Optimum Operating Conditions for Direct Oxidation of H2S in a Fluidized Bed Reactor
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.
[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.
[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.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:62446", author = "Fahimeh Golestani and Mohammad Kazemeini and Moslem Fattahi and Ali Amjadian", title = "Optimum Operating Conditions for Direct Oxidation of H2S in a Fluidized Bed Reactor", abstract = "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 = "Direct oxidization, Fluidized bed, H2S, Mathematical modeling, Optimum conditions.", volume = "5", number = "7", pages = "640-5", }
