• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2005년도 춘계학술대회
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• pp.330-334
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• 2005

고분자 전해질막 연료전지는 운전시 정상적인 성능을 발현하기 이해서 전지 본체 조립 후 초기 활성화 운전이 필요하다. 이러한 활성화 운전을 통해 전해질 사이의 수소이온이동 통로, 반응가스가 반응할 수 있는 촉매까지의 이동 통로, 촉매층내의 전기적 연속성을 확보함으로 연료전지는 최적의 성능을 나타낼 수 있다. 본 연구를 통해 연료전지 활성화에 영향을 미치는 요인을 찾았고, 이를 통해 효과적이고 빠른 활성화 절차에 관한 연구를 수행하였다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2005년도 춘계학술대회
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• pp.223-226
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• 2005

For $CO_2-free$ hydrogen production and better utilization of the produced carbon, catalytic decomposition of methane over rubber-grade carbon blacks manufactured from coal tar was carried out. The catalytic activities of several domestic carbon blacks were compared. A pelletized carbon black exhibited considerably lower activity and activation energy than the fluffy( loose) carbon black of the same grade. This difference is considered due to the binder that was added during pelletization. For pelletized carbon blacks, a tendency was observed that the activity per unit mass of catalyst increased with the specific surface area of the carbon black. Another tendency was also observed that the activation energy increased with the primary particle size or decrease of the specific surface area.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2008년도 춘계학술대회 논문집
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• pp.487-490
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• 2008

Temperature programmed oxidation (TPO) is used to characterize coke species deposited on commercial nickel catalyst, C11-PR during propane pre-reforming. Propane pre-reforming performed under various condition, S/C from 1.5 to 2.5 and temperature from $350^{\circ}C$ to $450^{\circ}C$. There are three kinds of coke species detected by TPO: (i) reactive coke, (ii) coke deposited on metal site and (iii) coke deposited on acid support. Coke deposited on metal and support are minimized although reactive coke is generated at temperature of $400^{\circ}C$ and S/C of 2.0. Reactive coke is expected to remove easily below temperature of $200^{\circ}C$. Therefore, optimized pre-reforming condition for propane is $400^{\circ}C$ and S/C of 2.0.

• 신재생에너지
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• 제2권2호
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• pp.50-59
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• 2006

An experimental and numerical study is carried out to investigate the performance and the efficiency humidifying Membrane Electrolyte Assembly and having the double-layered catalyst in a fuel cell system which is taken into account the physical and thermal concept. Based on the principals of the problem, the equation of electronic charge conservation equation, gas-phase continuity equation, and mass balance equation are used for the numerical calculation. A unit cell for $200cm^2$ MEA is assembled and measured for finding better operational situation. After finding the optimal condition, 10 cell stacked PEMFC is fabricated. For the performance evaluation, V-I and power curves are examined in detail by changing the condition of humidity, temperature, pressure, thickness of catalyst and oxidant. It is found that the power is maximized around 500W at 80A.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.403-405
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• 2009

RF-스퍼터링법을 사용하여 메탄올 산화반응을 위해 박막형 전극을 제조하였다. 전극은 텅스텐 탄화물(WC)과 텅스텐 산화물($WO_3$), 그리고 백금(Pt) 타겟을 이용하였으며 그 구조적 특성과 전기화학적 특성을 TEM(Transmission electron microscopy와 CV(Cyclic Voltametry)를 통하여 촉매적 활성을 측정해 보았다. 같은 양의 백금과의 활성을 비교하고 활성을 확인하였다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.876-879
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• 2009

