http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
전해질 첨가제가 알루미늄 - 공기전지의 성능에 미치는 영향
박권필,전해수 ( Gwun Pil Park,Hai Soo Chun ) 한국공업화학회 1998 공업화학 Vol.9 No.1
알루미늄-공기전지의 4M KOH전해질에 아연화합물과 같은 첨가제를 넣어 수소발생 및 알루미늄의 부식에 미치는 영향을 검토하였다. 첨가제중의 아연화합물들은 수소발생과전압을 증가시키고, TPC(tripotasium citrate)와 CaO는 알루미늄표면에 치밀한 막을 형성하여 수소발생속도와 알루미늄부식속도를 감소시켰다 이들 첨가제들에 의해 고순도알루미늄(순도, 99.999%)의 개회로전위는 양의 방향으로, 알루미늄 No 1050(순도, 99.5%)의 개회로전위는 음의 방향으로 약간 이동했다. 개회로전위에서 첨가제는 수소발생속도와 알루미늄 부식속도를 감소시켰으며, 과전압이 증가할수록 수소발생속도가 감소하여 알루미늄의 이용율이 증가하였다. 높은 전류밀도(>100mA/cm²)에서는 TPC/CaO/ZnO 첨가제에 의해 고순도 알루미늄의 이용율이 In,Ga,Tl 합금 알루미늄의 이용율과 비슷하였다. The effects of additives such as zinc compounds in 4M KOH electrolyte of Al-air cell have been studied. Zinc compounds in electrolyte increased hydrogen evolution overpotential and TPC(tripotasium citrate)/CaO formed fine film on aluminum surface, and these additives decreased hydrogen evolution rate and corrosion rate of aluminum. These additives shifted the OCP in the positive direction on high purity aluminum(purity, 99.999%) and in the negative direction on Al No 1050(purity,99.5%). Addition of two or more additives resulted in the prevention or the reduction of corrosion rate and hydrogen evolution at OCP. As the overpotential on Al electrode increased, the hydrogen evolution rate decreased and the utilization of aluminum increased. At high current density(>100mA/cm²), TPC/CaO/ZnO additives increased the utilization of high purity aluminum up to that of aluminum alloys containing indium, gallium and thallium.
알루미늄-공기 전지의 전극성능에 미치는 아연화합물 첨가의 영향
박권필 順天大學校 1995 論文集 Vol.14 No.1
The effect of Zn-compound addition on the Al-anode corrosion and on the cathode performance was investigated. At open circuit voltage Al-anode corrosion rate and hydrogen evolution rate were decreased with Zn-compound addition in 4M KOH electrolyte. Zinc compound(zinc accetate) addition in electrolyte had no influence on the cathode performance in 100 hour unit cell operation.
박권필 순천대학교 공업기술연구소 1995 工業技術硏究所論文集 Vol.9 No.-
Wettability of Ni-Al anode for molten carbonate fuel cell was studied at MCFC anode condition. Meniscus effect was measured by cyclic voltametry in -950~-160mV range and meniscus height was measured at in situ condition. Wettability of Ni-Al anode in molten carbonate(Li/K, 62/38) was larger than that of pure Ni anode. It was seemed that increase of the wettability of Ni-Al anode resulted from LiAlO_2 formation.
우명우,박권필 順天大學校 1999 論文集 Vol.18 No.1
Cyanide wastewater treatment by brown seaweed wastes was studied. From these results we can conclude that most of cyanide in wastewater can be removed by seaweed. Even though longer reaction time required to attain certain level of cyanide removal, using brown seaweed can be an alternative method. Compared to calcium hydroxide treatment, seaweed shows lower removal capacity to that of calcium hydoxide by the factor of 0.7. and reaction time increases by two.
박권필 순천대학교 기초과학연구소 1995 基礎科學硏究誌 Vol.6 No.-
The performance of Ni-Al anode in MCFC was simulated by the filmed agglomerate model, since wettability of Ni-Al anode was similar to that of NiO cathode. The performance of Ni-Al anode simulated by the filmed agglomerate model was affected greatly by the film thickness, and the effect of activation polarization on the anode was similar to that of mass diffusion polarization.
