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Effect of CO2 and N2 concentration in acid gas stream on H2S combustion

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  • Selim, H.
  • Gupta, A.K.
  • Al Shoaibi, A.

Abstract

The Effect of the presence of nitrogen and carbon dioxide in H2S acid gas stream is investigated. Concentrations of up to 30% of N2 or CO2 in H2S stream have been examined. All cases were compared with the baseline case of 100% H2S acid gas stream. Temperature measurements showed that injection of CO2 or N2 in the H2S stream decreases the flame temperature. However, injection of CO2 resulted in temperature increase downstream. Increase of carbon dioxide in the acid gas stream increased SO2 mole fraction in the byproducts. In addition, the increase of CO2 decreased the asymptotic value of H2S at downstream locations. Furthermore, the presence of CO2 decreased the amount of sulfur captured during the reaction process. This is attributed to increase in oxidizing medium in the reaction pool from the presence of carbon dioxide. The increase in oxygen fostered H2S combustion to form higher amounts of SO2. Subsequently, the amount of captured sulfur and asymptotic value of H2S decreased. On the other hand, the presence of nitrogen in the acid gas stream did not affect the reaction process significantly. Nitrogen acted as an inert gas on the reactants and did not affect the reaction chemistry.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:appene:v:98:y:2012:i:c:p:53-58
    DOI: 10.1016/j.apenergy.2012.02.072
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    References listed on IDEAS

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    1. 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. Li, Yang & Guo, Qinghua & Yu, Xinlei & Dai, Zhenghua & Wang, Yifei & Yu, Guangsuo & Wang, Fuchen, 2017. "Effect of O2 enrichment on acid gas oxidation and formation of COS and CS2 in a rich diffusion flame," Applied Energy, Elsevier, vol. 206(C), pages 947-958.
    3. Ibrahim, S. & Al Shoaibi, A. & Gupta, A.K., 2014. "Toluene destruction in thermal stage of Claus reactor with oxygen enriched air," Applied Energy, Elsevier, vol. 115(C), pages 1-8.
    4. Bassani, Andrea & Pirola, Carlo & Maggio, Enrico & Pettinau, Alberto & Frau, Caterina & Bozzano, Giulia & Pierucci, Sauro & Ranzi, Eliseo & Manenti, Flavio, 2016. "Acid Gas to Syngas (AG2S™) technology applied to solid fuel gasification: Cutting H2S and CO2 emissions by improving syngas production," Applied Energy, Elsevier, vol. 184(C), pages 1284-1291.
    5. Davazdah Emami, Sina & Kasmani, Rafiziana Md. & Hamid, Mahar Diana & Che Hassan, Che Rosmani & Mokhtar, Khairiah Mohd, 2016. "Kinetic and dynamic analysis of hydrogen-enrichment mixtures in combustor systems – A review paper," Renewable and Sustainable Energy Reviews, Elsevier, vol. 62(C), pages 1072-1082.
    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.
    7. Selim, H. & Ibrahim, S. & Al Shoaibi, A. & Gupta, A.K., 2013. "Effect of oxygen enrichment on acid gas combustion in hydrogen/air flames under claus conditions," Applied Energy, Elsevier, vol. 109(C), pages 119-124.
    8. Selim, H. & Ibrahim, S. & Al Shoaibi, A. & Gupta, A.K., 2014. "Investigation of sulfur chemistry with acid gas addition in hydrogen/air flames," Applied Energy, Elsevier, vol. 113(C), pages 1134-1140.
    9. 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.
    10. 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.
    11. El-Melih, A.M. & Al Shoaibi, A. & Gupta, A.K., 2017. "Reformation of hydrogen sulfide to hydrogen in the presence of xylene," Applied Energy, Elsevier, vol. 203(C), pages 403-411.
    12. 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.
    13. El-Melih, A.M. & Al Shoaibi, A. & Gupta, A.K., 2016. "Hydrogen sulfide reformation in the presence of methane," Applied Energy, Elsevier, vol. 178(C), pages 609-615.

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