• 제목/요약/키워드: Green Hydrogen

검색결과 389건 처리시간 0.025초

천연 수소 발생 광물 필터를 이용한 녹조 정화 시스템 (Green Purification System using Natural Hydrogen Generating Mineral Filter)

  • 권유지;박대겸
    • 한국산업융합학회 논문집
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    • 제27권2_2호
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    • pp.475-485
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    • 2024
  • In many regions of Korea, including the Four Major Rivers, the seriousness of the problem of algal blooms due to eutrophication of water quality is being raised.In this study, in order to solve these social problems, we manufactured a filter using natural mineral fusion (red illite, zeolite, germanium ceramic, selenium ceramic, carbon ceramic) and independently developed a tank system for green algae experiments to observe and determine the stages of change in water quality. In order to study ways to improve water quality through quantitative analysis, 1 ton of severely polluted green algae water from the Nak dong River region was stored in a water tank and exposed to ultraviolet rays in the same environment as the Nak dong River. Then, the same environment as the Nak dong River was created. The results were derived from a 5-week water quality test. The results of this experiment confirmed that green-colored cyano bacteria were significantly reduced just by the turbidity results. The results were obtained through a request to the Korea Testing & Research Institute located in Changwon-si, Gyeong sang nam-do. CI-(chlorine ion) and NH3-N(ammonia nitrogen) had the effect of saving every week. The device used in this study was made of natural minerals free of heavy metals that are harmless to the human body and nature through long-term consideration and exploration to kill and prevent various strains living in water. Green purification system using natural hydrogen generating mineral filter were effective a non-chemical and physical methods. The results of this study are one way to contribute to the serious problems caused by green algae in many countries, and will contribute to the water quality environment by preventing the waste of environmental resources, improving the health of the people, and increasing the ability to purify environmental water quality at home and abroad.

125kW 외부개질 용융탄산염 연료전지(ER MCFC) 스택 운전 (The Results of the 125 kW External Reforming Type MCFC Stack Operation)

  • 이정현;김범주;김도형;강승원;김의환;임희천
    • 한국수소및신에너지학회논문집
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    • 제21권5호
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    • pp.419-424
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    • 2010
  • The 125kW external reforming (ER) type molten carbonate fuel cell (MCFC) system for developing a commercial prototype has been operated at Boryeong thermal power plant site since the end of 2009. The system consists of 125kW stack with $10,000 cm^2$ effective area, mechanical balance of plant (MBOP) with anode recycle system, and electrical balance of plant (EBOP). The 125kW MCFC stack installed in December, 2009 has been operated from January, 2010 after 20 days pre-treatment. The stack open circuit voltage (OCV) was 214V at initial load operation, which approaches the thermodynamically theoretical voltage. The stack voltage remained stable range from 160V to 180V at the maximum generating power of 120 kW DC. The stack has been operated for 3,270 hours and operated at rated power for 1,200 hours.

핵자기공명분석법을 이용한 수용성 아민 CO2 흡수제인 MEA의 열적변성 분석 (Thermal Degradation of Aqueous MEA Solution for CO2 Absorption by Nuclear Magnetics Resonance)

  • 최정호;윤여일;박성열;백일현;김영은;남성찬
    • 한국수소및신에너지학회논문집
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    • 제27권5호
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    • pp.562-570
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    • 2016
  • At the carbon dioxide capture process using the aqueous amine solution, degradation of absorbents is main factor to reducing the process performance. Also, degradation mechanism of absorbent is important for understanding the environmental risk, route of degradation products, health risk etc. In this study, the degradation products of MEA were studied to clarify mechanism in thermal degradation process. The degradation products were analyzed using a $^1H$ NMR (nuclear magnetic resonance) and $^{13}C$ NMR. The analysis methods used in this study provide guidelines that could be used to develop a degradation inhibitor of absorbent and a corrosion inhibitor.

수소 분리를 위한 V/YSZ cermet 분리막의 제조 및 안정성 (Fabrication and Stability of V/YSZ Cermet Membrane for Hydrogen Separation)

  • 전성일;박정훈;이상진;최수현
    • 멤브레인
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    • 제20권1호
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    • pp.62-68
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    • 2010
  • Cermet 분리막 제조를 위한 혼합 분말은 60 vol.% vanadium과 $Y_2O_3$-stabilized $ZrO_2$ (YSZ)를 기계적으로 혼합하여 준비하였다. 혼합 분말을 원판으로 압축한 후 진공 분위기에서 $1600^{\circ}C$로 2시간동안 소결하였다. 소결 분리막은 치밀하였고, 브레이징 필러를 이용하여 스테인레스 링에 장착되었다. V/YSZ 분리막의 수소 투과량은 100% 수소를 흘려 $200{\sim}350^{\circ}C$ 범위에서 측정되었다. $350^{\circ}C$, 0.5 bar압력에서 분리막의 양 표면에 균열이 형성되었다. 투과실험 동안에 V/YSZ 분리막의 vanadium은 수소와 반응하여 $V_2H$를 생성하였으며, 이로 인해 분리막이 균열되는 것을 알 수 있었다.

국내외 수전해 기술 및 대규모 실증 프로젝트 진행 현황 (Current Status of Water Electrolysis Technology and Large-scale Demonstration Projects in Korea and Overseas)

  • 백종민;김수현
    • 한국수소및신에너지학회논문집
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    • 제35권1호
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    • pp.14-26
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    • 2024
  • Global efforts continue with the goal of transition to a "carbon neutral (net zero)" society with zero carbon emissions by 2050. For this purpose, the technology of water electrolysis is being developed, which can store electricity generated from renewable energies in large quantities and over a long period of time as hydrogen. Recently, various research and large-scale projects on 'green hydrogen', which has no carbon emissions, are being conducted. In this paper, a comparison of water electrolysis technologies was carried out and, based on data provided by the International Energy Agency (IEA), large-scale water electrolysis demonstration projects were analyzed by classifying them by technology, power supply, country and end user. It is expected that through the analysis of large-scale water electrolysis demonstration projects, research directions and road maps can be provided for the development/implementation of commercial projects in the future.

