Efficient Use of Energy through Incorporation of a Gas Turbine in Methanol Plant

A techno-economic evaluation for efficient use of
energy in a large scale industrial plant of methanol is carried out.
This assessment is based on integration of a gas turbine with an
existing plant of methanol in which the outlet gas products of
exothermic reactor is expanded to power generation. Also, it is
decided that methanol production rate is constant through addition of
power generation system to the existing methanol plant. Having
incorporated a gas turbine with the existing plant, the economic
results showed total investment of MUSD 16.9, energy saving of 3.6
MUSD/yr with payback period of approximately 4.7 years.

• M. Azadi
• N. Tahouni
• M. H. Panjeshahi

• Energy saving
• Gas turbine
• Methanol
• Power generation.

[1] Narvaez, D. Chadwick, L. Kershenbaum, "Small-medium scale
polygeneration systems: Methanol and power Production” Applied
Energy, 2014. 113: p. 1109–1117.
[2] M. Soltanieh, K.M. Azar, and M. Saber, "Development of a zero
emission integrated system for co-production of electricity and methanol
through renewable hydrogen and CO2 capture”International Journal of
Greenhouse Gas Control, 2012. 7(0): p. 145-152.
[3] A.K. Kralj,"Electricity cogeneration in an exothermic reactor circuit
system using an open gas turbine” Fuel, 2014. 118(0): p. 220-226.
[4] M. Sahafzadeh, A. Ataei, N. Tahouni, M.H. Panjeshahi, "Integration of a
gas turbine with an ammonia process for improving energy efficiency”
Appl. Therm. Eng. 58 (2013) 594-604.
[5] H. Axelsson, S. Harvey, A. Asblad, T. Berntsson, "Potential for
greenhouse gas reduction in industry through increased heat recovery
and/or integration of combined heat and power” Appl. Therm. Eng. 23
(2003) 65–87.
[6] B. Kalitventzeff, F. Mare´chal, H. Closon, "Better solutions for process
sustainability through better insight in process energy integration” Appl.
Therm. Eng. 21 (2001) 1349–1368.
[7] F.J.J.G Janssen, A.H.M. Verkooijen, P.J. Ploumen, "Synthesis of
ethane” European Patent 0753652, assigned to N.V. Kema, The
Netherlands, 1997.
[8] M.A. Agee, L.J. Weick, K.L. Agee, E.L. Trepper, "Synthesis gas
production system and method”US Patent 6155039, assigned to
Syntroleum Corp (US), 2000.
[9] J. Perold, I.L. Greeff, K.J. Ptasinski, F.J.J.G Janssen, "Using a turbine
expander to recover exothermic reaction heat a case study on a phthalic
anhydride process” S. Afr. J. Chem. 13(2001) 1–14.
[10] I.L. Greeff, J.A. Visser, K.J. Ptasinski, F.J.J.G Janssen, "Utilization of
reactor heat in methanol synthesis to reduce compressor duty application
of power cycle principles and simulation tools” Appl. Therm. Eng. 22
(2002)1549–1458.
[11] I.L. Greeff, J.A. Visser, K.J. Ptasinski, F.J.J.G. Janssen, ”Integration of a
turbine expander with an exothermic reactor loopdflow sheet
development and application to ammonia production” Energy. 28 (2003)
1495-1509.
[12] A. K. Kralj , P. Glavic, "Multi-criteria optimization in a methanol
process” Appl. Therm. Eng. 29 (2009) 1043–1049.
[13] H.P. Loh, J. Lyons, I. Charles, W. White, "Process Equipment Cost
Estimation” Final report, U.S. Department of Energy, National Energy
Technology Laboratory, 2002. DOE/NETL-2002/1169.
[14] BahadorBakhtiari, Serge Bedard, "Retrofitting heat exchanger networks
using a modified network pinch approach”Applied Thermal
Engineering, Volume 51, Issues 1–2, March 2013, Pages 973-979.
[15] Kheen Nam Sun, SharifahRafidah Wan Alwi, Zainuddin Abdul Manan,
"Heat exchanger network cost optimization considering multiple utilities
and different types of heat exchangers” Computers & Chemical
Engineering, Volume 49, 11 February 2013, Pages 194-204.