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Clean Technologies and Environmental Policy

, Volume 20, Issue 2, pp 259–269 | Cite as

Optimization of IGCC gasification unit based on the novel simplified equilibrium model

  • Maojian Wang
  • Guilian Liu
  • Chi Wai Hui
Original Paper

Abstract

The increasing pollutant emissions due to the development of science and technology creates tough challenges for the whole world. As one of the main causes, the utilization of solid fuels, like coal and biomass, has attracted the attentions of researchers. To alleviate this pollution, gasification technology is widely promoted in many fields of modern industry, especially in its application for Integrated Gasification Combined Cycle (IGCC) plant. Improving the simulation of gasifier is one of the most effective and essential ways to mature gasification technology. In this paper, a novel simplified equilibrium model is proposed for IGCC gasification unit. Through the analysis of gasification mechanism, Water Gas Shift Reaction (WGSR) is verified as the control step to determine the compositions of syngas. The simplified model based on the equilibrium of WGSR is proposed, developed and validated with experimental data. Furthermore, the sensitivity analysis is completed to demonstrate the influences of key factors on syngas compositions, such as reaction temperature, oxygen feed ratio and water feed ratio. Finally, the IGCC gasification unit operation conditions are optimized and the Cold Gas Efficiency is improved approximately 10% after optimization.

Keywords

Integrated Gasification Combined Cycle Gasification Equilibrium model Water Gas Shift Reaction 

Notes

Acknowledgements

Financial supports provided by the National Natural Science Foundation of China (U1662126) and (21476180) are gratefully acknowledged. RGC-GRF Grant No. 16211117 is gratefully acknowledged as well.

