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이중구조 촉매전극을 이용한 알칼리 연료전지에 관한 연구
노용우,이태희,설용건,장의종,김경림 연세대학교 산업기술연구소 1990 논문집 Vol.22 No.1
An experimental low-temperature low-pressure hydrogen-oxygen alkali fuel cell was constructed and its performance was tested for various operating conditions. Hydrogen was used for fuel and oxygen was used for oxidant and KOH solution was used for electrolyte. Both electrodes for hydrogen and oxygen were prepared by the same method and the materials used were carbonyl nickel and ammonium bicarbonate. Experimental results show that maximum current density of 8.91 mA/㎠ was obtained at 40℃ wt% KOH solution and optimum power was 1.74 mW/㎠ at 6.43 mA/㎠ current density.
연료전지의 인산전해질 함유를 위한 Marix 제조에 관한 연구
이승훈,설용건,이태희 연세대학교 산업기술연구소 1992 논문집 Vol.24 No.2
The matrix used for the electrolyte of fuel cell was fabricated by using the powder of having different particle size SiC(Silicon Carbide). About the above fabricated matrix, the pore structure and acid absorbancy were measured, and the performance was finally tested at On-Cell. In making matrix, teflon was used as its binder, and in the case of adding 10w/o, matrix could be made in the form of the sheet of 0.2~0.3mm in width. As the result of having made matrix, in the case of 1μm of it, its porosity of 61% was highest; the smaller the size of its particle was, the more increasing pore volume became; the more increasing the content of teflon got, the more decreasing pore volume became. The acid absorbancy of matrix became saturated with acid after six hours, and in the case of 1 μm matrix its acid absorbancy was highest. The highest performance of the matrix with 1μm particle resulted from the measurement of the performance of the On-Cell also the current density of 75mA/cm2at 700mV.
김성엽,설용건,이태희,노용우 연세대학교 산업기술연구소 1991 논문집 Vol.23 No.2
Pore structure and acid absorbancy of carbon electrode of phosphoric acid fuel cell were studied by varying carbon black, PTFE loading, and fabricating method for Denka black. Results showed that the primary pore(micro pore) of the carbon electrode included the micro space formed around the carbon particles regardless of the carbon black(Vulcan XC-72 and Denka black) used, and that addition of PTFE and pressing of electrode influenced mainly the secondary proe. The acid absorbancy of electrode was decreased as PTFE loading was increased and Denka black showed more hydrophobic than Vulcan XC-72 with three times in saturation time and one-half in acid absorbancy.
정경택,설용건 연세대학교 산업기술연구소 1994 논문집 Vol.26 No.2
Synthesis of potassium titanate powders and fibers have been studied according to various synthetic method-melting method, rapid cooling method and flux method. Potassium hexa titanate was synthesiezed over the temperature range 950-1050℃, within 10hrs. Potassium tetra titanate was synthesiezed at 900℃ for 72hrs, by melting method. In rapid cooling method, potassium hexa titanate was grown with the dimension of 0.01mm(diameter) X 1mm(length). The potassium hexa titanate fibers with the maximum size of 0.05mm(diameter) X 4mm(length) was grown in case of flux method. Recooling method and seed method by using potassium hexa titanate as seed produced more and longer size of fibers than the case of slow cooling method.
안경한,설용건 연세대학교 산업기술연구소 1991 논문집 Vol.23 No.2
Kinetic models of TiN deposition from TiCl₄, N₂, H₂ gas in PECVD reactor were developed and evaluated with experimental results by reference. The model postulated several dissociation steps of the TiCl₄ as follows; TiCl₄ →TiCl₃ and TiCl₂, (1), TiCl₄→TiCl ₃ (2), TiCl₄ →TiCl₂ (3), Those deposition reactions were established by Riedel-Eiley mechanism. The model equations were solved by non-linear regression analysis in IMSL Math Library. Estimated results based on (1) and (2) were fitted well. The effect of H₂ and N₂ on TiN formation was also successfully explained.
