A Study on the Simulation of Toluene Recovery Process using Sulfolane as a Solvent

Sulfolane 용매를 이용한 톨루엔 회수공정의 모사에 관한 연구

  • Cho, Jungho (Department of Chemical Engineering, Dong Yang University)
  • 조정호 (동양대학교 생명화학공학과)
  • Received : 2005.10.22
  • Accepted : 2006.01.30
  • Published : 2006.04.30

Abstract

In this study, computer modeling and simulation works were performed to obtain nearly pure toluene product from toluene containing non-aromatic compounds using sulfolane as a solvent through an extractive distillation process. NRTL liquid activity coefficient model was adopted for phase equilibrium calculations and Aspen Plus release 12.1, a commercial process simulator, was used to simulate the extractive distillation process. In this study, it was concluded that the toluene product with a purity of 99.8 percent by weight and a recovery of 99.65 percent was obtained through an extractive distillation process.

본 연구에서는 용매로써 sulfolane을 사용하고 2기의 증류탑을 이용하여 톨루엔이 과량 함유된 비 방향족 혼합물로부터 고 순도의 톨루엔을 생산해 내는 추출증류공정에 대한 전산모사 작업을 수행하였다. Sulfolane 용매를 이용한 추출증류공정의 모사를 위한 열역학 모델식으로는 NRTL 액체 활동도계수 모델식을 사용하였으며 범용성 화학공정 모사기인 Aspen Plus 12.1을 사용하였다. 모사 결과 최종제품으로 얻어진 톨루엔의 순도는 99.8 wt%였으며, 원료에 대한 회수율은 99.65%로 나타남을 알 수 있었다.

Keywords

References

  1. http://www.hyundaicorp.co.kr/global/prd_main.asp?sOffice_id=14
  2. http://www.gtchouston.com/articles/operational%20Experience% 20with%20gt-btx.pdf
  3. http://www.etis.net/balpyo/work19/23.pdf
  4. http://www.uop.com/objects/55%20Sulfolane.pdf
  5. Sungjin, L. and Hwayong, K., 'Liquid-liquid Equilibria for the Ternary Systems Sulfolane+Octane+Toluene, and Sulfolane+Octane +p-xylene at Elevated Temperatures,' J. Chem. Eng. Data, 43, 358-361(1998) https://doi.org/10.1021/je9702246
  6. Renon, H. and Prausnitz, J. M., 'Local Composition in Thermodynamic Excess Functions for Liquid Mixtures,' AIChE J., 14, 135-144 (1968) https://doi.org/10.1002/aic.690140124
  7. Larsen, B. L., Rasmussen, P. and Fredenslund. Aa., 'A Modified UNIFAC Group Contribution Model for Prediction of Phase Equilibria and Heats of Mixing,' Ind. Eng. Chem. Res., 26, 2274-2286(1987) https://doi.org/10.1021/ie00071a018
  8. Russel, R. A., 'A Flexible and Reliable Method Solves Singtower and Crude-distillation-column Problems,' Chem. Eng., 90, 53-59 (1983)
  9. http://www.gtchouston.com/articles/Aromatics%20Design%20- %20The%20Future%20is%20Now.pdf
  10. Gerald, L. K., Refinery Process Modeling: A Practical Guide to Steady State Modeling of Petroleum Processes, 1st ed., Kaes Enterprises, Inc.(2000)