http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
조경원,최재하,정석,김경일,홍태환,안중우 한국수소및신에너지학회 2013 한국수소 및 신에너지학회논문집 Vol.24 No.3
The separation of hydrogen depends on porosity, diffusivity and solubility in permeation membrane. Dense membrane is always showing a solution diffusion mechanism but porous membrane is not showing. Therefore, porous membrane has a good hydrogen flux due to pore is carried out transferred media. This mechanism is named as the Knudsen diffusion. Hydrogen molecules or hydrogen atoms are diffused along pore that is a mean free path. In this study, complex layer hydrogen permeation membrane was fabricated by hot press process. And then, it was evaluated and calculated to relationship between hydrogen permeability and membrane porosity.
분리막 혐기성 반응조를 이용한 하수슬러지로부터의 VFA 생성과 수소생성 가능성 평가
차기철 ( Cha Gi Cheol ),정태영 ( Jeong Tae Yeong ),정형근 ( Jeong Hyeong Geun ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.6
Characteristics for hydrogen and VFA production (volatile fatty acid) from waste activated sludge was investigated using two stage reactor (acid formation reactor; first stage, photosynthetic reactor; second stage). The acid reactor used Submerged and external separation membrane. The photosynthetic reactor connected with the acid reactor. The COD removal rate in acid formation reactor with submerged and external separation membrane showed about 55% and 75%, respectively. The total VFA produced more in acid reactor with external separation membrane than in acid reactor with submerged separation membrane. The influent COD removal rate per total VFA production rate showed about 11% and 18%, respectively. Hydrogen gas production was not showed in acid reactor but showed in photosynthetic reactor. The hydrogen production per T-VFA in photosynthetic reactor connected with submerged and external separation membrane acid reactor showed about 50.1 ㎖ H₂/g T-VFA and 160.5 ㎖ H₂/g T-VFA, respectively. The Y value in steady state condition of photosynthetic reactor connected with submerged and external separation membrane acid reactor showed about 0.0028 ㎎-biomass ㎎-substrate- and 0.0004㎎-biomass . ㎎-substrate-` , respectively.
수소분리용 BaCe_0.9Y_0.1O_2.95 및 SrCe_0.9Y_0.1O_2.95 분말 합성 및 분리막 증착
강경민,윤영훈 한국수소및신에너지학회 2011 한국수소 및 신에너지학회논문집 Vol.22 No.6
Mixed-conducting oxide powders, BaCe_0.9Y_0.1O_2.95 (BCY) and SrCe_0.9Y_0.1O_2.95 (SCY) powders have been prepared by a solid-state reaction method. Xray diffraction patterns of the prepared powders showed the sharp peaks of the BaCe_0.9Y_0.1O_2.95 and SrCe_0.9Y_0.1O_2.95 phases. The oxide powders that were prepared by attrition milling showed rather large particles and severe necking between particles in FE-SEM images as well as residual reactant (BaCO_3) and secondary phases (SrCeO_3 and CeO_2) in XRD patterns. The oxide powders prepared using ball milling showed particles under approximately 500 nm and typical XRD patterns of the BaCe_0.9Y_0.1O_2.95 and SrCe_0.9Y_0.1O_2.95 phases. Ceramic membranes of the BaCe_0.9Y_0.1O_2.95 and SrCe_0.9Y_0.1O_2.95phases were fabricated by the aerosol deposition method using the oxide powders synthesized.
에어로졸 증착법(Aerosol Depostion method)에 의한 Ba(Ce0.9Y0.1)O3-δ - Ni 수소분리막 제조
박영수,변명섭,최진섭,김진호,황광택 한국수소및신에너지학회 2010 한국수소 및 신에너지학회논문집 Vol.21 No.2
BCY(Ba(Ce0.9Y0.1)O3-δ) oxide, shows high protonic conductivity at high temperatures, and are referred to as hydrogen separation membrane. For high efficiency of hydrogen separation (H2 flux and selectivity) and low fabrication cost, ultimate thin and dense BCY-Ni layer have to be coated on a porous substrate such as ZrO2. Aerosol depostion (AD) process is a novel technique to grow ceramic film with high density and nano-crystal structure at room-temperature, and would be applied to the fabrication process of AD integration ceramic layer effectively. XRD and SEM measurements were conducted in order to analyze the characteristics of BCY-Ni membrane fabricated by AD process.
김상경 한국수소및신에너지학회 2020 한국수소 및 신에너지학회논문집 Vol.31 No.6
There is growing interest worldwide in a hydrogen economy that uses hydrogen as an energy medium instead of hydrocarbon-based fossil fuels as a way to combat climate change. Since hydrogen has a very low energy density per unit volume at room temperature, hydrogen must be compressed and stored in order to use as an energy carrier. There are mechanical and non-mechanical methods for compressing hydrogen. The mechanical method has disadvantages such as high energy consumption, durability problems of moving parts, hydrogen contamination by lubricants, and noise. Among the non-mechanical compression methods, electrochemical compression consumes less energy and can compress hydrogen with high purity. In this paper, research trends are reviewed, focusing on research papers on electrochemical hydrogen compression technology, and future research directions are suggested.
황광택(Hwang, Kwang-Taek),정훈(Cheong, Hun) 한국신재생에너지학회 2005 신재생에너지 Vol.1 No.4
수소 여과용 치밀질 membrane의 제조는 기존의 SC(SrCeO₃)보다 높은 여과특성을 가지는 BC(BaCeO₃)구조의 재료를 이용하여 시편을 제조하였고, 시편의 물성은 기공율, 수분에 대한 내구성 그리고 여과 특성을 측정하였다. 우선 열적 안정성 및 수분에 대한 내구성 향상은 Y₂O₃를 0.1mol첨가 하였을 때 1% 이내의 기공율을 가지고 있었으며 수분에 대한 안정성을 위해 boiling test에서도 균열이 발생되지 않고 안정적인 것을 확인할 수 있었다. 또한 여과 특성을 향상시키기 위해 Ce과 치환이 가능하고 전도성을 향상시킬 수 있는 Ga₂O₃, La₂O₃을 치환하여 물성을 측정한 결과 Ga₂O₃은 0.05, La₂O₃ 0.1mol%가 최적이었으며, 이들 중 Ga₂O₃가 0.05mol 첨가 되었을 때 가장 높은 이온 전도도 값을 얻었으며, La₂O₃이 첨가된 경우가 다음으로 높게 나타났다. 전자 전도성을 높이기 위하여 Pt를 sol로 만들어 나노 입자로 분산 시키는 방법으로 실험을 실시 500?C 이상의 온도에서는 복합전도에 의해 전도도가 향상되어지는 것을 확인할 수 있다. 또한 이들 시편의 여과 특성을 측정한 전도도 측정의 결과와 동일한 결과를 얻을 수 있었다.