Hydrogen Integration in Refinery Using MINLP Method

Abstract:

Hydrogen is an important utility in the production of clean fuels as low-sulfur gasoline and diesel. The combination of low-sulfur fuel specifications and reduced production of hydrogen in catalytic reformers make hydrogen management a critical issue. In this paper a systematic approach for the retrofit design of hydrogen networks in refineries was proposed. The methodology is based upon mathematical optimization of a superstructure and maximizing the amount of hydrogen recovered across a site. The techniques account fully for pressure constraints as well as the existing equipment. The optimum placement of new equipment such as compressors and purification units is also considered. Total annual cost and fresh hydrogen required by the refinery are employed as the optimizing objects. Equations obtained from superstructure method are solved with mixed-integer nonlinear programming of the general algebraic modeling system. In this work the Tehran refinery was considered as a case study. The results of optimization show that the 28% reduction was achieved in hydrogen production of north section and this is 35.7% for south section of refinery. Also adding the new hydrogen recovery unit in hydrogen network will cause 20% reduction in total costs of north and 31.2% in south sections.

• Periodical: Advanced Materials Research (Volumes 622-623)
• Pages: 720-725
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.622-623.720
• Online since: December 2012
• Authors: Mir Esmaeil Masoumi, Zahra Firooz Jahantighy
• Keywords: GAMS, Hydrogen Management, MINLP, Optimization, Superstructure

References

[1] M.I. Ahmad, M. Jobson and N. Zhang, Multi-period hydrogen management. J. chem. Eng. Transac. Vol. 18 (2009), pp.743-748.

[2] G.P. Towler, R. Mann,A. Serriere, J. and C.M.D. Gabaude, C. M. D. Refinery hydrogen management: Cost analysis of chemically Integrated facilities. J. Ind. Eng. Chem. Res. Vol. 35 (1996), pp.2378-88.

DOI: 10.1021/ie950359+

[3] J.J. Alves, and G.P. Towler, Analysis of refinery hydrogen distribution systems. J. Industrial & Engineering Chemistry Research. Vol. 41(23) (2002), p.5759–69.

DOI: 10.1021/ie010558v

[4] M. El-Halwagi, F. Gabriel and D. Harell, Rigorous graphical targeting for resource conservation via material recycle/reuse networks. J. Industrial & Engineering Chemistry Research Vol. 42(19) (2003), p.4319–28.

DOI: 10.1021/ie030318a

[5] N. Hallale and F. Liu, Refinery hydrogen management for clean fuels production. J. Advances in Environmental Research Vol. 6 (2001), pp.81-98.

DOI: 10.1016/s1093-0191(01)00112-5

[6] A. Fonseca, V. Sa, H. Bento, M. Tavares, M.G. Pinto and L. Gomes. Hydrogen distribution network optimization: a refinery case study. J. Cleaner production Vol. 16 (2008), pp.1755-63.

DOI: 10.1016/j.jclepro.2007.11.003

[7] M. Khajehpour, F. Farhadi and M.R. Pishvaie, Reduced superstructure solution of MINLP problem in refinery hydrogen management. International Journal of Hydrogen Energy, Vol. 34(22) (2009), pp.9233-9238.

DOI: 10.1016/j.ijhydene.2009.08.086

[8] S. Peramanu, B.G. Cox and B.B. Pruden, Economics of hydrogen recovery processes for the purification of hydroprocessor purge and off gases. International Journal of Hydrogen Energy Vol. 24(5) (1999), p.405–24.

DOI: 10.1016/s0360-3199(98)00105-0

[9] F. Liu and N. Zhang, Strategy of purifier selection and integration in hydrogen networks. J. Chemical Engineering Research & Design Vol 82(A10) (2004), p.1315–30.

DOI: 10.1205/cerd.82.10.1315.46739

[10] L. Zuwei, W. Jingdai, Y. Yongrong and R. Gang, Integrating purifiers in refinery hydrogen networks: a retrofit case study. Journal of Cleaner Production Vol(18) (2010), pp.233-241.

DOI: 10.1016/j.jclepro.2009.10.011

[11] I. Alhajri, Integration of Hydrogen and CO2 Management within Refinery Planning, PhD Thesis, University of Waterluoo. (2008).