Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Measurement and Modeling of Bubble Points for Binary Mixtures of Carbon Dioxide and N,N-Dimethylformamide

이산화탄소와 디메틸포름아마이드 혼합물의 기포점 측정 및 모델링

  • Jung, Joon-Young (Department of Chemical Engineering and Nano-Bio Technology, Hannam University) ;
  • Lee, Byung-Chul (Department of Chemical Engineering and Nano-Bio Technology, Hannam University)
  • 정준영 (한남대학교 생명나노과학대학 나노생명화학공학과) ;
  • 이병철 (한남대학교 생명나노과학대학 나노생명화학공학과)
  • Received : 2011.02.11
  • Accepted : 2011.03.11
  • Published : 2011.03.31
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Abstract

The bubble point pressures of binary mixtures of carbon dioxide ($CO_2$) and N,N-dimethylformamide (DMF) were measured by using a high-pressure experimental apparatus equipped with a variable-volume view cell, at various $CO_2$ compositions in the range of temperatures above the critical temperature of $CO_2$ and below the critical temperature of DMF. The experimental bubble point pressure data were correlated with the Peng-Robinson equation of state (PR-EOS) to estimate the corresponding dew point compositions at equilibrium with the bubble point compositions. The experimentally measured bubble point pressures gave good agreement with those calculated by the PR-EOS. The variable-volume view cell equipment was verified to be an easy and quick way to measure the bubble point pressures of high-pressure compressible fluid mixtures.

본 연구에서는 가변부피 투시창이 설치되어 있는 고압 상평형 측정 장치를 사용하여 이산화탄소의 임계온도 이상과 디메틸포름아마이드(DMF)의 임계온도 이하의 온도 범위에서 혼합물의 조성을 변화시키면서 이산화탄소와 디메틸포름아마이드 혼합물의 기포점 압력을 측정하였다. 실험적으로 측정된 기포점 압력 데이터를 Peng-Robinson 상태방정식에 상관시킴으로써 기포점 조성과 평형을 이루는 이슬점 조성을 추정하였다. 실험적으로 측정된 기포점 압력은 Peng-Robinson 상태방정식으로 계산한 결과와 매우 잘 일치하였다. 가변부피 투시창이 설치되어 있는 고압 상평형 실험장치는 고압의 압축유체 혼합물의 기포점을 매우 쉽고 빠르게 측정할 수 있는 방법이라고 할 수 있다.

Keywords

References

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