References

  1. Ancheyta J (2013) Modeling of processes and reactors for upgrading of heavy petroleum. CRC Press, Boca RatonCrossRefGoogle Scholar
  2. Bacon D, Downie J, Hsu J, Peters J (1985) Modelling of fluidized bed wood gasifiers. In Fundamentals of thermochemical biomass conversion. Springer, pp 717–732Google Scholar
  3. Calkins WH (1994) The chemical forms of sulfur in coal—a review. Fuel 73:475–484. doi: 10.1016/0016-2361(94)90028-0 CrossRefGoogle Scholar
  4. De Souza-Santos ML (2010) Solid fuels combustion and gasification: modeling, simulation. CRC Press, Boca RatonCrossRefGoogle Scholar
  5. Emun F, Gadalla M, Majozi T, Boer D (2010) Integrated gasification combined cycle (IGCC) process simulation and optimization. Comput Chem Eng 34:331–338. doi: 10.1016/j.compchemeng.2009.04.007 CrossRefGoogle Scholar
  6. Goyal A, Bryan B, Rehmat A, Patel J, Ghate M (1990) In-situ desulfurization in a fluidized-bed coal gasifier. Energy Sources 12:161–179. doi: 10.1080/00908319008960197 CrossRefGoogle Scholar
  7. Huang D, Zhang HS, Weng SL, Su M (2016) Modeling and simulation of IGCC considering pressure and flow distribution of gasifier. Appl Sci Basel 6:292. doi: 10.3390/App6100292 CrossRefGoogle Scholar
  8. Hucknall D (1985) Pyrolytic reactions of hydrocarbons. Chemistry of hydrocarbon combustion. Springer, Dordrecht, pp 327–377CrossRefGoogle Scholar
  9. Jarungthammachote S, Dutta A (2008) Equilibrium modeling of gasification: Gibbs free energy minimization approach and its application to spouted bed and spout-fluid bed gasifiers. Energy Convers Manag 49:1345–1356. doi: 10.1016/j.enconman.2008.01.006 CrossRefGoogle Scholar
  10. Kasule JS, Turton R, Bhattacharyya D, Zitney SE (2014) One-dimensional dynamic modeling of a single-stage downward-firing entrained-flow coal gasifier. Energy Fuel 28:4949–4957. doi: 10.1021/ef5010122 CrossRefGoogle Scholar
  11. Kawabata JI et al (1981) Performance of a pressurized two-stage fluidized gasification process for production of low-btu gas from coal char. Chem Eng Commun 11:335–345. doi: 10.1080/00986448108911003 CrossRefGoogle Scholar
  12. Keche AJ, Gaddale APR, Tated RG (2015) Simulation of biomass gasification in downdraft gasifier for different biomass fuels using ASPEN PLUS. Clean Technol Environ 17:465–473. doi: 10.1007/s10098-014-0804-x CrossRefGoogle Scholar
  13. Klemes JJ, Varbanov PS (2013) Process intensification and integration: an assessment. Clean Technol Environ 15:417–422. doi: 10.1007/s10098-013-0641-3 CrossRefGoogle Scholar
  14. Kong XD, Zhong WM, Du WL, Qian F (2013) Three stage equilibrium model for coal gasification in entrained flow gasifiers based on aspen plus. Chin J Chem Eng 21:79–84. doi: 10.1016/S1004-9541(13)60444-9 CrossRefGoogle Scholar
  15. Lemmon E, McLinden M, Friend D (2005) Thermophysical properties of fluid systems. http://webbook.nist.gov/chemistry/
  16. Li X, Grace JR, Watkinson AP, Lim CJ, Ergudenler A (2001) Equilibrium modeling of gasification: a free energy minimization approach and its application to a circulating fluidized bed coal gasifier. Fuel 80:195–207. doi: 10.1016/S0016-2361(00)00074-0 CrossRefGoogle Scholar
  17. Macak J, Malecha J (1978) Mathematical model for the gasification of coal under pressure. Ind Eng Chem Process Des Dev 17:92–98. doi: 10.1021/i260065a017 CrossRefGoogle Scholar
  18. Marion C, Muenger J (1981) Partial oxidation syngas can help improve refining economics. Energy Program 1:27–32Google Scholar
  19. Maurstad O (2005) An overview of coal based integrated gasification combined cycle (IGCC) technology. http://sequestration.mit.edu/pdf/LFEE_2005-002_WP.pdf
  20. Rhodes C, Hutchings GJ, Ward AM (1995) Water-gas shift reaction-finding the mechanistic boundary. Catal Today 23:43–58. doi: 10.1016/0920-5861(94)00135-O CrossRefGoogle Scholar
  21. Robinson PR (2006) Petroleum processing overview. Springer, New York, pp 1–78Google Scholar
  22. Sahraei MH, McCalden D, Hughes R, Ricardez-Sandoval LA (2014) A survey on current advanced IGCC power plant technologies, sensors and control systems. Fuel 137:245–259. doi: 10.1016/j.fuel.2014.07.086 CrossRefGoogle Scholar
  23. Salam PA, Bhattacharya SC (2006) A comparative study of charcoal gasification in two types of spouted bed reactors. Energy 31:228–243. doi: 10.1016/j.energy.2005.01.004 CrossRefGoogle Scholar
  24. Sanchez C, Arenas E, Chejne F, Londono CA, Cisneros S, Quintana JC (2016) A new model for coal gasification on pressurized bubbling fluidized bed gasifiers. Energy Convers Manag 126:717–723. doi: 10.1016/j.enconman.2016.08.066 CrossRefGoogle Scholar
  25. Schuster G, Löffler G, Weigl K, Hofbauer H (2001) Biomass steam gasification—an extensive parametric modeling study. Bio Technol 77:71–79. doi: 10.1016/S0960-8524(00)00115-2 CrossRefGoogle Scholar
  26. Seider WD, White CW (1985) Chemical reaction equilibrium analysis: theory and algorithms. AIChE J 31:204–213. doi: 10.1002/aic.690310127 CrossRefGoogle Scholar
  27. Sergeant GD, Smith IW (1973) Combustion rate of bituminous coal char in the temperature range 800–1700 K. Fuel 52:52–57. doi: 10.1016/0016-2361(73)90012-4 CrossRefGoogle Scholar
  28. Smith RJB, Loganathan M, Shantha MS (2010) A review of the water gas shift reaction kinetics. Int J Chem React Eng 8:4. doi: 10.2202/1542-6580.2238 Google Scholar
  29. Smoot LD, Smith PJ (2013) Coal combustion and gasification. Springer, New YorkGoogle Scholar
  30. Speight JG (2014) The chemistry and technology of petroleum. CRC Press, Boca RatonGoogle Scholar
  31. Twigg MV (1989) Catalyst handbook. CSIRO, ClaytonGoogle Scholar
  32. Varbanov PS, Seferlis P (2014) Process innovation through Integration approaches at multiple scales: a perspective. Clean Technol Environ 16:1229–1234. doi: 10.1007/s10098-014-0837-1 CrossRefGoogle Scholar
  33. Vilienskii T, Hezmalian D (1978) Dynamics of the combustion of pulverized fuel. Energia (Moscow) 11:246–251Google Scholar
  34. Wood AJ, Wollenberg BF (2012) Power generation, operation, and control. Wiley, New YorkGoogle Scholar
  35. Zhang H, Huang D, Zhou D, Weng S, Lu Z (2013) The dynamic modeling and simulation on a shell gasifier. In: ASME 2013 international mechanical engineering congress and exposition. American Society of Mechanical Engineers, San Diego, USAGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Xi’an Jiao Tong UniversityXi’anChina
  2. 2.Hong Kong University of Science and TechnologyKowloonHong Kong

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