HWAHAK KONGHAK, Vol.25, No.2, 115-123, April, 1987
ASOG 모델과 NRTL 모델을 사용한 전해질 용액에서의 용매의 활동도
Activities of Solvent in Electrolyte Solutions Using ASOG Model and NRTL Model
초록
30 ℃와 40 ℃에서 가스크로마토그라프를 이용하여 단일용매（water, methanol, ethanol, 1-propanol）에 CaCl2를 첨가한 전해질 용액의 평형증기압을 전해질농도의 전 범위에 걸쳐서 구하였다.
Scatchard-Raymond 식으로 계산된 용매의 활동도를 실험치로 하였다. Group contribution 개념에 의한 ASOG 모델로 활동도를 계산하였으며, 또한 local composition 개념에 의한 NRTL 모델을 사용하여 활동도를 계산하였다.
활동도의 실험치와 두 모델에 의한 각각의 계산치는 좋은 일치를 보이고 있으나 ASOG 모델이 NRTL 모델보다 더욱 양호하였다.
Scatchard-Raymond 식으로 계산된 용매의 활동도를 실험치로 하였다. Group contribution 개념에 의한 ASOG 모델로 활동도를 계산하였으며, 또한 local composition 개념에 의한 NRTL 모델을 사용하여 활동도를 계산하였다.
활동도의 실험치와 두 모델에 의한 각각의 계산치는 좋은 일치를 보이고 있으나 ASOG 모델이 NRTL 모델보다 더욱 양호하였다.
Over the entire range of electrolyte concentration, the equilibrium vapor pressures of an electrolyte solution consisting of a single solvent （water, methanol, ethanol, 1-propanol） and calcium chloride (CaCl2) were obtained by using gas chromatograph at 30 ℃ and 40 ℃.
The Scatchard-Raymond equation was introduced to obtain activities of solvents. These values were compared with those calculated by two theoretical modles : the ASOG model and NRTL model based on the concepts of group contribution and new local composition respectively.
Calculated values by two models and experimental values obtained from Scatchard-Raymond equation were found to be in a good agreement with the ASOG model showing a slightly better fit.
The Scatchard-Raymond equation was introduced to obtain activities of solvents. These values were compared with those calculated by two theoretical modles : the ASOG model and NRTL model based on the concepts of group contribution and new local composition respectively.
Calculated values by two models and experimental values obtained from Scatchard-Raymond equation were found to be in a good agreement with the ASOG model showing a slightly better fit.