We studied hydrogen sulfide (H2S) decomposition into hydrogen (H2) and sulfur (S2) in a gliding arc plasmatron (GAP) and microwave (MW) plasma by a combination of 0D and 2D models. The conversion, energy efficiency, and plasma distribution are examined for different discharge conditions, and validated with available experiments from literature. Furthermore, a comparison is made between GAP and MW plasma. The GAP operates at atmospheric pressure, while the MW plasma experiments to which comparison is made were performed at reduced pressure. Indeed, the MW discharge region becomes very much contracted near atmospheric pressure, at the conditions under study, as revealed by our 2D model. The models predict that thermal reactions play the most important role in H2S decomposition in both plasma types. The GAP has a higher energy efficiency but lower conversion than the MW plasma at their typical conditions. When compared at the same conversion, the GAP exhibits a higher energy efficiency and lower energy cost than the MW plasma.

中文翻译：

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等离子技术将H2S分解成H2和S2：滑弧和微波等离子的比较

我们通过 0D 和 2D 模型的组合研究了在滑弧等离子管 (GAP) 和微波 (MW) 等离子体中硫化氢 (H2S) 分解为氢 (H2) 和硫 (S2) 的情况。在不同的放电条件下检查转化率、能量效率和等离子体分布，并通过文献中的可用实验进行验证。此外，还对 GAP 和 MW 等离子体进行了比较。GAP 在大气压下运行，而与之进行比较的 MW 等离子体实验是在减压下进行的。事实上，正如我们的 2D 模型所揭示的那样，在所研究的条件下，MW 放电区域在接近大气压的情况下变得非常收缩。这些模型预测热反应在两种等离子体类型的 H2S 分解中起着最重要的作用。在典型条件下，GAP 具有比 MW 等离子体更高的能量效率但转化率更低。在相同转化率下进行比较时，GAP 比 MW 等离子体具有更高的能效和更低的能源成本。