• 제목/요약/키워드: Clean technology

검색결과 2,349건 처리시간 0.028초

철강산업 부생가스를 이용한 고순도 수소 제조 공정의 반응 조건 최적화 (Optimization of Reaction Conditions for the High Purity Hydrogen Production Process Using By-Product Gases in Steel Works)

  • 최한슬;김준우;김우형;김성중;고동준
    • 한국수소및신에너지학회논문집
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    • 제27권6호
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    • pp.621-627
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    • 2016
  • Low-priced hydrogen is required in petrochemical industry for producing low-sulfur oil, and upgrading low-grade crude oil since environmental regulations have been reinforced. Steel industry can produce hydrogen from by-product gases such as Blast Furnace Gas (BFG), Coke Oven Gas (COG), and Linze Donawitz Gas (LDG) with water gas shift (WGS) reaction by catalysis. In this study, we optimized conditions for WGS reaction with commercial catalysts by BFG and LDG. In particular, the influence on activity of gas-hourly-space-velocity, and $H_2O/CO$ ratios at different temperatures were investigated. As a result, 99.9%, and 97% CO conversion were showed with BFG, and LDG respectively under $350^{\circ}C$ High Temperature Shift (HTS), $200^{\circ}C$ Low Temperature Shift (LTS), 3.0 of $H_2O/CO$, and $1500h^{-1}$ of GHSV. Furthermore, 99.9% CO conversion lasted for 250 hours with BFG as feed gas.

이단 적층 흡착탑을 이용한 CO2 PSA 공정 (CO2 PSA Process using Double-Layered Adsorption Column)

  • 이화웅;최재욱;송형근;나병기
    • 청정기술
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    • 제7권1호
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    • pp.51-63
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    • 2001
  • 화력발전소의 연소가스에서 고순도의 $CO_2$를 분리, 회수하는 것을 목적으로, 에너지 비용이 적게 드는 것으로 알려진 PSA(Pressure Swing Adsorption)공정을 이용하였다. 흡착제로서 활성탄 및 제올라이트를 사용하여 연소가스에서 $CO_2$를 회수할 수 있는 장치를 제작하고 이를 조업하는 조건을 확립하고자 하였다. $CO_2$ 회수용으로 적합하지 않다고 알려져 있는 활성탄을 이용하여도 세정단계의 변형을 통한 새로운 사이클을 이용하여 고순도의 $CO_2$를 생성물로 얻을 수 있었다. 또한 활성탄과 제올라이트 각 흡착제의 흡착특성을 이용하여 이들 두 흡착제의 장점을 최대로 이용할 수 있도록 흡착탑의 일부만을 제올라이트 13X를 채워 조업하는 2단 적층 흡착탑을 이용하여 회수율의 향상을 얻을 수 있었다. 흡착탑의 도입부 쪽에 활성탄을, 배출부 쪽에 제올라이트를 채움으로써 최대의 효과를 얻을 수 있었는데, $CO_2$ 농도 13%, 유량 10 SLPM, 흡착압력 2.2기압에서 제올라이트를 부피비로 25%만 사용하여도 40%의 회수율 향상을 얻을 수 있었으며 50%를 이용한 경우에는 회수율이 67%까지 증가하였는데 이는 제올라이트만을 이용한 경우의 회수율과 비슷한 결과였다.

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Wafer 낱장 반송용 이동 로봇의 개발 (Clean mobile robot for wafer transfer)

  • 성학경;이성현;김성권
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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    • pp.161-161
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    • 2000
  • The clean mobile robot for wafer transfer is AGV that carry each wafer to each equipment. It has wafer handling technology, wafer ID recognition technology, position calibration technology using vision system, and anti-vibration technology. Wafer loading/unloading working accuracy is within ${\pm}$1mm, ${\pm}$3$^{\circ}$. By application of this AGV, we can reduce the manufacturing tack time and bring cost down of equipment.

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HACCP의 환경 최적화를 위한 식품 클린룸 설계에 관한 연구

  • 원영재
    • 공기청정기술
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    • 제23권3호
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    • pp.1-9
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    • 2010
  • This study proposed the optimum design values for the biological clean room system observing the regulations of Hazard Analysis Critical Control Point (HACCP). Even though the standard for industrial clean room system has been well established, the basis for biological food clean room system is the first stage. In order to prevent the contaminations in advance for food storages, processes, and distributions, the criterion of Hazard Analysis Critical Control Point is positively required. This study also suggested the possible ways of how to avoid the hazardous contaminations.

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용액 공정 CIGS 박막 태양 전지를 이용한 물 분해 수소 생산 (Electrolytic Hydrogen Production Using Solution Processed CIGS thin Film Solar Cells)

  • 전효상;박세진;민병권
    • 한국수소및신에너지학회논문집
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    • 제24권4호
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    • pp.282-287
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    • 2013
  • Hydrogen production from water using solar energy is attractive way to obtain clean energy resource. Among the various solar-to-hydrogen production techniques, a combination of a photovoltaic and an electrolytic cell is one of the most promising techniques in term of stability and efficiency. In this study, we show successful fabrication of precursor solution processed CIGS thin film solar cells which can generate high voltage. In addition, CIGS thin film solar cell modules producing over 2V of open circuit voltage were fabricated by connecting three single cells in series, which are applicable to water electrolysis. The operating current and voltage during water electrolysis was measured to be 4.23mA and 1.59V, respectively, and solar to hydrogen efficiency was estimated to be 3.9%.

