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배성열,임진남 한국화학공학회 1979 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.17 No.3
1,2-dichloroethane-n-heptane, 1,2-dichloroethane-n-butanol系와 n-heptane-n-butanol系의 混合熱을 15℃, 25℃, 35℃와 45℃에서 測定하였으며 이로부터 partial heats of mixing값들을 구한 후 같은 溫度에서 過剩熱力學的 性質을 計算하였고 partial excess Gibbs free energy를 利用하여 等溫氣液平衡値를 推算하였으며, 이 값을 混合熱로부터 計算된 過剩 Gibbs free energy와 함께 total pressure法으로 計算된 35℃와 45℃에서의 값들과 比較하여 보았고 더욱 150㎜Hg와 300㎜Hg에서 等壓氣液干衡値를 推算하였다. Heats of mixing for the l,2-dichloroethane-n-heptane, 1,2-dichloroethane-n-butanol and n-heptane-n-butanol systems were measured at 15℃, 25℃, 35℃ and 45℃. From the heats of mixing, partial heats of mixing were calculated, and then excess thermodynamic properties for each binary solutions were calculated. Using the partial excess Gibbs free energy, the values of isothermal vapor·liquid equilibrium were estimated. The calculated excess Gibbs free energy and isothermal vapor·liquid equilibrium data from heats of mixing were compared with those by total pressure method at 35 C and 45 C. Furthermore. the isobaric vapor-liquid equilibrium data were estimated at 150㎜Hg and 300㎜Hg.
UNIQUAC , modified UNIQUAC 모델에 의한 삼성분계의 액 - 액 평형에 대한 염효과 예측
배성열,임진남,최중소 한국화학공학회 1986 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.24 No.4
25℃에서 NaCl salt를 포함하지 않은 3성분계 monochlorobenzene(1)-water(2)-acetone(3) 에 대한 염효과를 예측하기 위하여 NaCl salt solution을 각각의 중량분을 5%, 10%, 15%, 20%, 25%로 포화농도까지 제조하여, monochlobenene(1)-NaCl salt solution(2)-acetone(3) 계에 대한 용해도곡선을 측정하여 tie line을 결정하였다. Tie line 데이타는 Eisen-Joffe식에 상호연관시켜 건전성을 판정하였다. 염을 포함한 4성분계 액-액평형 염을 제하면 염을 포함하지 않은 3성분계의 액-액평형으로 된다고 가정하였다. NaCl salt를 첨가한 용해도곡선은 NaCl salt을 첨가하지 않을 때와 비교되었으며, tie line 실험치를 UNIQUAC, modified UNIQUAC 모델에 상호연관시켜 모델 중의 parameter를 결정하고, tie line의 계산치를 예측하였다. 또한 각 농도의 염 수용액에 따른 4성분계의 분배곡선을 결정하여 3성분계에 대한 염효과를 고찰하였다. Binodal curves for monochlorobenzene(1)-NaCl salt solution(2)-acetone(3) were measured to predict salts effect on ternary monochlorobenzene(1)-water(2)-acetone(3) without NaCl salt at 25℃. Tie lines were determined from these binodal curves, and consistency for these data was tested by correlating with Eisen-Joffe equation. NaCl salt solutions were prepared for 5%, 10%, 15%, 20%, 25%, weight percent respectively, toward saturation concenration. It was assumed that quaternary liquid-liquid equilibria with salt were converted to ternary liquid-liquid equilibria without salt if salt were excluded. The binodal curves with NaCl salt were compared with binodal curve without NaCl salt. Experimental tie lines were correlated with UNIQUAC and modified UNIQUAC model, and parameters in each model and the calculated values of tie lines were predicted. Quaternary distribution curves were determined for each salt concentration and salts effect on ternary system were examined.