일본 FH2R 나미에 그린수소타운 사례: 사회기술실험 관점에서 (A Case Study of FH2R Namie Hydrogen Town from the Socio-technical Experiment Perspective)

  • 김하정;박상욱
    • 한국수소및신에너지학회논문집
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    • 제33권6호
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    • pp.674-683
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    • 2022
  • In this study, we examined the case of Fukushima Hydrogen Research Field (FH2R) Namie hydrogen town. We found that the case has three aspects of socio-technical experiment: a living-scale test-bed of hydrogen technologies, activities for enhancing social acceptability, and a designed module for policy transfer to diffuse. This study aims to provide a benchmark for planning a green hydrogen city in near future.

75kW급 연료전지 시스템의 이젝터 설계 및 시험 (The Design and Test of Ejectors for a 75-kW Fuel Cell System)

  • 김범주;김도형;임희천
    • 한국수소및신에너지학회논문집
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    • 제22권5호
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    • pp.678-685
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    • 2011
  • An Ejector enhances system efficiency, are easily operated, have a mechanically simple structure, and do not require a power supply. Because of these advantages, the ejector has been applied to a variety of industrial fields such as refrigerators, power plants and oil plants. In this work, an ejector was used to safely recycle anode tail gas in a 75-kW Molten Carbonate Fuel Cell (MCFC) system at KEPCO Research Institute. In this system, the ejector is placed at mixing point between the anode tail gas and the cathode tail gas or the fresh air. Commercial ejectors are not designed for the actual operating conditions for our fuel cell system. A new ejector was therefore designed for use beyond conventional operating limits. In the first place, a few sample ejectors were manufacured and the entrainment ratio was measured at a dummy stack. Through this experiment, the optimum ejector was chosen. The 75-kW MCFC system equipped with this optimum ejector was operated successfully.

친환경 추진제를 이용한 200N급 엔진의 설계 및 성능에 관한 연구 (A Study on the Design and Performance of a Green Propellant Engine)

  • 이양석;전준수;황오식;고영성;김유;김선진
    • 한국군사과학기술학회지
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    • 제13권6호
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    • pp.1180-1187
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    • 2010
  • In the last decade, hydrogen peroxide has received renewed interest as a green propellant which is non-toxic, environmentally clean and relatively easy to handle. This study was performed to acquire the design technique and combustion performance of a 200N bi-propellant engine using hydrogen peroxide and kerosene. The engine which used a catalytic ignition method was designed and cold flow tests were carried out to investigate atomization characteristics. Combustion tests including a pulse mode operation were performed to investigate the combustion performance on various O/F ratios. The results showed that the combustion efficiency and the repeatability of the engine performance were enough to use as an essential database for the development of a high performance engine.

그린수소 생산을 위한 고성능 고분자 전해질막 전해조 개발 연구 (Developing High-Performance Polymer Electrolyte Membrane Electrolytic Cell for Green Hydrogen Production)

  • Choi, Baeck Beom;Jo, Jae Hyeon;Lee, Yae Rin;Kim, Jungsuk;Lee, Taehee;Jeon, Sang-Yun;Yoo, Young-Sung
    • KEPCO Journal on Electric Power and Energy
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    • 제7권1호
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    • pp.137-143
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    • 2021
  • As an electrochemical water electrolysis for green hydrogen production, both polymer electrolyte membrane (PEM) and alkaline electrolyte are being developed extensively in various countries. The PEM electrolyzer with high current density (above 2 A/cm2) has the advantage of being able to design a simple structure. Also, it is known that it has high response to electrical output fluctuations. However, the cost problem of major components is the most important issue that a PEM electrolyzer must overcome. Instantly, there are platinum group metal (PGM)-based electrocatalysts, fluorine-based polyfluoro sulfuric acid (PFSA) membrane, Ti felt (porous transport layer, PTL) and so on. Another challenging issue is productivity. A securing outstanding productivity brings price benefits of the electrolytic cells. From this point of view, we conducted basic studies on manufacturing electrode and membrane electrode assembly (MEA) for PEM electrolyzer production.

알칼리 수전해를 위한 상용 음이온교환막의 고온 특성 (High Temperature Characteristics of Commercially Available Anion Exchange Membrane for Alkaline Water Electrolysis)

  • 장수연;유철휘;황갑진
    • 한국수소및신에너지학회논문집
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    • 제33권4호
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    • pp.330-336
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    • 2022
  • In order to evaluate the possibility as a separator in alkaline water electrolysis, the high temperature characteristics were evaluated by measuring the membrane resistance and durability of 5 types of commercial anion exchange membranes in 7 M KOH solution and at 80℃. The membrane resistance of AEM membrane measured in 7 M KOH solution and at 80℃ had a lower value of about 8-24 times compared to the other membranes. The durability of AEM membrane tested with the soaking time in 7 M KOH solution and at 80℃ showed a very good stability and that of FAAM40 and FAAM75-PK showed secondly a good stability. The thermal stability with the soaking time in 7 M KOH solution and at 80℃ of FAAM40 and FAAM75-PK membrane analyzed by thermo-gravimetric analysis showed a good stability compared to the other membranes.