http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
황병찬 ( Byung Chan Hwang ),조아라 ( A Ra Jo ),신석재 ( Suk Jae Sin ),최대기 ( Dae Ki Choi ),남석우 ( Suk Woo Nam ),박권필 ( Kwon Pil Park ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.4
Sodium borohydride, NaBH4, shows a number of advantages as hydrogen source for portable proton exchange membrane fuel cells (PEMFCs), The durability of Co-P-B/Cu catalyst for sodium borohydride hydrolysis reaction was studied, The effect of reaction temperature, NaBH4 concentration, NaOH concentration and calcination temperature of catalyst on the durability of Co-P-B/Cu catalyst were measured, The gel formed during hydrolysis reaction affected the durability of catalyst (loss of catalyst), Formation of gel increased the loss of the catalyst. When NaBH4 concentration was high and reaction temperature was higher than 60˚C, loss of catalyst was low because gel was not formed. But under the temperature of 40˚C, loss of catalyst increased due to gel formation When NaBH4 concentration was 40 weight % and the reaction temperature was 40˚C, the loss of catalyst increased as the NaOH concentration increased. As the calcination temperature of catalyst decreased, the loss of catalyst decreased and the activity of catalyst decreased. Calcination of the catalyst at high temperature enhanced the durability of catalyst but diminished the activity of catalyst.
황병찬 ( Byung Chan Hwang ),조재영 ( Jae Young Jo ),신석재 ( Suk Jae Sin ),최대기 ( Dae Ki Choi ),남석우 ( Suk Woo Nam ),박권필 ( Kwon Pil Park ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.5
Sodium borohydride, NaBH4, shows a number of advantages as hydrogen source for portable proton exchange membrane fuel cells (PEMFCs). The hydrogen yield of sodium borohydride hydrolysis reaction was studied. The effect of temperature, NaBH4 concentration, NaOH concentration and catalyst type on the hydrogen yield from NaBH4 hydrolysis reaction were measured. The catalysts of Co-P/Cu, Co-B/Cu and Co-P-B/Cu were used in this study and there was no different effect of these catalysts on the hydrogen yield from NaBH4. Under the temperature of 60 ˚C, the hydrogen yield decreased as NaBH4 concentration increased due to formation of gel with by-products and reactants. The gel formed during NaBH4 hydrolysis reaction diminished the hydrogen evolution rate and total volume of hydrogen. Addition of NaOH stabilizer enhanced the formation of gel and then decreased the hydrogen yield.
효소연료전지의 Anode 제조조건이 성능에 미치는 영향
이세훈 ( Se Hoon Lee ),황병찬 ( Byung Chan Hwang ),이혜리 ( Hye Ri Lee ),김영숙 ( Young Sook Kim ),추천호 ( Cheun Ho Chu ),나일채 ( Il Chai Na ),박권필 ( Kwon Pil Park ) 한국화학공학회 2015 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.53 No.6
Anode는 효소를 이용한 효소전극과 cathode는 PEMFC용 전극을 이용해 효소연료전지를 구동하였다. 효소 anode는 graphite 분말과 효소로서 글루코스 산화제, 전자매개체로 ferrocene을 혼합해 압축해서 만들고 Nafion 이오노머로 코팅하였다. Anode 제조조건을 변화시키며 성능을 측정해 효소 anode 제조 최적조건을 찾았다. 효소 anode 압축 시 최적 압력은 8.89 MPa이고, 효소 anode의 graphite 성분비가 60%일 때 최고의 출력밀도를 나타냈다. Anode 기질 용액의 최적glucose 농도는 1.7mol/l이었다. 효소 anode는 Nafion 용액에 1초, 2회 침지에 의해 안정화되었다. Enzyme fuel cells were operated with cells composed of enzyme anode and PEMFC cathode. Enzyme anodes was fabricated by compression of a mixture of graphite particle, glucose oxidase(Gox) as a enzyme and ferrocene as a redox mediator, and then coated with Nafion ionomer solution. Performances of enzyme unit cell were measured with variation of anode manufacture factors, to find optimum condition of enzyme anode. Optimum pressure was 8.89MPa for enzyme anode pressing process. Highest power density was obtained at 60% graphite composition in enzyme anode. Optimum glucose concentration was 1.7 mol/l in anode substrate solution. The enzyme anode was stabilized by two times of deeping in Nafion solution for 1 sec.
