• Title/Summary/Keyword: chemical transportation

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A Study on Transportation Route of Chemicals using Quantitative Risk Assessment (정량적 위험성평가를 이용한 화학물질 운송경로에 관한 연구)

  • Byun, Yoon Sup
    • Journal of the Korean Institute of Gas
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    • v.21 no.3
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    • pp.46-52
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    • 2017
  • During the transportation of chemicals, quantitative risk assessment for chemical leakage accidents caused by traffic accidents was carried out and the appropriateness of chemical transportation route was evaluated. The quantitative risk assessment method applied to the chemical leakage accidents that may occur in the chemical handling equipments installed in the workplace was presented and applied to the chemical transportation. By analyzing the number of traffic accidents in transportation vehicles, the probability of chemical leakage accidents during chemical transportation was predicted and applied to the quantitative risk assessment of chlorine gas leakage accidents that may occur when transporting liquified chlorine bombe using vehicles. As a result, the most appropriate route of transporting the liquefied chlorine bombe was suggested on the basis of risk.

A Study on the Risk Evaluation for Chemical Transportation Tank Lorry of Chemical Plant (석유화학 사업장에서 운송 화학물질 위험관리)

  • Kim, Jeong-gon;Byun, Hun-Soo
    • Journal of Korean Society of societal Security
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    • v.1 no.1
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    • pp.53-62
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    • 2008
  • Recently, the potential risks of tank lorry transportation from the petrochemical plant have been increasing, so the research was performed to build up the evaluation criterion of the transportation safety, as well as aggressive risk+assessment of a variety of chemical materials. This research was applied to the Maximum Credible Accident Analysis technique and modeled on the risk management of chemical transportation using the following four steps for risk evaluation, firstly the comparison of representative fype and standard of hand ling chemical materials transported by tank vehicles secondly, specific classification of potential hazards thirdly, grasp and recognition of virtual accident scenario at last, the risk evaluation of virtual accident scenario(qualitative/quantitative - chemical release modeling).

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Hazard Assessment on Chlorine Distribution Use of Chemical Transportation Risk Index (화학물질 운송위험지수를 활용한 염소(Chlorine) 유통 위해성 평가)

  • Kim, Jeong Gon;Byun, Hun Soo
    • Korean Chemical Engineering Research
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    • v.52 no.6
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    • pp.755-767
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    • 2014
  • Chlorine is one of the most produced and most used non-flammable chemical substances in the world even though its toxicity and high reactivity cause the ozone layer depletion. However, in modern life, it is impossible to live a good life without using Chlorine and its derivatives since they are being used as an typical ingredient in more than 40 percent of the manufactured goods including medicines, detergents, deodorant, fungicides, herbicides, insecticides, and plastic, etc. Even if Chlorine has been handled and distributed in various business (small and medium-sized businesses, water purification plants, distribution company, etc.), there have been few researches about its possible health hazard and transportation risks. Accordingly, the purpose of this paper is to make a detailed assessment of Chlorine-related risks and to model an index of chemicals transportation risks that is adequate for domestic circumstances. The assessment of possible health hazard and transportation risks was made on 13 kinds of hazardous chemicals, including liquid chlorine. This research may be contributed to standardizing the risk assessment of Chlorine and other hazardous chemicals by using an index of transportation risks.

Transformation of Semiconductor Nanoparticles into Twisted-Nanoribbons under Light (빛을 이용한 CdTe 나노입자의 자기조립과정을 통한 나노리본으로의 변화)

  • Lee, Seung-Min;Lee, Kisun;Hong, Yeon Ki;Park, Byung Heung;Kim, Ki-Sub
    • Journal of Institute of Convergence Technology
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    • v.3 no.1
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    • pp.51-54
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    • 2013
  • Cadmium telluride(CdTe) nanowires were successfully synthesized from individual nanoparticles via self-assembly and the evolutionary process was investigated. The oxidation of tellurium ions on CdTe nanoparticles resulted in the organization of individual nanoparticle into twisted-nanoribbons. The nanoparticles self-assembled to twisted ribbons under light while nanoparticles under dark transformed to straight nanowires made of several layers of individual nanoparticles. The images of nanoribbons were analysed based on transmission electron microscopy and scanning electron microscopy. The photoluminescence was blue-shifted from 555 to 545nm.

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Development of Handling Guidelines for the Safety and Health of Transporters of Hazardous Chemicals - Focusing on Safety Containers and Packaging for Delivery of Hazardous Chemicals Used for Reagents - (유해화학물질 운반자의 취급안전보건 관리를 고려한 취급기준 마련 - 유해화학물질 시약 등 택배 안전용기 및 포장기준을 중심으로 -)

