Abstract The paper presents a detailed kinetic study on H2S formation during fuel-rich combustion of pulverized coal via tube furnace experiment and kinetic analysis with Chemkin. A new detailed kinetic model involving 34 species and 115 reactions was developed, with emphasis on CS2 as a source for H2S. The novel model was validated using experimental data with respect to the concentration distributions of H2, CO, H2O, CO2, SO2, H2S, COS and CS2. Sensitivity analysis shows that H2S concentration was very sensitive to reactions (2) H2S + H = SH + H2, (89) SO2 + CO = SO + CO2, (104) COS + H2O = H2S + CO2, (62) HOSO (+M) = H + SO2 (+M), (103) CS2 + H2O = H2S + COS, etc. Also, SH, S, and SO were the key free radicals for H2S production. Rate of production analysis (ROP) were also performed, which indicate that SH was the most important precursor of H2S. Based on the detailed kinetic model and ROP analysis, the simplified reaction path of H2S formation was constructed. Finally, the new model was compared with the Leeds University sulfur chemistry model. The two models have the same key free radicals and four major elementary reactions. The main difference is that CS2 was a notable source for H2S in our model targeted for coal combustion, and should be given special attention.

中文翻译：

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粉煤富燃料燃烧过程中 H2S 形成的详细动力学模型

摘要 本文通过管式炉实验和Chemkin 动力学分析，详细介绍了煤粉富燃料燃烧过程中H2S 形成的动力学研究。开发了一个新的详细动力学模型，涉及 34 种物质和 115 个反应，重点是 CS2 作为 H2S 的来源。使用关于 H2、CO、H2O、CO2、SO2、H2S、COS 和 CS2 浓度分布的实验数据验证了新模型。灵敏度分析表明 H2S 浓度对反应非常敏感 (2) H2S + H = SH + H2, (89) SO2 + CO = SO + CO2, (104) COS + H2O = H2S + CO2, (62) HOSO (+ M) = H + SO2 (+M)、(103) CS2 + H2O = H2S + COS 等。此外，SH、S 和 SO 是产生 H2S 的关键自由基。还进行了生产率分析 (ROP)，这表明 SH 是 H2S 最重要的前体。基于详细的动力学模型和 ROP 分析，构建了 H2S 生成的简化反应路径。最后，将新模型与利兹大学硫化学模型进行了比较。这两个模型具有相同的关键自由基和四个主要的基本反应。主要区别在于，在我们针对煤燃烧的模型中，CS2 是 H2S 的显着来源，应特别注意。