청정수소 생산 방식 도입에 따른 LCA 기반 탄소중립 기여도 평가 (An Evaluation of Net-zero Contribution by Introducing Clean Hydrogen Production Using Life Cycle Assessment)

  • 장소정;정대웅;김정열;황용우;안희경
    • 한국수소및신에너지학회논문집
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    • 제35권2호
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    • pp.175-184
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    • 2024
  • This study focuses on investigating the importance of managing greenhouse gas emissions from global energy consumption, specifically examining domestic targets for clean hydrogen production. Using life cycle assessment, we evaluated reductions in global warming potential and assessed the carbon neutrality contribution of the domestic hydrogen sector. Transitioning from brown or grey hydrogen to blue or green hydrogen can significantly reduce emissions, potentially lowering CO2 equivalent levels by 2030 and 2050. These research findings underscore the effectiveness of clean hydrogen as an energy management strategy and offer valuable insights for technology development.

KEPCO-China Huaneng Post-combustion CO2 Capture Pilot Test and Cost Evaluation

  • Lee, Ji Hyun;Kwak, NoSang;Niu, Hongwei;Wang, Jinyi;Wang, Shiqing;Shang, Hang;Gao, Shiwang
    • Korean Chemical Engineering Research
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    • 제58권1호
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    • pp.150-162
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    • 2020
  • The proprietary post-combustion CO2 solvent (KoSol) developed by the Korea Electric Power Research Institute (KEPRI) was applied at the Shanghai Shidongkou CO2 Capture Pilot Plant (China Huaneng CERI, capacity: 120,000 ton CO2/yr) of the China Huaneng Group (CHNG) for performance evaluation. The key results of the pilot test and data on the South Korean/Chinese electric power market were used to calculate the predicted cost of CO2 avoided upon deployment of CO2 capture technology in commercial-scale coal-fired power plants. Sensitivity analysis was performed for the key factors. It is estimated that, in the case of South Korea, the calculated cost of CO2 avoided for an 960 MW ultra-supercritical (USC) coal-fired power plant is approximately 35~44 USD/tCO2 (excluding CO2 transportation and storage costs). Conversely, applying the same technology to a 1,000 MW USC coal-fired power plant in Shanghai, China, results in a slightly lower cost (32~42 USD/tCO2). This study confirms the importance of international cooperation that takes into consideration the geographical locations and the performance of CO2 capture technology for the involved countries in the process of advancing the economic efficiency of large-scale CCS technology aimed to reduce greenhouse gases

반도체 클린룸용 에어와셔 외기공조시스템의 에너지소비량에 관한 실험적 연구 (An Experimental Study on Energy Consumption of Air Washer Outdoor Air Conditioning Systems for Semiconductor Manufacturing Clean Rooms)

  • 김기철;김형태;송근수;유경훈;손승우;신대건;박덕준
    • 설비공학논문집
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    • 제24권4호
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    • pp.297-305
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    • 2012
  • In recent large-scale semiconductor manufacturing clean rooms, the energy consumption of outdoor air conditioning systems to heat, humidify, cool and dehumidify incoming outdoor air represents about 45% of the total air conditioning load required to maintain a clean room environment. Therefore, the energy performance evaluation and analysis of outdoor air conditioning systems is useful for reducing the outdoor air conditioning load for a clean room. In the present study, an experiment was conducted to compare the energy consumption of outdoor air conditioning systems with a simple air washer, an exhaust air heat recovery type air washer and a DCC return water heat recovery type air washer. It was shown from the present lab-scale experiment with an outdoor air flow of 1,000 $m^3/h$ that the exhaust air heat recovery type and DCC return water heat recovery type air washer outdoor air conditioning systems were more energy-efficient for the summer and winter operations than the simple air washer outdoor air conditioning system and furthermore, the DCC return water heat recovery type one was the most energy-efficient in the winter operation.

Bio Clean Room(BCR)의 멸균을 위한 산소 클러스터이온 발생 장치 개발에 관한 연구 (A Study on the Development of Oxygen Cluster Ion Generator for Sterilization of Bio Clean Room(BCR))

  • 박동일;정광섭;김영일;김성민
    • 설비공학논문집
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    • 제25권1호
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    • pp.7-13
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    • 2013
  • Bio Clean Room(BCR) and pharmaceutical product manufacturing facilities require careful assessment of many factors, including HVAC, controls, room finishes, process equipment, room operations, and utilities. Flow of equipment, personnel, and product must also be considered along with system flexibility, redundancy, and maintenance shutdown strategies. It is important to involve designers, operators, commissioning staff, quality control, maintenance, constructors, validation personnel, and the production representative during the conceptual stage of design. Critical variables for room environment and types of controls vary greatly with the clean space's intended purpose. It is particularly important to determine critical parameters with quality assurance to set limits and safety factors for temperature, humidity, room pressure, and other control requirements. In this paper, oxygen cluster ion equipment was utilized in order to enhance the indoor air quality and to prevent the airborne infection of ward in hospital. Moreover, the performance test of the equipment was also performed in order to develop the optimal sterilization system of BCR using the equipment.

제품설계와 환경 (Product Design and Environment)

  • 홍순성
    • 청정기술
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    • 제6권1호
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    • pp.1-6
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    • 2000
  • 현재 우리나라에서는 제품 설계 단계에서, 기능 설계와 제품의 생산 문제를 동시에 해결하려는 concurrent engineering이 발전되고 있고, 여기에 추가하여 environment의 영향을 고려한 concurrent 설계의 개발이 필요한 시기가 되었다. 청정 기술이 제품 설계단계에서 활용될 수 있는 예를 제시한다. 또한 design engineer가 환경문제를 해결하게 하기 위하여는, 기초기능 specification 단계부터, 제품별 환경 spec과 같은 data base가 PC에서 쉽게 점할 수 있도록 청정기술자의 도움이 필요하다.

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