Reduced Mechanism for Hydrogen Sulfide Oxidation

Hydrogen sulfide is one of the most common gases accompanying fuels in oil and gas refinery processes. This gas has very harmful effect on the human health and environment so that it must be removed in an effective and efficient manner before using this fuel. These problems triggered the interest to study the chemistry of hydrogen sulfide oxidation, as it is mainly treated by chemical reactions. Simplification of the reaction mechanism will enable us to understand the properties of the chemical processes that occur during the process of hydrogen sulfide treatment. Reduction strategy is carried out here in order to reduce the detailed mechanism, where the direct relation graph and error propagation methodology (DRGEP) has been used in this paper. The results obtained from the resulting reduced mechanism showed very good agreement with the detailed chemistry results under different reaction conditions. However, some discrepancies have been found for some species, especially in the hydrogen and oxygen mole fractions. The reduced mechanism is also capable of tracking the difference in chemical kinetics that takes place due to the change in reaction conditions.

[1]  H. Pitsch,et al.  An efficient error-propagation-based reduction method for large chemical kinetic mechanisms , 2008 .

[2]  R. Lindstedt,et al.  Systematically reduced chemical mechanisms for sulfur oxidation and pyrolysis , 2006 .

[3]  Tianfeng Lu,et al.  Linear time reduction of large kinetic mechanisms with directed relation graph: N-Heptane and iso-octane , 2006 .

[4]  B. Haynes,et al.  Gas-phase interaction of H2S with O2: A kinetic and quantum chemistry study of the potential energy surface. , 2005, The journal of physical chemistry. A.

[5]  Noman Haimour,et al.  Claus recycle with double combustion process , 2004 .

[6]  P. Glarborg,et al.  Experimental and kinetic modeling study of the effect of NO and SO2 on the oxidation of CO ? H2 mixtures , 2003 .

[7]  A. Zagoruiko,et al.  Mathematical modelling of Claus reactors undergoing sulfur condensation and evaporation , 2002 .

[8]  R. Larraz.  Influence of fractal pore structure in Claus catalyst performance , 2002 .

[9]  Peter Glarborg,et al.  Inhibition and sensitization of fuel oxidation by SO2 , 2001 .

[10]  K. Schofield.  The kinetic nature of sulfur’s chemistry in flames , 2001 .

[11]  R. L. Mora.  Sulphur condensation influence in Claus catalyst performance. , 2000, Journal of hazardous materials.

[12]  Kelly Hawboldt,et al.  New experimental data and kinetic rate expression for the Claus reaction , 2000 .

[13]  K. Hawboldt,et al.  New experimental data and kinetic rate expression for H2S pyrolysis and re-association , 2000 .

[14]  Peter Glarborg,et al.  Impact of SO2 and NO on CO oxidation under post‐flame conditions , 1996 .

[15]  Colin Webb,et al.  Treatment of H2S-containing gases : a review of microbiological alternatives , 1995 .

[16]  O. Smith,et al.  High‐temperature kinetics of the reactions of SO2 and SO3 with atomic oxygen , 1982 .

[17]  John H. S. Lee,et al.  Oxidation of hydrogen sulfide , 1981 .