Investigation of sulfur chemistry with acid gas addition in hydrogen/air flames

H. Selim, S. Ibrahim, A. Al Shoaibi and A.K. Gupta

Applied Energy, 2014, vol. 113, issue C, 1134-1140

Abstract: Investigations on the effect of acid gas (H2S and CO2) addition in hydrogen/air flame are presented. The specific equivalence ratios examined include Claus conditions (Φ=3.0) as well as stoichiometric conditions (Φ=1.0) and fuel-lean conditions (Φ=0.5). Two different acid gas compositions of 100% H2S, and 50% H2S/50% CO2 are reported. Addition of pure hydrogen sulfide acid gas deteriorated the rate of hydrogen oxidation in the hydrogen/air flame. Combustion of hydrogen sulfide alone formed sulfur dioxide rather than more favorable elemental sulfur. In contrast combustion of 50% H2S/50% CO2 acid gas stream produced faster decomposition/production of H2S, SO2, and H2. Presence of carbon monoxide was a distinct mark on the release of oxygen from CO2 into the reaction pool. The presence of carbon monoxide triggered the formation of other sulfurous–carbonaceous compounds, such as COS and CS2.

Keywords: Sulfur chemistry; Claus process; H2S treatment; H2S combustion (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (6)

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DOI: 10.1016/j.apenergy.2013.08.054

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