Fischer-Tropsch 합성 반응과 같은 slurry bubble column reactor에서는 반응 속도를 증진시키기 위해서는 서로 다른 상간의 접촉 면적을 최대화함으로써 물질 전달을 원활하게 유지하여야 한다. 특히 Fischer-Tropsch 합성 반응에서는 반응물인 기체가 촉매로서 기능하는 고체 표면으로의 external mass transfer가 효과적으로 이루어져야 하기 때문에 반응기 내의 기체의 거동뿐만 아니라 고체인 촉매의 분포에 대한 연구가 활발하게 이루어지고 있다. 따라서 본 연구에서는 반응기 내에 기체의 superficial velocity를 변화시키면서 기체의 hold up 뿐만 아니라 고체 입자의 분포특성에 대하여 관찰하였다. Superficial velocity가 증가함에따라 gas hold up의 경우, 일정하게 증가하다가 6 cm/sec 이상에서 그 증가폭이 감소하였다. 즉 6 cm/sec이상에서 turbulent flow regime을 형성하였다. 또한 고체입자의 분포 역시 기체의 superficial velocity가 증가함에따라 보다 균일하게 되는 것을 확인할 수 있었다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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• pp.94.1-94.1
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• 2011

In this work, ordered mesoporous carbons (OMCs) were prepared by the conventional templating method using mesoporous silica (SBA-15) for Pt-Ru catalyst supports in fuel cells. The influence of surface modification on carbon supports on the electrochemical activities of Pt-Ru/OMCs was investigated with different pH. The neutral-treated OMCs (N-OMCs), base-treated OMCs (B-OMCs), and acid-treated OMCs (A-OMCs) were prepared by treating OMCs with 2 M $C_6H_6$, 2 M KOH, and 2 M $H_3PO_4$, respectively. The surface characteristic of the carbon supports were determined X-ray photoelectron spectroscopy (XPS). The electrochemical activities of the Pt-Ru catalysts had been enhanced when the OMCs supports were treated by basic or neutral agents, while the electrochemical activities had been decayed for the A-OMCs supported Pt-Ru.

• 신재생에너지
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• 제1권2호
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• pp.34-40
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• 2005

고분자 전해질막 연료전지는 운전시 정상적인 성능을 발현하기 위해서 전지 본체 조립 후 초기 활성화 운전이 필요하다. 이러한 활성화 운전을 통해 전해질 사이의 수소이온이동 통로, 반응가스가 반응할 수 있는 촉매까지의 이동 통로, 촉매층내의 전기적 연속성을 확보함으로 연료전지는 최적의 성능을 나타낼 수 있다. 본 연구를 통해 연료전지 활성화에 영향을 미치는 요인을 찾았고, 이를 통해 효과적이고 빠른 활성화 절차에 관한 연구를 수행하였다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2006년도 추계학술대회
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• pp.79-82
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• 2006

Fueled by ballooning oil prices, waste plastics are now regarded as being cheap and abundant renewable sources, removing their stigma of dirty wastes Catalytic pryolysis of plastics in liquid phase allows recovery of light fuel oil as well as green treatment of polymerics wastes, and therefore significant efforts have been devoted to this research field. In this study, catalytic Pyrolysis of LDPE was carl ied out in semi-batch reactor which equipped a unit of separation and recirculation. The effect of react ion conditions were examined by analyzing liquid oil yield and carbon number distribution of products

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2007년도 추계학술대회 논문집
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• pp.93-96
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• 2007

Catalytic activities of color and conductive carbon blacks in ethane decomposition for $CO_2-free$ hydrogen production were investigated. The ethane decomposition was carried out in a conventional fixed bed reactor under atmospheric pressure at 973-1173 K for 2 hours. When the decomposition in the presence of carbon black was compared with the non-catalytic thermal decomposition, the former exhibited significantly higher ethane conversion, higher C(s) selectivity and lower ethylene selectivity with small increase of the methane selectivity, which resulted in higher hydrogen yield. This indicates that carbon black is catalytically effective for dehydrogenation of ethane as well as subsequent decomposition of ethylene. All the carbon blacks exhibited stable catalytic activity with time. In durability tests, fluffy N-330 and BP2000 maintained their activities for 36 hours.