Cu-SiO₂촉매상에서 메탄올의 메틸포메이트로의 탈수소 반응에 관한 연구
김경림,박해경,설용건,이태희,전민기 연세대학교 산업기술연구소 1990 논문집 Vol.22 No.2
Cu-SiO₂촉매상에서 구리의 함량을 달리하며 메탄올을 반응물질로 하여 탈수소 반응을 고정층 연속흐름 반응기에서 행하였다. 조작조건의 범위는 온도 175∼250℃, 압력 ?? 접촉시간 0.013∼0.043g.cat.hr/mL이었다. 구리의 함량에 따라 전화율과 선택도가 달라지고 구리의 함량이 1.5wt.%일 때 메틸포메이트로의 수율이 가장 좋았다. 최적 조작 조건은 온도와 접촉시간이 각각 225℃, 0.033g.cat.hr/mL 부근이었다. 이온 교환법으로 제조된 1.5wt.% Cu-SiO₂촉매상에서 메탄올의 탈수소 반응의 활성화 에너지는 3.73kcal/mol이었다. The dehydrogenation of methanol to methylformate was studied over Cu-SiO₂catalyst prepared by ion-exchange method with the change of copper content in a fixed bed, continuous flow reactor. The ranges of experimental conditions were : at the temperature between 175℃ and 250℃, pressure at ??, and contact time between 0.013 and 0.043g.cat.hr/mL. Conversion and selectivity were changed with Cu content and yield of methylformate showed the highest value with 1.5wt.% Cu. The optimum conditions were 225℃, 0.033g.cat.hr/mL for reaction temperature and contact time, respectively. The activation energy of dehydrogenation of methanol to methylformate was 3.73kcal/mol over 1.5wt.% Cu-SiO₂.
Yong-Gun Shul,Ulziidelger Byambasuren,Yu Kwon Jeon,Dorjgotov Altansukh,Yunseong Ji 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.6
The particle size effect of N-doped mesoporous carbon was investigated for ORR activity in acid condition and for issue of a mass transfer and gas diffusion in PEMFCs. As for a non-Pt ORR catalyst, nitrogen (N)-doped ordered mesoporous carbons (OMCs) with a various particle sizes with the range of the average 20, 45 and 75 μm were synthesized by the precursor of polyaniline for the N/C species, and a mesoporous silica template was used for the physical structure for preparation of nitrogen doped OMCs. The N-doped mesoporous carbons are promoted by a transition metal (Fe) to improve catalytic activity for ORR in PEMFCs. All the prepared carbons were characterized by via scanning electron microscopy (SEM), and to evaluate the activities of synthesized doped carbons, linear sweep was recorded in an acidic solution to compare the ORR catalytic activities values for the use in the PEMFC system. The surface area and pore volume were increased as the particles decreased, which was effective for the mass transfer of the reactant for higher activity at the limiting current regions.
Formation of Zeolite A Film on Metal Substrates by Microwave Heating
Shul, Yong Gun,Lee, Kwang Soon,Koo, Kee Kahb,Hwang, Un Yeon,Baek, Dong Ryul 한국공업화학회 2001 Journal of Industrial and Engineering Chemistry Vol.7 No.4
Microwave heating was applied to the formation of zeolite A films on copper (Cu) and stainless steel (SUS) substrates. It was confirmed that crystallization time by microwave heating was much smaller than that by conventional heating due to the rapid dissolution of gel, nucleation and growth of zeolite crystals. It was found that the film formation was primarily influenced by surface properties of the metal substrates: a dense film of zeolite A crystals with the size of about 0.3∼1.0㎛ was formed on Cu substrates. However, no layer-like zeolite film was formed on the SUS substrate. Nucleation of zeolite A crystals on metal substrates was also found to be strongly affected by the heating method and pretreatment of synthesis solution.