문화의 집 공간이용실태 분석을 통한 개선방안에 관한 연구
정별나(Jeong Byul-na),황병찬(Hwang Byung-chan),진정(Jihn Jung) 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
Ministry of culture and Tourism, as one of policies to improve the state of welfare for locals, has built small-sized houses of culture designated for cultural utilities. However, current styles of "The House of Culture" have not reflected characteristics of its local people as well as Its surroundings, misleading to degenerate inefficient spaces and disposition without spatial distinction. Thus, the study will suggest effectual spatial arrangement and composition through analyzing space uses of "The House of Culture"
Co-P-B/FeCrAlloy 촉매를 이용한 NaBH_4 가수분해 반응
박권필 ( Kwon Pil Park ),황병찬 ( Byung Chan Hwang ),조아라 ( A Ra Jo ),신석재 ( Suk Jae Sin ),최대기 ( Dae Ki Choi ),남석우 ( Suk Woo Nam ) 한국화학공학회 2013 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.51 No.1
Properties of NaBH_4 hydrolysis reaction using Co-P-B/FeCrAlloy catalyst and the catalyst durability were studied. Co-P-B/FeCrAlloy catalyst showed low activation energy such as 25.2 kJ/mol in 5 wt% NaBH_4 solution, which was similar that of noble metal catalyst. The activation energy increased as the NaBH_4 concentration increased. Formation of gel at high concentration of NaBH_4 seriously affected hydrogen evolution rate and the catalyst durability. The catalyst loss decreased as reaction temperature increased due to lower gel formation when the concentration of NaBH_4 was over 20 wt%. Considering hydrogen generation rate and durability of catalyst, the catalyst supported with FeCrAlloy heat-treated at 1000℃ without ultra vibration during dipping and calcination after catalyst dipping was best catalyst. To use catalyst more than three times in 25 wt% NaBH_4 solution, it should be reacted at higher temperature than 60℃.
sPEEK 막으로 제조한 고분자전해질 연료전지(PEMFC) 막전극합체(MEA)의 특성
이혜리 ( Hye-ri Lee ),이세훈 ( Se-hoon Lee ),황병찬 ( Byung-chan Hwang ),나일채 ( Il-chai Na ),이정훈 ( Jung-hun Lee ),오성준 ( Sung-june Oh ),박권필 ( Kwon-pil Park ) 한국화학공학회 2016 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.54 No.2
최근에 저가의 고분자 전해질 연료전지(Proton Exchange Membrane Fuel Cells, PEMFC)용 비불소계 전해질 막 연구개발이 활발히 진행되고 있다. 본 연구에서는 sulfonated Poly(ether ether ketone)(sPEEK)막의 특성을 술폰화도, 상대습도, 단위 전지 온도에 따라 PEMFC 운전 조건에서 비교하였다. I-V 분극곡선, 수소투과도, 전기화학적 표면적, 막 저항 및 부하 전달 저항 등을 측정·분석했다. 술폰화도와 온도, 상대습도가 높을수록 성능이 높았으며, 특히 낮은 슬폰화도와 낮은 상대습도에서 이온 전도도 감소 때문에 성능이 큰 폭으로 감소함을 확인하였다. Recently, there are many efforts focused on development of more economical non-fluorinated membranes for use in PEMFCs (Proton Exchange Membrane Fuel Cells). In this study, characteristics of sulfonated Poly(ether ether ketone) (sPEEK) were compared according to degrees of sulfonation (DS), relative humidity, cell temperatures at PEMFC operation condition. I-V polarization curve, hydrogen crossover, electrochemical surface area, membrane resistance and charge transfer resistance were measured. sPEEK membrane showed high performance at high DS, high temperature and high relative humidity, in particular, performance of sPEEK membrane decreased largely due to low ionic conductivity at low DS and low relative humidity.
