Investigation on energy-efficient extractive distillation for the recovery of ethyl acetate and 1, 4-dioxane from industrial effluent. (20th December 2021)

• Record Type: Journal Article
• Authors: Li, Yudong; Sun, Tianyi; Ye, Qing; Xu, Yinggui; Jian, Xue; Li, Jinlong
• Is Part Of: Journal of cleaner production. Volume 329(2021)
• Publication Date: 2021-12-20
• Subjects: Energy-efficient extractive distillation -- Intensified processes -- Energy saving -- Economic benefits; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2021.129759
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Conventional extractive distillation processes have been proposed to separate the ternary ethyl acetate-1, 4-dioxane-water system with azeotropes. Energy-efficient extractive thermally coupled processes with heat integration have been developed to reduce energy consumption. A macro-analysis of the energy, exergy, economy, and environment is conducted to estimate the economic and environmental benefits. The results proved that an extractive dividing-wall column with a heat-integrated process possessed the greatest energy-saving potential, delivered best economic performance and exhibited highest exergy efficiency. Compared to those of a conventional direct extractive distillation process, the total energy requirement and total annual investment cost are reduced by 28.18% and 24.28%, respectively, by the best energy-saving process. The total exergy efficiency of it is 1.779%. The proposed cleaner and sustainable extractive dividing-wall column configuration could achieve energy saving, investment reduction, and effectively enhance the exergy efficiency. Highlights: The extractive distillation is used for ethyl acetate-1, 4-dioxane-water separation. The solvent is screened using the COSMO-SAC model. Five processes are comprehensively evaluated from energy, economy and environment. The thermally coupled configuration exhibited best benefits.