용융탄산염연료전지의 anode 반응에서 물질전달의 영향
전해수,박권필 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.6
용융탄산염연료전지에서 anode의 수소산화 반응에 미치는 물질전달의 영향을 규명하기 위해, 정상상태 분극실험으로 반응물과 생성물의 확산영향을 보았고, Ni 및 Ni-Al anode의 금속투과 수소확산계수를 정전류기법 (galvanostatic method)으로, 그리고 이들의 교환전류밀도를 전이상태 분극실험으로 구하였다. 생성물과 반응물의 확산이 anode의 반응속도에 비슷한 정도로 영향을 주었으며, 알루미늄이 니켈에 첨가됨으로 인해 금속투과 수소의 확산계수와 교환전류밀도가 감소됨을 확인하였고 그리고 수소 확산속도 감소에 따라 교환전류밀도도 감소됨을 알 수 있었다. The effect of mass transfer on the hydrogen oxidation reaction at molten carbonate fuel cell (MCFC) anode were studied. The effects of reactant diffusion and of products diffusion on the rate of the anode racoon were studied with steady-state polarization experiment. The exchange current densities of Ni-anode, Ni-Al anode were obtained by a transient method and diffusivities of hydrogen through these anodes were measured by galvanostatic method in MCFC anode half cell. The effect of products diffusion on the rate of anode reaction was same that of reactant diffusion. It was found that the diffusivities of hydrogen and the exchange current densities of the anodes were decreased by adding aluminum into the nickel anode. It was seemed that decrease of exchange current densitiy resulted from decrease of hydrogen diffusivity through the anode.
Pack Cementation 법으로 제조된 MCFC 용 합금 Anode 의 특성
전해수,박권필,임희천,정하철 한국화학공학회 1998 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.36 No.6
용융탄산염 연료전지(MCFC)용 anode 재질로써 촉매 성능면이나 가격면에서 가장 적합한 것은 Ni이나, 순수한 Ni만으로 제조된 anode는 고온에서 크립(creep)현상이 커서 이의 해결책이 강구되어져야만 한다. 본 연구에서는 이 크립 현상을 감소시키기 위한 한 방법으로 pack cementation 기법을 이용하여 다공성 Ni-anode소재에 Ni-Al, Ni-Cr, Ni-Al-Cr등의 합금 형태(금속간 화합물 또는 고용체)가 되도록 처리한 후 해당 재질들의 크립 특성을 검토하였다. 이때 팩(pack)성분은 증착시키려는 금속 분말과 활성제(NaCl, NH₄Cl), 그리고 비활성 충전물(Al₂O₃)로 구성되었고 온도는 550-900℃의 범위에서 0.5-5시간 동안 반응시켰다. 다공성 Ni 소재에 해당 금속의 증착량은 반응 시간의 제곱근에 비례하는 형태를 나타내었으며 증착량이 증가할수록 다공성 Ni소재 anode의 기공도는 선형으로 감소하였다. 순수한 Ni소재 anode에 비하여 합금 형태 anode는 크립 현상이 크게 감소함을 보였고 특히 Al과 Cr이 동시에 증착된 합금 전극의 수축률이 가장 낮은 1-2%의 값을 보였다. The pack cementation process of metal(Al, Cr) halide vapor on a porous pure Ni-anode substrate for molten carbonate fuel cell was studied to improve creep resistance of the anode substrate. The pack consists of metal powder(Al, Cr or Al-Cr mixture), activator(NaCl or NH₄Cl) and inert filler(Al₂O₃). The pack cementations on the nickel-anode substrate were carried out at 550-900 ℃ for 0.5-5.0 hours. It was found that various intermetallic compounds for Al(Ni₃Al, NiAl, or Ni₂Al₃) and some of solid solution between Ni and Cr were formed on the porous Ni-anode substrate and the deposition weight of metals depending on time was parabolic. The porosity of the alloy anodes(intermetallic or solid solution) decreases linearly with deposition content of metallic additives. The Ni-anodes deposited as Ni-Al intermetallic form and codeposited with Al and Cr showed good performance against creep and its pore structure did not change after pack cementation. The Ni-anode substrate, which Al and Cr were codeposited on, showed about 1 % creep strain under 650 ℃ and 100 psi after 100 hour.