Innovations
Vol. 14 (2026), Issue 1, pg(s) 24-28

INNOVATIVE SOLUTIONS

Optimization of natural gas reforming parameters in the midrex process to increase hydrogen yield and reduce fuel consumption

  • 1 Rudny industrial University, Rudny, Kazakhstan
  • 2 Karaganda Industrial University, Temirtau, Kazakhstan

Abstract

In this paper, a comprehensive analysis of the process of natural gas reform in MIDREX technology was carried out, which was aimed at optimizing this process in order to increase hydrogen yield, reduce the specific consumption of natural gas and minimize the risks of soot formation. The paper also calculates the thermal balance, combined steam-carbon dioxide reforming (SMR + DRM). Based on the conducted studies, optimal reforming modes were determined: gas outlet temperature ~915-920°C; H2O/C ~1.8; increased CO2 fraction. Switching to an optimized reforming mode reduces natural gas consumption by 5.5%, increases H2 output by 6.4%, and reduces CO2 emissions due to better energy efficiency and H2 addition potential. The results obtained in this work are useful for upgrading existing Midrex installations in the direction of decarbonization, including the transition to MIDREX Flex/H2 technologies.

Keywords

References

  1. Midrex Technologies, Inc. 2024 World Direct Reduction Statistics. Charlotte, NC: Midrex Technologies, 2025.
  2. S. C. Montague. The MIDREX® Process – Bridging the Gap to Carbon-Free Ironmaking. Midrex Technical Papers, 2021.
  3. T. Harada, H. Tanaka. Kobe Steel’s Direct Reduction Technologies for the Future. Kobe Steel Engineering Reports. 2019, vol. 68, № 1, pp. 22-28.
  4. A. Chatterjee. Sponge Iron Production by Direct Reduction of Iron Oxide. PHI Learning Pvt. Ltd., 2nd Edition, 2012.
  5. V. Chevrier, L. Boisvert. DRI Technology: The Future of Green Steelmaking. AISTech 2020 Proceedings. 2020. pp. 45-56.
  6. J. Kopfle. Direct Reduction: The Preferred Route for Iron Making. Iron & Steel Technology. 2017, vol. 14, № 5, pp. 44-51.
  7. Metso Outotec. Direct Reduction Plant: Process Description and Operation Manual (General Overview). 2022.
  8. R.L. Hunter. Evolution of the Midrex Process. Direct from Midrex, 3rd Quarter, 2015.
  9. J.R. Rostrup-Nielsen. Catalytic Steam Reforming. Science and Technology. 1984, vol. 5, pp. 108-117.
  10. J.R. Rostrup-Nielsen, J. Sehested. Hydrogen and synthesis gas by steam and CO2 reforming. Advances in Catalysis. 2002, vol. 47, pp. 65-139.
  11. D.L. Trimm. Coke formation and minimisation during steam reforming reactions. Catalysis Today, 1999, vol. 49, № 1-3, pp. 3-10.
  12. J. Xu, G.F. Froment. Methane Steam Reforming, Methanation and Water-Gas Shift: I. Intrinsic Kinetics. AIChE Journal. 1989, vol. 35, № 1, pp. 88-96.
  13. M.C.J. Bradford, M.A. Vannice. CO2 Reforming of Methane. Catalysis Reviews. 1999, vol. 41, № 1, pp. 1-42.
  14. D. Pakhare, J. Spivey. A review of dry (CO2) reforming of methane over noble metal catalysts. Chemical Society Reviews. 2014, vol. 43, № 22, pp. 7813-7837.
  15. P.E. York, T. Xiao, M.L.H. Green. Brief Overview of the Partial Oxidation of Methane and Dry Reforming. Topics in Catalysis. 2003, vol. 22, pp. 345-358.
  16. C.H. Bartholomew. Mechanisms of catalyst deactivation. Applied Catalysis A: General. 2001, vol. 212, №. 1-2, pp. 17-60.
  17. J. Sehested. Four challenges for nickel steam-reforming catalysts. Catalysis Today. 2006, vol. 111, № 1-2, pp. 103-110.
