• 한국신재생에너지학회:학술대회논문집
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• 2010.11a
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• pp.198.1-198.1
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• 2010

고분자전해질 연료전지(PEMFC)의 핵심부품인 스택의 MEA는 전극과 멤브레인 전해질, GDL(Gas Diffusion Layer)로 구성되며, 전극은 Anoth극과 Cathod극으로 나뉘어 각각의 전극 특성에 적합한 전극촉매를 적용하게 된다. Anoth극과 Cathod극은 탄소 지지체 위에 원하는 사양의 희유금속이 도포되어 존재하는데 이들 희유금속은 그 희귀성으로 인해 사용 후 반드시 재사용되어야 한다. 사용된 전극에서의 희유금속 회수는 산침출, 불순물제거, 추출, 탈거 공정으로 이루어지며, 산침출 시 산화제로 사용된 NaOCl로 인한 침출용액 내의 Na+ 이온의 증가는 불순물제거 공정에 의해 반드시 제거되어야 한다. 따라서 본 연구에서는 CCG 방식으로 전극촉매를 GDL에 코팅한 MEA로부터 백금족 희유금속을 회수 시 MEA에 포함되어 있는 소량의 불순물을 제거하고자 한다.

• Journal of the Korean Institute of Gas
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• v.18 no.1
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• pp.1-7
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• 2014

In this study, plasma reformer technology with a LPG injector was investigated. It was developed with injection of LPG fuel and air in a region where the plasma discharge to make the thermal decomposition carbon fuel and to generate additional hydrogen. As a result of reforming test, when power is 70~100W supply, about HC 0.7% of the full reformed gas and hydrogen was generated from 1.2 to 1.5 %.

• 한국신재생에너지학회:학술대회논문집
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• 2007.06a
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• pp.180-183
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• 2007

CO in the reformed gas for proton exchange membrane fuel cell(PEMFC) has a strong tendency to adsorb on the surface of the catalyst and thus to block the sites that hydrogen needs for reactions. Even part per million levels of CO can cause serious poisoning. This CO poisoning can overcome to bleed trace amounts of air into the anode. In this study, we indicated the alteration of stack performance in various CO concentration and then bled a small amount of air. The performance of stack was reduced by increasing CO amount, and recovered by air bleeding. But the air-bleeding have an impact on performance of anode should be further explored.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.28 no.2
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• pp.29-35
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• 2020

In this paper, we established a prediction model of fuel consumption at the aircraft's taxi operation. To look for countermeasures to reduce fuel consumption and carbon emissions, Airbus A380's actual ground taxi data was used. As a result, the number of stops or turnings during the taxi operation was not related to fuel consumption. It was confirmed that the amount of fuel consumption in the taxi operation was the taxi time and the thrust change. It can be confirmed that ground control optimization, which is the result of close cooperation between the control organization and the airline, is absolutely necessary to reduce taxi time and minimize the occurrence of thrust change events.

• Journal of Hydrogen and New Energy
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• v.27 no.4
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• pp.441-446
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• 2016

Alcohols are particularly attractive as alternative fuels because they are a renewable resource. This paper describes the performance and emission characteristics of ethanol and methanol gasoline blended fuels in a spark ignition engine. This experimental results showed that alcohol gasoline blended fuels decreased the torque, brake mean effective pressure, and brake power decreased when alcohol blended fuels were applied to a gasoline engine and also CO, HC and NOx emissions were reduced in accordance with the contents of alcohol contents.

• Particle and aerosol research
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• v.8 no.2
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• pp.69-74
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• 2012

This study describes how successfully a conventional flame aerosol synthesis was used to continuously synthesize Pt-Ru catalysts supported by carbon agglomerates. Nearly spherical catalysts produced in the flame were mainly composed of metallic Pt and Ru with the molar ratio of 1:1 and those sizes were controllable from ~1.5 nm to ~2.0 nm. Nevertheless, only Pt peaks were found from X-ray diffraction experiments, suggesting that amorphous-like Ru was well mixed in the crystalline Pt lattices. It was found from Cyclo-voltamograms and CO stripping experiments that the electrochemical properties of the catalysts are at least comparable to that of a conventional commercial sample.

• 한국신재생에너지학회:학술대회논문집
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• 2008.10a
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• pp.33-36
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• 2008

Cell degradation when anode channels are blocked during cold start up was tested and measured. Proton exchange membrane fuel cell (PEMFC) stacks with several configurations of channel blockages were operated and decay in performance was analyzed. When only channels near hydrogen inlet were blocked, performance was rarely changed. In contrast, significant cell reversal occurred and considerable amount of $CO_2$ was produced when all channels near inlet and outlet were blocked. In the case, it was also observed that performance was severely decreased in the area where hydrogen was not supplied sufficiently.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1995.05a
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• pp.133-140
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• 1995

Cyclone 원리를 이용한 Slagging 연소기술은 접선방향으로 고속공급되는 연소용 공기에 의해 석탄입자가 연소실 벽면에 체류하면서 벽면연소가 이루어지며, 3중 선회 유동장의 형성으로 연료의 체재시간이 길며, 고온연소시킴으로서 석탄중의 회분을 연소기내에서 용융제거하는 석탄 직접연소의 신기술이다. 실험용으로 제작된 75 kW급 Slagging 연소기에서 Alaska subbituminous 탄으로 성능실험을 수행한 결과 탄소전환율이 95% 이상이며 회분의 용융제거 효율은 약 70%인 것으로 판명되었으며, 연료의 적용범위를 확대하기 위해 Roto탄, Ulan탄 및 Roto탄에 국내 무연탄인 장성탄을 20% 혼합한 혼합탄에 대한 연소실험과 Alaska탄 입자크기의 영향도 알아보았다. Slagging 연소기의 개발을 위해 소형 연소기 실험결과와 유동장 해석, Cold model test를 거쳐 현재 1MW급 연소기가 설계, 제작되어 실험하는 단계에 있다.

• Journal of Hydrogen and New Energy
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• v.31 no.6
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• pp.587-595
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• 2020

Nickel-based bimetallic catalysts were investigated for use in direct borohydride/hydrogen peroxide fuel cells. For anode and cathode, PdNi and AuNi catalysts were used, respectively. Nickel-based bimetallic catalysts have been investigated through various methods, such as inductively coupled plasma optical emission spectroscopy, transmission electron microscopy, scanning electron microscopy, and energy dispersive spectroscopy. The performance of the catalysts was evaluated through fuel cell tests. The maximum power density of the fuel cell with nickel-based bimetallic catalysts was found to be higher than that of the fuel cell with the monometallic catalysts. The nickel-based bimetallic catalysts also exhibited a stable performance up to 60 minutes.

• New & Renewable Energy
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• v.20 no.1
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• pp.110-115
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• 2024

Global sustainable energy needs and carbon neutrality goals make hydrogen a key future energy source. South Korea and Japan lead with proactive hydrogen policies, including South Korea's Hydrogen Law and Japan's strategy updates aiming for a hydrogen-centric society by 2050. A notable advance is the solar thermal chemical water-splitting cycle for green hydrogen production, spotlighted by Korea Institute of Energy Research (KIER) and Niigata University's joint initiative. This method uses solar energy to split water into hydrogen and oxygen, offering a carbon-neutral hydrogen production route. The study focuses on international collaboration in solar energy for thermochemical water-splitting and E-fuel production, highlighting breakthroughs in catalyst and reactor design to enhance solar thermal technology's commercial viability for sustainable fuel production. Collaborations, like ARENA in Australia, target global carbon emission reduction and energy system sustainability, contributing to a cleaner, sustainable energy future.