Energy and Economic Optimization of Distillation Sequencing

Document Type: Research Article

Authors

1 Shahid Hasheminejad Gas Refinery (Khangiran), Sarakhs, Iran

2 Research Institute of Petroleum Industry (RIPI), Tehran, Iran

Abstract

Effective parameters that can effect on the performance of the separation system consist of operating pressure, operating temperature, reflux ratio, and kind of produce desirable products and different sequences of splits. As take a separation system with optimal performance is dependent on optimization of above mentioned effective parameters. In generally, there are two criteria (as object function) for estimating of the performance of the separation systems. These criteria included of measure of energy consumption and design costs (i.e. capital cost, energy cost and total annual cost). From energy saving outlook our purpose is the design of one separation system that operates at minimum rate of energy consumption. Likewise from money saving outlook our purpose to carry out of the design of one separation system that its design costs becomes minimum. In this paper, concentrate more on optimization of distillation sequencing problem with energy consumption and design costs for a multi-component mixture. Hence we studied the various alternative options to separate a multicomponent feed stream consist of C3, i-C4, n-C4, i-C5, n-C5, C6 and C7.Afer that all of options are compared with each other and ranked based on minimum (or optimum) energy consumption (heating/cooling duties) and design costs. Finally with regard to the effects of operating conditions like operating pressure, temperature and reflux ratio, the optimum separating method has been suggested for this case study.

Keywords


Caballero, J.A. (2009). Thermally-coupled Distillation, Computer Aided Chemical Engineering, 27, 59–64.

Caballero, J. A. and Grossmann, I. E. (2015). Optimal synthesis of thermally coupled distillation sequences using a novel MILP approach, Computers & Chemical Engineering, 61, 118–135.

Coker, A. K. (2015). Ludwig's Applied Process Design for Chemical and Petrochemical Plants. New York: Gulf Professional Publishing.

Cortez-Gonzalez, J. and Segovia-Hernández, J. G., Hernández, S., Gutiérrez-Antonio, C., Briones-Ramírez, A., Rong B. G. (2014). Chemical Engineering Research and Design, 90, 1425-1447.

Emtir, M. M. K. (2002). Economic and controllability Analysis of Energy-Integrated Distillation. Schemes. Department of chemical Engineering, Budapest University of Technology and Economics.

Errico, M., Pirellas, P., Rong, B.-G., Ortega, C. E. T. and Segovia-Hernandez, J. G. (2014). A combined method for the design and optimization of intensified distillation systems, Chemical Engineering and Processing: Process Intensification, 85, 69–76.

Errico, M., Pirellas, P., Rong, B.-G., Ortega, C. E. T. and Segovia-Hernandez, J. G. (2014). The importance of the sequential synthesis methodology in the optimal distillation sequences design, Computers & Chemical Engineering, 62, 1–9.

Hasanzadeh Lashkajani K., Ghorbani B., Salehi G. R. and Amidpour M. (2013). The Design and Optimization of Distillation Column with Heat and Power Integrated Systems, Gas Processing Journal, 1, 51-68.

Jain, S., Smith, R. and Kim, J.K. (2012). Synthesis of heat-integrated distillation sequence systems, Journal of the Taiwan Institute of Chemical Engineers, 43(4), 525–534.     

Jana, K. (2010). Heat integrated distillation operation, Applied Energy, 87(5), 1477–1494.

Jin Jang, D. and Han Kim, Y. (2015). A new horizontal distillation for energy saving with a diabatic rectangular column, Korean Journal of Chemical Engineering , 32, 2181-2186. 

King, C.J. (2013). Separation Processes, 2nd Edition, New York: Dover Publications.

Setty, Y. P. (2005).Optimization of Distillation Sequences, Journal of Institution of Engineers, 85, 69-75.

Nakaiwa, M. Huang, K. Endo, T. Ohmori, T. Akiya T. and Takamatsu, T. (2003). Internally Heat- Integrated Distillation Columns: A Review, Chemical Engineering Research and Design, 81(1), 162–177.

Smith, R. (2005). Chemical Process Design and Integration. New York: John Wiley & Sons Ltd.

Takase, H. and Hasebe, S. (2015). Optimal structure synthesis of internally heat integrated distillation column, Journal of Chemical Engineering of Japan, 48, 222-229.

Triantafyllou, C. and Smith, R. (1992). The Design and Optimization of Fully Thermally-coupled Distillation Columns,Trans IChemE,70A, 118-132.

Vargas, M. A. and Fieg, G. (2012). Simulation study of alternatives for the efficient start-up of dividing-wall distillation column sequences, Computer Aided Chemical Engineering, 31, 750–754.

Wakabayashi, T. and Hasebe, S. (2015). Higher energy saving with new heat integration arrangement in heat-integrated distillation column, AIChE Journal, 61, 3479–3488.