고분자 전해질 연료전지에서 sPEEK 막을 이용한 전극과 막 합체(MEA)의 열화에 관한 연구
이혜리 ( Hye-ri Lee ),이세훈 ( Se-hoon Lee ),황병찬 ( Byung-chan Hwang ),나일채 ( Il-chai Na ),이정훈 ( Jung-hun Lee ),오성준 ( Sung-june Oh ),박권필 ( Kwon-pil Park ) 한국화학공학회 2016 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.54 No.3
최근에 저가의 고분자 전해질 연료전지(Proton Exchange Membrane Fuel Cells, PEMFC)용 비불소계 전해질 막 연구개발이 활발히 진행되고 있다. 본 연구에서는 sulfonated Poly (ether ether ketone) (sPEEK) MEA 내구성을 시험하기 위해 열화 가속화 기법을 이용하여 막과 전극이 동시에 열화되는 MEA 열화 실험을 진행하였다. 열화 전과 후에 I-V분극곡선, 수소투과도, 전극 활성 면적, 막 저항과 부하 전달 저항을 측정하여 열화 전과 후를 비교하였다. sPEEK 막의 수소 투과도는 낮았지만, 저가습 OCV 조건에서 발생하는 라디칼에 Nafion과 같은 불소계막보다 sPEEK 막이 약했다. MEA 열화 실험 결과 144시간 후와 271시간 후 성능이 각각 15%와 65% 감소하였다. 144이후 급격한 성능감소의 주요인은 막에 발생한 핀홀의 Pt/C 입자에 의한 shorting 현상이라고 본다. Recently, there are many efforts focused on development of more economical non-fluorinated membranes for PEMFCs (Proton Exchange Membrane Fuel Cells). In this study, to test the durability of sPEEK MEA (Membrane and Electrode Assembly), ADT (Accelerated Degradation Test) of MEA degradation was done at the condition that membrane and electrode were degraded simultaneously. Before and after degradation, I-V polarization curve, hydrogen crossover, electrochemical surface area, membrane resistance and charge transfer resistance were measured. Although the permeability of hydrogen through sPEEK membrane was low, sPEEK membrane was weaker to radical evolved at low humidity and OCV condition than fluorinated membrane such as Nafion. Performance after MEA degradation for 144 hours and 271 hours were reduced by 15% and 65%, respectively. It was showed that the main cause of rapid decrease of performance after 144 hours was shorting due to Pt/C particles in the pinholes.
物質的 想像力에 의한 建築의 價値表現에 關한 硏究 : 바슐라르의 철학적 고찰을 중심으로
黃秉燦,金度淵,晉正 全北大學校 附設 都市및環境硏究所 1996 都市 및 環境硏究 Vol.11 No.1
This study is starting from recognition o substances of which a physical thing is made in Architecture and supposing that traveling of meanings between an architect and a user can be had universality, with Gaston Bachelard's philosophical consideration, this study is to be dealt with the expression of value by the physical power of imagination in Architecture. Specially, a user can be recognition most generally by standing out physical nature of a basic premise as a power's effect, while the existing form and order of, in architecture, the study -centered trend of form. In that way, an architect can keep it in mind what I have on this page briefly above at the planning phase and one thing can be showed here that a physical means can make a matter of riching an architecture mentally possible.
도시형한옥의 주거공간 변화에 관한 연구 : 전주시 풍납동을 중심으로
정성일,황병찬,진정 全北大學校 附設 都市및環境硏究所 2000 都市 및 環境硏究 Vol.15 No.1
This study is on the transition of residential space. The Urban Traditional Housing is a housing that had been built from 1950's in the Jeonju City. It was supplied by private housing developers organized with traditional craftsmen and its form was based on the traditional housing The cause of transition Housing in space are growth of family, rental income, and change of living style. The restriction and socio-cultural changing In this respect this thesis aimes at one of the ways which help dwellers to express themselves more easily and to make them more satisfactory in their houses. For this purpose, the concept of personalization of housing is introduced and its meaning in physical environment is discussed.