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Optimum Operating Conditions for Direct Oxidation of H2S in a Fluidized Bed Reactor

Authors: Fahimeh Golestani, Mohammad Kazemeini, Moslem Fattahi, Ali Amjadian


In this research a mathematical model for direct oxidization of hydrogen sulfide into elemental sulfur in a fluidized bed reactor with external circulation was developed. As the catalyst is deactivated in the fluidized bed, it might be placed in a reduction tank in order to remove sulfur through heating above its dew point. The reactor model demonstrated via MATLAB software. It was shown that variations of H2S conversion as well as; products formed were reasonable in comparison with corresponding results of a fixed bed reactor. Through analyzing results of this model, it became possible to propose the main optimized operating conditions for the process considered. These conditions included; the temperature range of 100-130ºC and utilizing the catalyst as much as possible providing the highest bed density respect to dimensions of bed, economical aspects that the bed ever remained in fluidized mode. A high active and stable catalyst under the optimum conditions exhibited 100% conversion in a fluidized bed reactor.

Keywords: Mathematical Modeling, fluidized bed, H2S, optimum conditions, Direct oxidization

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[1] P. Nguyen, D. Edouard, J.-M. Nhut, M.J. Ledoux, Ch. Pham, C. Pham- Huu, "High thermal conductive β-SiC for selective oxidation of H2S: A new support for exothermal reactions," Applied Catalysis B: Environmental, vol. 76, pp. 300-310, 2007.
[2] Laura M. Nevatalo, Annukka E. Mäkinen, Anna H. Kaksonen, Jaakko A. Puhakka, "Biological hydrogen sulfide production in an ethanollactate fed fluidized-bed bioreactor," Bioresource Technology, vol. 101, pp. 276-284, 2010.
[3] F.P. van der Zee, S. Villaverde, P.A. Garcia, F. Fdz.-Polanco, "Sulfide removal by moderate oxygenation of anaerobic sludge environments," Bioresource Technology, vol. 98, pp. 518-524, 2007.
[4] Marc J. Ledoux, Cuong Pham-Huu, Nicolas Keller, Jean-B. Nougayrède, Sabine Savin-Poncet, Jacques Bousquet, "Selective oxidation of H2S in Claus tail-gas over SiC supported NiS2 catalyst," Catalysis Today, vol. 61, pp. 157-163, 2000.
[5] Nicolas Keller, Cuong Pham-Huu, Claude Crouzet, Marc J. Ledoux, Sabine Savin-Poncet, Jean-B. Nougayrede, Jacques Bousquet, "Direct oxidation of H2S into S. New catalysts and processes based on SiC support," Catalysis Today, vol. 53, pp. 535-542, 1999.
[6] Sahar Keshavarzi, Catalytic propane dehydrogenation modeling in twozone fluidized bed reactor, M.Sc. Thesis, Sharif University of Technology, Tehran, Iran, 2007.
[7] Besma Khiari, Frederic Marias, Fethi Zagrouba, Jean Vaxelaire, "Transient mathematical modelling of a fluidized bed incinerator for sewage sludge," Journal of Cleaner Production, vol. 16, pp. 178-191, 2008.
[8] Francesco Miccio, Farouk M. Okasha, "Fluidized bed combustion and desulfurization of a heavy liquid fuel," Chemical Engineering Journal, vol. 105, pp. 81-89, 2005.
[9] Liang Yu, Jing Lu, Xiangping Zhang, Suojiang Zhang, "Numerical simulation of the bubbling fluidized bed coal gasification by the kinetic theory of granular flow (KTGF)," Fuel, vol. 86, pp.722-734, 2007.
[10] D.Y.C. Leung, C.L. Wang, "Fluidized-bed gasification of waste tire powders, Fuel Processing Technology," vol. 84, pp. 175-196, 2003.
[11] O. Rubio, J. Herguido, and M. Menendez, G. Grasa and J. C. Abanades, "Oxidative Dehydrogenation of Butane in an Interconnected Fluidized- Bed Reactor," AIChE Journal, vol. 50, pp. 1510-1522, 2004.
[12] Masayuki Horio, Akira Nonaka, "A generalized bubble diameter correlation for gas-solid fluidized beds," AIChE Journal, vol. 33, pp. 1865-1872, 1987.
[13] Daizeo Kunii, Octave Levenspiel, "Fluidization Engineering," Butterworth-Heinemann, 2nd Edition, 1991.
[14] D. Geldart, Gas fluidization technology, John Wiley & Sons, Great Britain, 1986.
[15] Nicolas Keller, Cuong Pham-Huu, Claude Estournès, Marc J. Ledoux, "Low temperature use of SiC-supported NiS2-based catalysts for selective H2S oxidation, Role of SiC surface heterogeneity and nature of the active phase," Applied Catalysis A: General, vol. 234, pp. 191-205, 2002.