Oxidation of H₂S at atmospheric pressure has been studied under different reaction atmospheres, varying the air excess ratio (λ) from reducing (λ = 0.32) to oxidizing conditions (λ = 19.46). The experiments have been carried out in a tubular flow reactor, in the 700-1400 K temperature range. The concentrations of H₂S, SO₂ and H₂ have been determined and the experimental results have been simulated with a detailed chemical mechanism compiled in the present work. The experimental results obtained indicate that H₂S consumption is shifted to lower temperatures as the stoichiometry increases, starting at 925 K for reducing conditions and at 700 K for the most oxidizing ones. The model reproduces well, in general, the experimental data from the present work, and those from the literature at high pressures. Supported by theoretical calculations, the isomerization of HSOO to HSO₂ has been determined as an alternative and possible pathway to the final product SO₂, from the key SH + O₂ reaction.

已经在不同的反应气氛下研究了大气压下H ₂ S的氧化，将空气过量比（λ）从还原（λ= 0.32）更改为氧化条件（λ= 19.46）。实验是在700-1400 K温度范围的管式流动反应器中进行的。确定了H ₂ S，SO ₂和H ₂的浓度，并通过本工作中详细的化学机理模拟了实验结果。实验结果表明，H ₂随着化学计量的增加，S的消耗转移到较低的温度，还原条件从925 K开始，大多数氧化条件从700 K开始。通常，该模型可以很好地重现当前工作的实验数据以及高压文献的实验数据。在理论计算的支持下，已确定从关键的SH + O ₂反应中，HSOO异构化为HSO ₂是最终产物SO ₂的替代途径和可能途径。