Studi Kinerja Distilasi Packed Kolom dan Adsorpsi Silika Gel dalam Pemisahan Etanol–Air
DOI:
https://doi.org/10.55732/fxsmqz34Keywords:
Ethanol, Distillation, Silica Gel Adsorption, MolassesAbstract
Pemurnian etanol dari campuran alkohol dan air merupakan tahapan penting dalam produksi bioetanol, terutama untuk meningkatkan kualitas produk akhir. Penelitian ini bertujuan untuk mengevaluasi kinerja pemisahan etanol melalui kombinasi proses distilasi menggunakan kolom berkemasan dan adsorpsi menggunakan silika gel. Variasi rasio refluks distilasi sebesar 1,36; 2,86; dan 3,00 mL/min serta temperatur adsorpsi 80°C, 90°C, 100°C, dan 110°C digunakan untuk menentukan kondisi operasi optimum. Hasil penelitian menunjukkan bahwa peningkatan rasio refluks meningkatkan konsentrasi etanol hasil distilasi, dengan nilai tertinggi diperoleh pada rasio refluks 3,00 mL/min. Pada tahap adsorpsi, temperatur 80°C menghasilkan konsentrasi etanol tertinggi dan persentase penyerapan air terbesar. Selain itu, penggunaan pelarut octanol memberikan kinerja pemisahan yang lebih baik dibandingkan dodecanol.
Purification of ethanol from alcohol–water mixtures is an essential step in bioethanol production to improve the quality of the final product. This study aims to evaluate the performance of ethanol separation using a combination of packed column distillation and adsorption with silica gel. Variations in distillation reflux ratios of 1.36, 2.86, and 3.00 mL/min, as well as adsorption temperatures of 80°C, 90°C, 100°C, and 110°C, were applied to determine the optimum operating conditions. The results indicate that increasing the reflux ratio enhances the ethanol concentration in the distillate, with the highest value obtained at a reflux ratio of 3.00 mL/min. In the adsorption stage, an operating temperature of 80°C produced the highest ethanol concentration and the greatest water adsorption efficiency. In addition, the use of octanol as a solvent resulted in better separation performance compared to dodecanol.
References
Blanchard, L. A., Gu, Z., & Brennecke, J. F. (2001). High-pressure phase behavior of IL/CO2 systems. J. Phys. Chem. B., 105, 2437.
Cui, P., Yu, M., Liu, Z., Zhu, Z., & Yang, S. (2019). Energy, exergy, and economic (3E) analyses and multi-objective optimization of a cascade absorption refrigeration system for low-grade waste heat recovery. Energy Convers. Manage., 184, 249.
Dhaniswara, T. K., Widjaja, T., Kimia, T., & Kimia, T. (2016). Pengaruh Porositas Packing Steel Wool Terhadap Pressure Drop Didalam Packed Bed Column Pada Distilasi Campuran Etanol-Amil-Alkohol-Air. 2(1).
Dyartanti, E. R., Kusumastuti, D., Aufar, I. M., & Kimia, J. (n.d.). Etanol Fuel Grade Dengan Metode Adsorpsi Dalam Kolom Unggun Tetap Menggunakan Adsorben Cao-Zeolit Granular. 11(1), 31–34.
Kleizen, H. H. (2006). Conceptual chemical process design in a sustainable technological world. J. Cleaner Prod., 14, 924.
Lei, Z., Dai, C., Zhu, J., & Chen, B. (2014). Extractive distillation with ionic liquids: A review. AIChE J., 60, 3312.
Li, H., Sun, G. L., Li, D. Y., Xi, L., & Zhou, P. (2021). Molecular interaction mechanism in the separation of a binary azeotropic system by extractive distillation with IL. Green. Energy Environ., 6, 329.
Li, R., Cui, X., Wu, T., Feng, T., & Zhang, Y. (2013). Selection of IL solvent for liquid-liquid extraction based on COSMO-SAC model. J. Chem. Thermodyn., 64, 452.
Mahajan, Y. S., & Jadhav, H. R. (n.d.). Use of membrane distillation for selective recovery of chemicals like ethyl alcohol: a critical review. Chemical Product and Process Modeling. https://doi.org/doi:10.1515/cppm-2025-0023
Mullins, E., Oldland, R., Liu, Y. A., Wang, S., Sandler, S. I., Chen, C. C., Zwolak, M., & Seavey, K. C. (2006). Sigma-profile database for using COSMO-based thermodynamic methods. Ind. Eng. Chem. Res., 45, 4389.
Schahl, A., Reat, V., & Jolibois, F. (2020). Structures and NMR spectra of short amylose-lipid complexes. Insight using molecular dynamics and DFT quantum chemical calcula-tions. Carbohydr. Polym., 235, 115846.
Shen, Y., Chen, Z., Qi, H., Ma, Z., Dai, Y., Zhao, Q., Zhu, Z., Ma, Y., & Wang, Y. (2021). Mechanism analysis of extractive distillation for separation of acetic acid and water based on quantum chemical calculation and molecular dynamics simulation. J. Mol. Liq., 332, 115866.
Yang, H. L. (2004). Recovery and using of ethanol-cyclohexane waste liquid during the experiment. Chem. Eng., 3, 53.
Zhu, Z., Ri, Y., Jia, H., Li, X., Wang, Y., & Wang, Y. (2017). Process evaluation on the separation of ethyl acetate and ethanol using extractive distillation with ionic liquid. Sep. Purif. Technol., 181, 44.
Downloads
Published
Issue
Section
License
Copyright (c) 2025 Nusantara Technology and Engineering Review
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
