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Role of toluene in hydrogen sulfide combustion under Claus condition

Author

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  • Ibrahim, S.
  • Al Shoaibi, A.
  • Gupta, A.K.

Abstract

Experimental investigations on the effect of different amounts of toluene addition to H2S combustion in oxygen under Claus condition (Φ=3) are presented. Three toluene concentrations of 0.5%, 1% and 5% in H2S are presented and compared with the baseline case of 100% H2S oxygen combustion. Temperature data showed that addition of toluene to H2S gas stream increases the flame temperature because of large heating value associated with toluene. Addition of toluene resulted in the production of H2, which increased with increase in the amounts of toluene addition. Furthermore, increased addition of toluene concentration increased the asymptotic minimum value of hydrogen sulfide due to oxidation competition between the formed H2 and H2S. The results also showed that the presence of CO triggers the formation of COS with toluene addition due to reaction of CO with SO2. The results showed that SO2 mole fraction increased to a maximum value then decayed with distance along the reactor. Addition of toluene increased the rate of SO2 decay. These results have direct impact on sulfur capture in the Claus reactor and its performance.

Suggested Citation

  • Ibrahim, S. & Al Shoaibi, A. & Gupta, A.K., 2013. "Role of toluene in hydrogen sulfide combustion under Claus condition," Applied Energy, Elsevier, vol. 112(C), pages 60-66.
    • Handle: RePEc:eee:appene:v:112:y:2013:i:c:p:60-66
    DOI: 10.1016/j.apenergy.2013.05.065
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    References listed on IDEAS

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    1. Selim, H. & Gupta, A.K. & Al Shoaibi, A., 2012. "Effect of CO2 and N2 concentration in acid gas stream on H2S combustion," Applied Energy, Elsevier, vol. 98(C), pages 53-58.
    2. Selim, H. & Al Shoaibi, A. & Gupta, A.K., 2011. "Effect of H2S in methane/air flames on sulfur chemistry and products speciation," Applied Energy, Elsevier, vol. 88(8), pages 2593-2600, August.
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    1. Ibrahim, S. & Al Shoaibi, A. & Gupta, A.K., 2015. "Effect of benzene on product evolution in a H2S/O2 flame under Claus condition," Applied Energy, Elsevier, vol. 145(C), pages 21-26.
    2. Ibrahim, S. & Al Shoaibi, A. & Gupta, A.K., 2015. "Role of toluene to acid gas (H2S and CO2) combustion in H2/O2–N2 flame under Claus condition," Applied Energy, Elsevier, vol. 149(C), pages 62-68.
    3. Ibrahim, S. & Gupta, A.K. & Al Shoaibi, A., 2015. "Xylene and H2S destruction in high temperature flames under Claus condition," Applied Energy, Elsevier, vol. 154(C), pages 352-360.
    4. Li, Yang & Yu, Xinlei & Li, Hongjun & Guo, Qinghua & Dai, Zhenghua & Yu, Guangsuo & Wang, Fuchen, 2017. "Detailed kinetic modeling of homogeneous H2S-CH4 oxidation under ultra-rich condition for H2 production," Applied Energy, Elsevier, vol. 208(C), pages 905-919.

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