Exergetic and Economic Assessment of Distillation Hybrid Configurations for Bioethanol Refining
Thermo-economics analysis was used to identify the most economic distillation hybrid configuration to dehydrate bioethanol mash (12 wt%) to fuel grade (99.5 wt%) based on economic objective of minimization of operating cost in this work. Three different hybrids of THIDC with azeotropic and, extractive distillation units were assessed using similar feed and product specifications of 1200 kmol/h (12 % by weight ethanol) and 55 kmol/h (99.5 % by weight ethanol) respectively . The six hybrid configurations were simulated using Aspen Plus ®. The hybrid of THIDC with conventional extractive distillation (THEX1) was shown to have the lowest irreversibility rate (lost work) and highest exergetic efficiency followed by the hybrid containing thermally extractive sequence (THEX3). The latter also has the lowest energy consumption. However, economic evaluation showed that thermally coupled extractive distillation hybrid (with THIDC) is the most attractive hybrid configuration dehydrating bioethanol to fuel grade at commercial scale with the highest return on investment (ROI) and the least annual product cost. This indicates its economic attractiveness when compared with the other hybrids considered in this work. The trade-off existing between economic and exergy efficiency favours the selection of THEX3 as the preferred choice for bioethanol refining among all the six hybrids investigated.
___
- Bastidas, P.A., Gil, I.D. and Rodriguez, G. (2010). Comparison of the Main Ethanol Dehydration Technologies through Process Simulations. In 20th European Symposium on Computer Aided Process Engineering–ESCAPE-20, Ischia, Italy.
- Vascncelos, C.J.G., Wolf-Maciel, M.R. (2002). Optimization, Dynamics and Control of a Complete Azeotropic Distillation: New Strategies and stability Consideration. Distillation and Absorption Conference, Baden-Baden 6-28, 2002
- Watanabe, D., Wu, H., Noguchi, C., Zhou, Y., Akao, T., and Shionoi, H. (2010). Enhancement of the initial rate of ethanol fermentation due to dysfunction of yeast stress response components Msn2p and/orMsn4p. J. Applied and Environmental microbiology, 77, 934-941. Jeong, J., Jeon, H., Ko, K., Chung, B., and Choi, G. (2012). Production of Anhydrous Ethanol Using Various Pressure Swing Adsorption Processes in Pilot Plant. Renewable Energy J., 42, 41-45.
- Demirel, Y. (2004). Thermodynamics Analysis of Separation Systems. J. Separation Science and Technology, 39, 3897-3942.
- Bremers, G., Birzietis, G., Blija, A., Skele, A., Rucins, A. and Danilevics, A. (2010). Evaluating Usability of Water Adsorption and Rectification in Dehydration of Bioethanol. Jelgava 2010: Proceedings of 9 th International Scientific Conference of Engineering for Rural development, 154-157.
- Gil, I.D., Uyazan, A.M., Aguilar, J.L., Rodriguez, G., and Caicedo, L.A. Simulation of Ethanol Extractive Distillation with a Glycols Mixture as Entrainer. In 2nd Mercosur Congress on Chemical Engineering & 4th Mercosur Congress on Process Systems Engineering, Braga, Portugal, September 4-6, 200 Sanchez, O.J., Moncada, J.A., and Cardona, C.A. (2006). Modeling and Simulation of Ethanol Dehydration by Pervaporation and Energy Analysis of Separation Schemas for Fuel Ethanol Production. In Int. Congress of Chemical and Process Engineering
- Torres-Ortega, C.E., Segovia-Hernandez,J.G., Harnandez, S., Hernandez, H., Bonilla-Petriciolet A.B. and Maya-Yescas, R. Design and Optimization of Thermally Coupled Distillation Sequences for Purification of Bio-ethanol. PSE2009: In 10 th
- ISSN: 1301-9724
- Yayın Aralığı: Yılda 4 Sayı
- Başlangıç: 1998
- Yayıncı: -