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Search / Korean Journal of Chemical Engineering
HWAHAK KONGHAK,
Vol.36, No.4, 502-509, 1998
회분식 증류탑을 이용한 아세톤-메탄올-2-프로판올계의 농도분포 및 Murphree 효율
Concentration Profiles and Murphree Efficiencies of Acetone-Methanol-2-Propanol System in a Batch Distillation Column
김정근, 김석종, 주동표
내경이 10㎝이고 10개의 단으로 구성된 다공판 증류탑을 사용하여 acetone-methanol-2-propanol계의 농도분포를 실측하고 계산치와 비교하였다. 실험은 1기압, 2.8gmol/min의 증기속도 및 전환류 조건하에 수행되었다. 삼성분계의 농도 분포는 AIChE, Zuiderweg, Harris 경험식에 의한 이성분계의 전달단위수 사용, 실측한 이성분계의 단효율을 이용한 Maxwell-Stefan식의 수치해 그리고 세 성분에 동일한 단효율을 적용한 5가지 방법으로 추정하였다. 계산치는 실측치와 전반적으로 잘 부합하였으며 특히 AIChE방법이 실측치를 0.32% 오차 이내로 잘 모사하였다. 각 성분의 Murphree 효율은 60% 내외로 모든 단에서 거의 동일하였으나 methanol의 경우 탑내농도가 최대가 되는 단에서는 불연속적인 단효율을 나타내었다.
Concentration profiles of acetone-methanol-2-propanol system, obtained experimentally using a 10 cm I.D.-, 10 stages sieve-plate distillation column, were compared to theoretical profiles. The experiments were performed under 1atm, total reflux condition and 2.8 gmol/min of vapor boil-up rate. Theoretical profiles were calculated by five different methods : use of binary number of transfer units estimated AIChE, Zuiderweg and Harris empirical correlations, numerical integration of the Maxwell-Stefan equation and use of constant Murphree efficiency for all components. All theoretical profiles were found to give good agreement with experimental ones, among which the profiles obtained using AIChE method showed the excellent coincidence within 0.32% AAD. Being about 60%, the component Murphree efficiencies were similar in most stages but discontinuity in efficiency for methanol was observed for such stage showing the maximum concentration in the column.
Keywords: Ternary Batch Distillation; Concentration Profiles; Murphree Efficiency; Number of Transfer Units; Maxwell-Stefan Equation
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[Cited By]
  1. Kim BH, Lee SB, Choi MJ, Kim SH, Journal of the Korean Industrial and Engineering Chemistry, 12(3), 340, 2001
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