO, Ti 2O 3, and TiO 2 with a considerable extent of nonstoichiometry were fabricated by pulsed laser ablation in water and characterized by X-ray/electron diffraction, X-ray photoelectron spectroscopy and electron energy loss spectroscopy. The titanium oxides were found to occur as nanoparticle aggregates with a predominant 3+ charge and amorphous microtubes when fabricated under an average power density of ca. 1 × 10 8 W/cm 2 and 10 11 W/cm 2, respectively followed by dwelling in water. The crystalline colloidal particles have a relatively high content of Ti 2+ and hence a lower minimum band gap of 3.4 eV in comparison with 5.2 eV for the amorphous state. The protonation on both crystalline and amorphous phase caused defects, mainly titanium rather than oxygen vacancies and charge and/or volume-compensating defects. The hydrophilic nature and presumably varied extent of undercoordination at the free surface of the amorphous lamellae accounts for their rolling as tubes at water/air and water/glass interfaces. The nonstoichiometric titania thus fabricated have potential optoelectronic and catalytic applications in UV-visible range and shed light on the Ti charge and phase behavior of titania-water binary in natural shock occurrence. © 2010 The Author(s).


Han B.,EB Technology Co. | Kim J.,EB Technology Co. | Kim Y.,EB Technology Co. | Jeong K.-Y.,Kongju National University
Journal of the Korean Physical Society | Year: 2012

Electron Accelerators are the most common means of radiation processing, and they are used in diverse industries to enhance the physical and the chemical properties of materials and to reduce undesirable contaminants, such as pathogens or toxic by-products of materials. Fifteen thousand [1,500] electron accelerators are commercially used in the world, and this number is eight or nine times greater than the number of Gamma irradiation facilities. Electron accelerators are reliable and durable electrically-sourced equipment that can produce ionizing radiation when it is needed for a particular commercial use. Electron accelerators were introduced in Korea during the 1970s, firstly for research and later for insulated wire and cable production. At present, over sixty electron accelerators are in commercial use, providing several billion USD annually in Korean industries, mainly for purposes such as, productions of wires, cables, thermo-shrinkable materials, foam sheets, and coating, curing of materials, sterilization of medical products, environmental protection, and others. With the increasing needs in the automobile and electronics industries, applicable areas for electron accelerator will be extended greatly in the future. © 2012 The Korean Physical Society.


Min J.,Korea Advanced Institute of Science and Technology | Pua R.,Korea Advanced Institute of Science and Technology | Kim I.,EB Technology Co. | Han B.,EB Technology Co. | Cho S.,Korea Advanced Institute of Science and Technology
Medical Physics | Year: 2015

Purpose: A beam-blocker composed of multiple strips is a useful gadget for scatter correction and/r for dose reduction in cone-beam CT (CBCT). However, the use of such a beam-blocker would yield cone-beam data that can be challenging for accurate image reconstruction from a single scan in the filtered-backprojection framework. The focus of the work was to develop an analytic image reconstruction method for CBCT that can be directly applied to partially blocked cone-beam data in conjunction with the scatter correction. Methods: The authors developed a rebinned backprojection-filteration (BPF) algorithm for reconstructing images from the partially blocked cone-beam data in a circular scan. The authors also proposed a beam-blocking geometry considering data redundancy such that an efficient scatter estimate can be acquired and sufficient data for BPF image reconstruction can be secured at the same time from a single scan without using any blocker motion. Additionally, scatter correction method and noise reduction scheme have been developed. The authors have performed both simulation and experimental studies to validate the rebinned BPF algorithm for image reconstruction from partially blocked cone-beam data. Quantitative evaluations of the reconstructed image quality were performed in the experimental studies. Results: The simulation study revealed that the developed reconstruction algorithm successfully reconstructs the images from the partial cone-beam data. In the experimental study, the proposed method effectively corrected for the scatter in each projection and reconstructed scatter-corrected images from a single scan. Reduction of cupping artifacts and an enhancement of the image contrast have been demonstrated. The image contrast has increased by a factor of about 2, and the image accuracy in terms of root-mean-square-error with respect to the fan-beam CT image has increased by more than 30%. Conclusions: The authors have successfully demonstrated that the proposed scanning method and image reconstruction algorithm can effectively estimate the scatter in cone-beam projections and produce tomographic images of nearly scatter-free quality. The authors believe that the proposed method would provide a fast and efficient CBCT scanning option to various applications particularly including head-and-neck scan. ©2015 American Association of Physicists in Medicine.


Patent
EB Technology CO. | Date: 2010-06-15

Disclosed is a mobile type electron accelerator which enables a high voltage generator and a beam extraction device irradiating electron beams, and a reactor to be safely placed in containers mounted on trailers of a vehicle having mobility so as to allow a sample (for example, waste water, waste gas, and a sample to be investigated) to be tested in real time while maximally suppressing danger of environmental pollution or radiation exposure, thereby assuring rapidity, field applicability, and accuracy.


PubMed | EB Technology Co. and Korea Advanced Institute of Science and Technology
Type: Journal Article | Journal: Medical physics | Year: 2015

A beam-blocker composed of multiple strips is a useful gadget for scatter correction and/or for dose reduction in cone-beam CT (CBCT). However, the use of such a beam-blocker would yield cone-beam data that can be challenging for accurate image reconstruction from a single scan in the filtered-backprojection framework. The focus of the work was to develop an analytic image reconstruction method for CBCT that can be directly applied to partially blocked cone-beam data in conjunction with the scatter correction.The authors developed a rebinned backprojection-filteration (BPF) algorithm for reconstructing images from the partially blocked cone-beam data in a circular scan. The authors also proposed a beam-blocking geometry considering data redundancy such that an efficient scatter estimate can be acquired and sufficient data for BPF image reconstruction can be secured at the same time from a single scan without using any blocker motion. Additionally, scatter correction method and noise reduction scheme have been developed. The authors have performed both simulation and experimental studies to validate the rebinned BPF algorithm for image reconstruction from partially blocked cone-beam data. Quantitative evaluations of the reconstructed image quality were performed in the experimental studies.The simulation study revealed that the developed reconstruction algorithm successfully reconstructs the images from the partial cone-beam data. In the experimental study, the proposed method effectively corrected for the scatter in each projection and reconstructed scatter-corrected images from a single scan. Reduction of cupping artifacts and an enhancement of the image contrast have been demonstrated. The image contrast has increased by a factor of about 2, and the image accuracy in terms of root-mean-square-error with respect to the fan-beam CT image has increased by more than 30%.The authors have successfully demonstrated that the proposed scanning method and image reconstruction algorithm can effectively estimate the scatter in cone-beam projections and produce tomographic images of nearly scatter-free quality. The authors believe that the proposed method would provide a fast and efficient CBCT scanning option to various applications particularly including head-and-neck scan.

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