  18. J.W. Snoeck, G.F. Froment, M. Fowles. Kinetic modeling of carbon filament formation during steam reforming of methane. Journal of Catalysis. 1997, vol. 169, № 1, pp. 242-249.
  19. A. Alstrup, J.R. Rostrup-Nielsen, S. Roen. Passivation of Nickel Catalysts by Sulfur. Journal of Catalysis. 1981, vol. 77, pp. 397-409.
  20. M.D. Argyle, C.H. Bartholomew. Heterogeneous Catalyst Deactivation and Regeneration: A Review. Journal of Catalysis. 2015, vol. 5, № 1, pp. 145-269.
  21. H.S. Bengaard, J.K. Norskov, J. Sehested, B.S. Clausen, L.P. Nielsen, A.M. Molenbroek, J.R. Rostrup-Nielsen. Steam reforming and graphite formation on Ni catalysts. Journal of Catalysis. 2002, vol. 209, pp. 365-384.
  22. M.R. Rahimpour, M. Jokar, A.M. Bahmanpour. Dynamic simulation and optimization of an industrial steam reformer. Chemical Engineering and Processing. 2012, vol. 55, pp. 1-11.
  23. S. Ebrahimi, J. Towfighi, R. Irandoust. Investigating the effects of operating parameters on the performance of Midrex reforming furnaces. International Journal of Hydrogen Energy. 2010, vol. 35, № 16, pp. 8504-8515.
  24. A. Shamsi, J.J. Spivey, J.B. Robinson. Carbon formation during dry reforming of methane over Ni-based catalysts. Fuel. 2005, vol. 84, № 12, pp. 1560-1569.
  25. L.F. Brown. Optimal control of a Midrex direct reduction plant. Control Engineering Practice. 2010, vol. 18, № 5, pp. 562-571.
  26. R. Farrauto. Fundamentals of Industrial Catalytic Processes. Wiley, 2nd Edition, 2006.
  27. E.T. Turkdogan. Physical Chemistry of High Temperature Technology. Academic Press, 1980.
  28. H. Hamedi, M. Sadeghi, M.A. Shariati. Exergy and exergoeconomic analysis of a Midrex based direct reduction plant. Energy Conversion and Management. 2018, vol. 158, pp. 244-256.
  29. S. Napporn. Decarbonization of the Iron and Steel Industry with Hydrogen. Energy. 2022, vol. 239, 122156.
  30. A. Anameric, S. Kawatra. Properties and features of direct reduced iron," Mineral Processing and Extractive Metallurgy Review. 2007, vol. 28, pp. 59-116.
  31. N. Sarkar. Carbon Footprint Reduction in DRI Plants. Steel Times International. 2019, vol. 42, № 3.
  32. Юсфин Ю.С., Гиммельфарб А.А. Теория и технология бескоксовой металлургии. - М.: Металлургия, 2008.
  33. Берковский Б.П., Франценюк И.В. Металлургия железа: Прямое восстановление. - Липецк: НЛМК, 2005.
  34. Тимофеева А.С. Анализ работы установок металлизации Midrex. Черная металлургия. Бюллетень научно-технической и экономической информации. 2018, №5.
  35. Котенев В.И. Технология производства железорудных металлизованных окатышей. - М.: Руда и Металлы, 2010.
  36. T. Nozaki, K. Okazaki. Non-thermal plasma catalysis of methane: SMR and DRM. Catalysis Today. 2013, vol. 211, pp. 29-38.
  37. K. Tomishige, M. Asadullah, K. Kunimori. Catalyst design for dry reforming of methane. Journal of the Japan Petroleum Institute. 2011, vol. 54, pp. 243-252.
  38. Z. Bian, S. Das, M. H. Wai, P. Hongmanorom, S. Kawi. A Review on Dry Reforming of Methane in Conventional and Microchannel Reactors. International Journal of Chemical Reactor Engineering. 2017, vol. 15, №.3.
  39. G. Jones. The thermodynamics of DRI production using natural gas. Metallurgical Transactions B. 1993, vol. 24, pp. 889-898.

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