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양현수,조병하,강봉규,이태원 ( Hyun S . Yang,Byoung H . Cho,Bong K . Kang,Tae W . Lee ) 한국공업화학회 1996 공업화학 Vol.7 No.6
Heterogeneous cation exchange membrane(HCEM) was prepared with LLDPE(Linear Low Density Polyethylene) as binder, powdered cation exchange resins(diameter≤ 149μm) as ion-exchange material and glycerol as additive for electrodialysis and electrodeionization system. The weight ratio of (binder/ion exchange)/glycerol was (60 %/40%)/5%, (55%/45)/5%, (50%/50%)/5% and (40%/60%)/5%. The characterization of prepared HCEM was evaluated on mechanical, electrochemical, morphology and ion permeable properties. It was compared with commercial membrane. Electrochemical properties of HCEM of (50%/50%)/5% were very similar to value of IONPURE(commercial membrane), in which ion exchange capacity, ion transfer number and membrane resistance were to be 1.733meq/g, 0.96 and 16.08Ω/cm², respectively. Ion permeability of the membrane was better than that of IONPURE membrane. Compared with IONPURE membrane, the HCEM had a higher tensile strength and lower elongation and modulus, in which HCEM had tensile strength of 62.33kg/cm², elongation of 87.42% and modulus of 658.53kg/cm². The HCEM of (50%/ 50%)/5% was optimum combination.
Aspen Dynamics(TM)와 ACM을 이용한 용융탄산염 연료전지 시스템의 모사 및 제어
전경연 ( Kyoung Yein Jeon ),곽하연 ( Ha Yeon Kwak ),경지현 ( Ji Hyun Kyung ),이태원 ( Tae Won Lee ),문길호 ( Kil Ho Moon ),이기풍 ( Gi Pung Lee ),류아림 ( Ah Rim Yoo ),양대륙 ( Dae Ryook Yang ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.4
Recentincreasing awareness of the environmental damage caused by the CO2 emission of fossil fuelsstimulated the interest in alternative and renewable sources of energy. Fuel cell is a representative example of hydrogen energy utilization. In this study, Molten Carbonate Fuel Cell system is simulated by using Aspen(TM). Stack model is consisted of equilibrium reaction equations using ACM(TM)(Aspen Custom Modeler). Balance of process of fuel cell system is developed in Aspen Plus(TM) and simulated at steady-state. Analysis of performance of the system is carried out by using sensitivity analysis tool with main operating parameters such as current density, S/C ratio, and fuel utilization and recycle ratio. In Aspen Dynamics(TM), dynamics of MCFC system is simulated with PID control loops. From the simulation, we proposed operation range which generated maximum power and efficiency in MCFC power plant.
혈액 투석막에 따른 말초 혈액 단핵세포의 Interleukin 1 , Iterleukin 6 , Tumor necrosis Factor 생산능에 관한 연구
김영훈(Yeong Hoon Kim),임대건(Dae Geon Lim),조현대(Hyun Dae Cho),김양욱(Yang Wook Kim),박원도(Won Do Park),안재형(Jae Hyung Ahn),이태원(Tae Won Lee),임천규(Chun Gyoo Ihm),김명재(Myung Jae Kim) 대한내과학회 1997 대한내과학회지 Vol.52 No.6
N/A Objectives: In order to evaluate the role of these cytokines in biological response induced by blood interaction with hemodialysis membranes. Methodes: We have investigated the IL-1, TNF and IL-6 concentrations in the supernatant of 24-hours cultured peripheral blood mononuclear cells (PBMC) without(spontaneous group) or with broken cuprophan or P1VMA membranes in 9 chronic hemodialyzed patients and 8 healthy controls. The blood samples were drawn before dialysis using following criteria: (a) in last dialytic treatment with PMMA membranes(HDEl), (b) after two weeks of dialytic treatment wih cuprophan membranes(HDE2), Results: In the both of patient group(HDE1 and HDE2) and controls production of IL-l, TNF and IL-6 of PBMC stimulated with cuprophan or PMMA membrane particles was increased compared to those of spontaneous group. IL-1 production of HDE1 stimulated PMMA(99.31±30.15fmol/ml) was significantly higher compared to that of cuprophan(48.43±11.29fmol/ml), TNF production of HDE2 with cuprophan(114.86±38.5lfmoVml) was significantly high compared to that of spontaneous group(52.42±29.94fmol/ml). IL-6 production of HDE2(646.70±103.84fmol/ml) was significantly high compared to that of spontaneous group(385.88±87.03fmoVml). Comparing cytokine production of PBMC, there was a significant correlation between IL-1 and IL-6(r=0.78), IL- 1 and TNF(r=0.78) and TNF and IL-6(r=0,76). Conclusion: Our results show that the interaction of cuprophan or PMMA membranes with blood increase the production of IL-1, TNF and IL-6. We suggest that in patients undergoing routine hemodialysis PBMC are primed by exposure to chronic stimulation.