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Effect of benzene on product evolution in a H2S/O2 flame under Claus condition

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

Abstract

Experimental results are presented on the role of benzene addition to H2S combustion at an equivalence ratio of three with respect to H2S (Claus condition) and complete combustion of benzene. The results are reported with 0.3%, 0.5% and 1% benzene addition to H2S/O2 flame. Combustion of H2S and benzene mixtures is of practical value for sulfur recovery during combustion of acid gases. The results showed that H2S combustion caused H2S to decompose to a minimum mole fraction with high conversion of H2S while the SO2 mole fraction reached a maximum value. Addition of benzene decreased the conversion of H2S with reduced mole fraction of SO2 in the reactor to subsequently reduce the formation of elemental sulfur. Benzene also caused significant production of H2, CO and COS formation along with faster decomposition of the formed SO2. Presence of benzene, even in trace amounts, in acid gas hinders sulfur conversion in a Claus reactor and increases emission of unwanted sulfur bearing compounds. Increased hydrogen production with benzene offers potential value for hydrogen recovery under certain conditions.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:appene:v:145:y:2015:i:c:p:21-26
    DOI: 10.1016/j.apenergy.2015.01.094
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    References listed on IDEAS

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    1. Selim, H. & Al Shoaibi, A. & Gupta, A.K., 2011. "Experimental examination of flame chemistry in hydrogen sulfide-based flames," Applied Energy, Elsevier, vol. 88(8), pages 2601-2611, August.
    2. Selim, H. & Gupta, A.K. & Al Shoaibi, A., 2013. "Effect of reaction parameters on the quality of captured sulfur in Claus process," Applied Energy, Elsevier, vol. 104(C), pages 772-776.
    3. 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.
    4. Selim, H. & Gupta, A.K. & Sassi, M., 2012. "Novel error propagation approach for reducing H2S/O2 reaction mechanism," Applied Energy, Elsevier, vol. 93(C), pages 116-124.
    5. 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.
    6. 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.
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    Cited by:

    1. 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.
    2. Li, Yang & Yu, Xinlei & Li, Hongjun & Guo, Qinghua & Dai, Zhenghua & Yu, Guangsuo & Wang, Fuchen, 2017. "Detailed kinetic modelling of H2S oxidation with presence of CO2 under rich condition," Applied Energy, Elsevier, vol. 190(C), pages 824-834.

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