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이산화탄소-Tetralin의 이성분계 고압 상평형 연구
Hing pressure Binary Phase Equilibria of Carbon Dioxide-Tetralin System
HWAHAK KONGHAK, June 1992, 30(3), 387-392(6), NONE
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Abstract
본 연구에서는 고압하에서 이산화탄소와 방향족 탄화수소인 tetralin과의 이성분계 상평형데이터를 얻기 위해 실험을 수행하였다. 상평형 실험장치는 circulation type의 장치를 사용하였으며, 분자량이 큰 물질을 낮은 온도에서 실험분석하기 위하여 미량시료채취법을 이용하였다. 장치의 재현성과 정확성을 시험하기 위해 344,2K에서 이산화탄소-tetralin의 상평형 실험을 수행하여 Prausnitz 등의 데이터와 비교하였다. 이산화탄소와 tetralin과의 이성분계 상평형 실험은 온도 344.2K 이외에도 313.2K와 373.2K에서도 수행하였으며, 이 때 압력은 5-6MPa에서 혼합물 임계점근처까지 약 2-3MPa정도의 차이를 두며 실험하였다. 본 연구에서는 기상과 액상에서의 상평형데이터 이외에도 혼합물의 밀도를 측정할 수 있었으며, 동일한 압력에서 액상의 이산화탄소의 용해도는 온도가 증가할수록 감소하였고, 기상에서 tetralin의 용해도는 증가하였다.
High pressure binary bapor-liquid equilibria of carbon dioxide-tetralin system is investigated by using circulation type experimental apparatus which adopt microsampling technique with expended volume measuring system. The apparatus with this analyzing technique was tested by comparing the measured vapor-liquid equilibrium data of carbon dioxide-tetralin at 344.2K with those of Prausnitz et al. The binary phase equililbrium data of carbon dioxide-tetralin was obtained at temperatures of 313.2K and 373.2K in addition to that of 344.2K and pressure from 5-6MPa to near mixture critical pressure. The mixture density data are also obtained by calibrating the accurate volume of sampling loops. The solubility of carbon dioxide in liquid phase decreases and the solubility of tetralin in vapor phase increases as the temperatures increases at constant pressure.
References
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