에탄올-n-헵탄 공비 혼합물의 분리를 위한 압력변환 증류공정 연구

노상균; Sang Gyun Noh

Clean Technology, Vol.21, No.4, 217-223, December, 2015

DOI10.7464/ksct.2015.21.4.217 Export Citation

에탄올-n-헵탄 공비 혼합물의 분리를 위한 압력변환 증류공정 연구

A Study on the Pressure-Swing Distillation of Ethanol-n-Heptane Azeotrope

노상균^†

동양대학교 생명화학공학과, 750-711 경북 영주시 풍기읍 동양대로 145

Sang Gyun Noh^†

Department of Chemical & Biomolecular Engineering, DongYang University, 145 Dongyangdaero, Punggi-eup, Yeongju-si, Gyeongbuk 750-711, Korea

E-mail:

초록

본 연구에서는 에탄올-n-헵탄 이성분계 공비 혼합물의 분리를 위해 압력변환 증류공정(pressure-swing distillation, PSD)을 사용하여 전산모사 및 공정 최적화를 진행하였다. 저압-고압 컬럼 배열과 고압-저압 컬럼 배열을 통해 고순도 에탄올과 고순도 n-헵탄을 얻기 위한 압력변환 증류공정을 수행하였다. 전산모사 결과, 저압-고압 컬럼 배열 공정보다 고압-저압 컬럼배열 공정을 사용할 경우 heat duty 값이 약 5.8% 정도 감소되어 에너지 소모량 면에서 더 경제적임을 확인할 수 있었다.

In the present study, modelling and optimization of ethanol-n-heptane separation process were performed using pressure-swing distillation. The pressure-swing distillation process optimization was performed to obtain high purity ethanol and high purity n-heptane into a low-high pressure columns configuration and a high-low pressure columns configuration. The results of pressure-swing distillation process simulation and optimization using high-low pressure column configuration showed a reduced total reboiler heat duty at 5.8% which confirmed a more economical energy consumption.

Keywords:Azeotrope;Ethanol;n-Heptane;Pressure-swing distillation

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[1] Raal JD, Code RK, Best DA, J. Chem. Eng. Data, 17(2), 211 (1972)

[2] Pereiro AB, Rodriguez A, Sep. Purif. Technol., 62(3), 733 (2008)

[3] Pereiro AB, Rodriguez A, Ind. Eng. Chem. Res., 48(3), 1579 (2009)

[4] Laroche L, Bekiaris N, Andersen HW, Morari M, Can. I., Chem. Eng., 69, 1302 (1991)

[5] William LL, Chien LI, “Design and Control of Distillation Systems for Separating Azeotropes,” A John Wiley & Sons, Inc., (2010).

[6] Hilmen EK, “Separation of Azeotropic Mixtures: Tools for Analysis and Studies on Batch Distillation Operation,” Ph. D. Thesis, Norwegian University of Science and Technology, Trondheim, Norway, 2000.

[7] “PRO/II TM Keyword Manual,” Invensys Systems, Inc.,(2010).

[8] Renon H, Prausnitz JM, AIChE J., 14(1), 135 (1968)

[9] Soave G, Chem. Eng. Sci., 27, 1197 (1972)

[10] “PRO/II Application Briefs,” Simulation Sciences Inc., (2005).