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Modelling and Simulation of Gauze Reactor of Ammonia Oxidation

Received: 10 January 2016     Accepted: 20 January 2016     Published: 1 February 2016
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Abstract

Modelling of catalytic ammonia oxidation reactor for nitric oxide production in nitric acid plant over gauzes of Pt/Rh catalyst was the subject of current study. Viscosity, mass transfer and kinetic equations were used for the gas mixture feeding the reactor, partial pressure and mole fraction of ammonia was essential, also wire diameter was considered to detect platinum losses during oxidation operation. In order to investigate the performance of catalytic oxidation reactor, ordinary equation for determining of conversion yields of ammonia to nitric oxide was solved in mathematical model numerically. Variations of conversion with inlet mixture temperature, mixture concentration, inlet pressure and gauze temperature during cycle were investigated. Platinum losses rate as platinum oxide (PtO2) was studied with gauzes surface temperature by using numerical solution of the mathematical model. Modelling results were compared with an industrial reactor data. Comparing industrial data for all studied variables with those obtained by using mathematical model have shown the higher degree of accuracy of the model to predict the operating values with minimum deviation.

Published in American Journal of Chemical Engineering (Volume 4, Issue 1)
DOI 10.11648/j.ajche.20160401.13
Page(s) 16-22
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2016. Published by Science Publishing Group

Keywords

Nitric Acid, Kinetics of Ammonia Oxidation, Platinum Losses

References
[1] P. Uronen, E. Kiukaanniemi, “Optimization of the ammonia oxidation process used in the manufacture of nitric acid”, University of Oulu, Finland.
[2] Vlastimil FILA and Bohumil BERNAUER “A mathematical model of a gauze reactor for the ammonia oxidation”, Department of Inorganic Technology, Prague Institute of Chemical Technology, The Czech Republic 1993.
[3] HOWARD F. RASE, Chemical reactor design for process plants, Case studies and design data, University of Texas at Austin.
[4] Kirk/Othmer, “Encyclopedia of Chemical Technology” 3rd edition, John Wiley & Sons, New York, (1999-2014).
[5] E. J. Nowak, “Catalytic oxidation of ammonia”, Process Research Division, New Jersey, 1966.
[6] “UHDE Nitric acid plant manual”, EHC Company, Egypt, 2013.
[7] Daniel A. Hickman and Lanny D. Schmidt, “Modeling Catalytic Gauze Reactors: Ammonia oxidation” Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota, 1991.
[8] A. Farouk, H. Farrag, “Modelling of ammonia burner” Alexandria University, 2010.
[9] Rdzawski, Z. M. and Stobrawa, J. P., “Microstructure stability of the Pt/Rh alloys used for catalytic ammonia oxidation”, Journal of achievements in materials and manufacturing engineering, 24, (2007).
[10] Chatteree, I. B. and Joshi, J. B., “Modeling, simulation and optimization: Mono pressure nitric acid process”, Chemical Engineering Journal, 138, 556-557, (2008).
[11] Lawrie Lloyd, “Handbook of industrial catalysts”, springer, 2011.
[12] Jens Hagen, “Industrial catalysis a practical approach” Wiley-VCH, 2006.
[13] Satterfield C. N, “Heterogeneous Catalysis in Practice” McGraw-Hill, New York 1980.
[14] “Technical specification of Ammonia oxidation reactor”, UHDE, EHC company, Egypt, 2013.
Cite This Article
  • APA Style

    Mohamed Abdel Salam, Ehssan Nassef, Eman Elkheriany, Yehia El Tawel. (2016). Modelling and Simulation of Gauze Reactor of Ammonia Oxidation. American Journal of Chemical Engineering, 4(1), 16-22. https://doi.org/10.11648/j.ajche.20160401.13

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    ACS Style

    Mohamed Abdel Salam; Ehssan Nassef; Eman Elkheriany; Yehia El Tawel. Modelling and Simulation of Gauze Reactor of Ammonia Oxidation. Am. J. Chem. Eng. 2016, 4(1), 16-22. doi: 10.11648/j.ajche.20160401.13

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    AMA Style

    Mohamed Abdel Salam, Ehssan Nassef, Eman Elkheriany, Yehia El Tawel. Modelling and Simulation of Gauze Reactor of Ammonia Oxidation. Am J Chem Eng. 2016;4(1):16-22. doi: 10.11648/j.ajche.20160401.13

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  • @article{10.11648/j.ajche.20160401.13,
      author = {Mohamed Abdel Salam and Ehssan Nassef and Eman Elkheriany and Yehia El Tawel},
      title = {Modelling and Simulation of Gauze Reactor of Ammonia Oxidation},
      journal = {American Journal of Chemical Engineering},
      volume = {4},
      number = {1},
      pages = {16-22},
      doi = {10.11648/j.ajche.20160401.13},
      url = {https://doi.org/10.11648/j.ajche.20160401.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajche.20160401.13},
      abstract = {Modelling of catalytic ammonia oxidation reactor for nitric oxide production in nitric acid plant over gauzes of Pt/Rh catalyst was the subject of current study. Viscosity, mass transfer and kinetic equations were used for the gas mixture feeding the reactor, partial pressure and mole fraction of ammonia was essential, also wire diameter was considered to detect platinum losses during oxidation operation. In order to investigate the performance of catalytic oxidation reactor, ordinary equation for determining of conversion yields of ammonia to nitric oxide was solved in mathematical model numerically. Variations of conversion with inlet mixture temperature, mixture concentration, inlet pressure and gauze temperature during cycle were investigated. Platinum losses rate as platinum oxide (PtO2) was studied with gauzes surface temperature by using numerical solution of the mathematical model. Modelling results were compared with an industrial reactor data. Comparing industrial data for all studied variables with those obtained by using mathematical model have shown the higher degree of accuracy of the model to predict the operating values with minimum deviation.},
     year = {2016}
    }
    

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    AU  - Ehssan Nassef
    AU  - Eman Elkheriany
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    N1  - https://doi.org/10.11648/j.ajche.20160401.13
    DO  - 10.11648/j.ajche.20160401.13
    T2  - American Journal of Chemical Engineering
    JF  - American Journal of Chemical Engineering
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    UR  - https://doi.org/10.11648/j.ajche.20160401.13
    AB  - Modelling of catalytic ammonia oxidation reactor for nitric oxide production in nitric acid plant over gauzes of Pt/Rh catalyst was the subject of current study. Viscosity, mass transfer and kinetic equations were used for the gas mixture feeding the reactor, partial pressure and mole fraction of ammonia was essential, also wire diameter was considered to detect platinum losses during oxidation operation. In order to investigate the performance of catalytic oxidation reactor, ordinary equation for determining of conversion yields of ammonia to nitric oxide was solved in mathematical model numerically. Variations of conversion with inlet mixture temperature, mixture concentration, inlet pressure and gauze temperature during cycle were investigated. Platinum losses rate as platinum oxide (PtO2) was studied with gauzes surface temperature by using numerical solution of the mathematical model. Modelling results were compared with an industrial reactor data. Comparing industrial data for all studied variables with those obtained by using mathematical model have shown the higher degree of accuracy of the model to predict the operating values with minimum deviation.
    VL  - 4
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Author Information
  • Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, Egypt

  • Petrochemicals Engineering Department, Faculty of Engineering, Pharos University, Alexandria, Egypt

  • Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, Egypt

  • Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, Egypt

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