Dhoni Hartanto, Prima Astuti Handayani, Widi Astuti, Ratna Dewi Kusumaningtyas, Yulian Candra Purwana, Maftukhaturrizqiyah, Reni Titis Wijayanti, Durroti Zuhriah Wulansari, Ria Wulansarie, Irene Nindita Pradnya, Danang Subarkah Hadikawuryan, Agung Ari Wibowo, Riza Mazidu Sholihin, Achmad Chafidz, Ianatul Khoiroh
Ethanol purification has become of great interest recently because ethanol can be used as renewable energy, solvent in many industries, and for medicinal purposes. The separation of ethanol from water is challenging because the azeotropic point has appeared in this binary mixture. Extractive distillation technology is one of the most interesting methods to separate ethanol from water due to the competitiveness of its energy consumption and capital investment costs. Ionic liquids such as 1-butyl-3-methylimidazolium bromide [BMIM] [Br], categorized as a green solvent, produce a significant salting-out effect in the ethanol-water system. This makes ionic liquid a promising solvent in ethanol-water separation. This study simulated the extractive distillation of an ethanol-water system with 1-butyl-3-methylimidazolium bromide as a solvent. The simulation and sensitivity analysis were performed on the Aspen Plus Process Simulator to obtain the optimum configuration. The NRTL thermodynamic model was used in this study. The effects of the number of stages (NS), binary feed stage (BFS), entrainer feed stage (EFS), and reflux ratio (RR) on the ethanol concentration with minimum energy requirements were studied. The most optimal configurations to produce a high ethanol concentration with less energy are NS 28, BFS 22, EFS 4, and RR 1.5. © 2023, Gadjah Mada University. All rights reserved.
Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Kampus Sekaran, Gunungpati, Semarang, 50229, Indonesia; Department of Chemical Engineering, Politeknik Negeri Malang, Jl. Soekarno-Hatta No. 9, 64415, Indonesia; RSUD Dr. Harjono, Pakunden, Ponorogo, 63419, Indonesia; Akafarma Sunan Giri Ponorogo, Jalan Batoro Katong, Ponorogo, 63411, Indonesia; Department of Chemical Engineering, Universitas Islam Indonesia, Yogyakarta, 55584, Indonesia; Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan; Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, Selangor Darul Ehsan, Semenyih, 43500, Malaysia
