Optimization of Distillation Process for Recovery of High-Purity Methanol from Spent Catalysts of Petrochemical Process 


Vol. 31,  No. 3, pp. 216-223, Sep.  2025
10.7464/ksct.2025.31.3.216


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  Abstract

In this study, distillation was simulated to recover 2.59 kg/h of high-purity methanol remaining on the spent catalysts discharged from the petrochemical process. The optimal operating conditions were determined by varying key parameters such as the theoretical number of stages, the feed stage of raw material, the reflux ratio, and the distillate to feed ratio (D․F). The column theoretical plate number should be designed in 70 stages to satisfy the target methanol purity and flow rate. As a result, a total of 72 stages were designed taking into consideration the condenser and the reboiler to be installed at the upper and lower parts of the system. The optimal feed stage for the raw material was found to be between the 8th and 63rd stages, where the reboiler heat duty was 27,223 kcal/h. The effects of the reflux ratio on the methanol purity and recovery flow rate were also analyzed. As the reflux ratio increased, the methanol purity improved and the recovery flow rate remained relatively constant. In this study, the reflux ratio was fixed at 40.5 in order to consider the internal diameter of the column and secure the methanol purity and flow rate. A D․F of 0.72 was selected to achieve the target flow rate of 2.59 kg/h.

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  Cite this article

[IEEE Style]

C. Jeong, Y. E. Kim, Y. Lee, H. Park, S. Kang, M. S. Lee, "Optimization of Distillation Process for Recovery of High-Purity Methanol from Spent Catalysts of Petrochemical Process," Clean Technology, vol. 31, no. 3, pp. 216-223, 2025. DOI: 10.7464/ksct.2025.31.3.216.

[ACM Style]

Chang-Hoon Jeong, Ye Eun Kim, Yong-Hee Lee, Hayoon Park, Sung-Jin Kang, and Man Sig Lee. 2025. Optimization of Distillation Process for Recovery of High-Purity Methanol from Spent Catalysts of Petrochemical Process. Clean Technology, 31, 3, (2025), 216-223. DOI: 10.7464/ksct.2025.31.3.216.

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pISSN : 1598 - 9712
eISSN : 2288 - 0690

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