  • Im, JiYoung;Jeong, JaeHyeong;Sung, HwaKyung;Kwon, YongMin;Ryu, JiSung;Lee, JinHong;Lee, JiHo
    • Journal of Environmental Health Sciences
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    • v.46 no.4
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    • pp.423-432
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    • 2020
  • Objectives: In this study, we analyzed the current state of delivery containers and packages and established handling guidelines to safely transport delivery containers and packages for use in research, testing, and examination reagents. Methods: Handling guidelines were revised in such categories as maintenance of the handling facilities, storage, loading and unloading, containers and packages, transportation, etc. In addition, we analyzed the current state of domestic sales for hazardous chemicals used for research, testing, and examination reagents, and investigated the handling guidelines related to delivery transportation in the USA, EU, and Japan by chemical property. Results: There are 6,160 companies selling hazardous chemicals. Among them, the 476 companies selling reagents for use in research, testing, and examination were investigated. Total amounts handled reached 425,000 tons, contributing to 0.2% of the total. For delivery transportation, internal containers and packaging was specified for chemical properties as follows: within 1 L for flammable gas, within 5 L for flammable liquid, and within 18 L for others. In addition, the maximum size of the outer package was set within 130 cm for total length, width, and height, and no dimension of the packaging could exceed 60 cm. Sixty-four hazardous chemicals with explosiveness or acute inhalation toxicity were prohibited for delivery transportation. Conclusion: Specified handling guidelines for inner and outer containers as well as packaging were regulated for delivery transportation of hazardous chemicals used for reagents. In addition, 64 hazardous chemicals were prohibited for delivery transportation. These are designed to prevent transportation accidents involving hazardous chemicals for reagents and thus protect the safety and health of transporters who handle hazardous chemicals.

Application of Thermodynamic Models for Analysis on SI Thermochemical Hydrogen Production Process (SI 열화학 수소 생산 공정의 분석을 위한 열역학 모델의 적용)

  • Lee, Jun Kyu;Kim, Ki-Sub;Park, Byung Heung
    • Journal of Institute of Convergence Technology
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    • v.2 no.2
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    • pp.30-34
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    • 2012
  • The SI thermochemical cycle process accomplishes water splitting through distinctive three chemical reactions. We focused on thermodynamic models applicable to the process. Recently, remarkable models based on the assumed ionic species have been developed to describe highly nonideal behavior on the liquid phase reactions. ElecNRTL models with ionic reactions were proposed in order to provide reliable process simulation results for phase equilibrium calculations in Section II and III. In this study, the current thermodynamic models of SI thermochemical cycle process were briefly described and the calculation results of the applied ElecNRTL models for phase equilibrium calculations were illustrated for binary systems.

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Extraction of Biomolcules by Ionic Liquids (이온성 액체를 이용한 생물분자의 추출)

  • Lee, Woo Yun;Lee, Yong Hwa;Lee, Jun;Hong, Yeon Ki
    • Journal of Institute of Convergence Technology
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    • v.4 no.2
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    • pp.23-26
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    • 2014
  • As an effective separation method for biomolecules, aqueous two-phase systems based on ionic liquids were suggested. Hydrophobic ionic liquids are more expensive and viscous in spite of their usage in the ionic liquid/water biphasic extraction compared with hydrophilic ionic liquids. In case of aqueous two-phase systems using hydrophilic ionic liquids, they can be diluted in aqueous phase. Experimental results show that aqueous two phase systems can be formed by adding appropriate amount of ionic liquids to aqueous salts solutions. The viscosity of ionic liquid aqueous phase is proportional to the cation chain length in ionic liquids. It is founded that the ionic liquid based aqueous two phase systems are effective for the separation of biomolecules such as acrylic acid.

Properties of the ZnS Thin Film Buffer Layer by Chemical Bath Deposition Process with Different Solution Concentrations and Deposition Time (화학습식공정법을 이용한 용액 농도 및 시간에 따른 ZnS 완충층 특성에 대한 분석)

  • Son, Kyeongtae;Kim, Jongwan;Kim, Minyoung;Shin, Junchul;Jo, Sunghee;Lim, Donggun
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.27 no.5
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    • pp.269-275
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    • 2014
  • In this study, chemical bath deposition method was used to grow Zinc sulfide(ZnS) thin films from $NH_3/SC(NH_2)_2/ZnSO_4$ solutions at $90^{\circ}C$. ZnS thin films have been prepared onto ITO glass. The concentrations of $ZnSO_4$ and $NH_3$ were varied while the concentration of Thiourea was fixed in 0.52 M. Structural, optical, electrical characteristic of ZnS thin films were measured. The physical and optical properties of different ZnS thin films were influenced severely by the concentration of the two reacting chemicals. The optimal concentration of $ZnSO_4$ and $NH_3$ was 0.085 M and 1.6 M, respectively.

Fracture of rock affected by chemical erosion environment

  • Gao, W.;Ge, M.M.
    • Geomechanics and Engineering
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    • v.11 no.3
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    • pp.373-383
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    • 2016
  • As one natural material, the physical and mechanical properties of rock will be affected very largely by chemical erosion environment. Under chemical environment, the strength of rock will be reduced. Considering the effect of the chemical erosion, fracture factor of rock is reduced. The damage variable is applied to express the change of fracture stress. Therefore, the fracture criterion of rock under chemical environment is constructed. By one experiment of rock fracture under chemical erosion environment, the proposed fracture criterion is verified. The results show that, the fracture path by theory is agree with the testing one well.