Handling molten sulfur is inherently difficult due to liquid sulfur's extreme rheological behavior. Upon melting at 115°C, sulfur's viscosity remains low until reaching 160°C, the λ‐transition region, where the viscosity increases to a maximum of 93,000 × 10⁻³ Pa s at 187°C. Within this study, our previous viscosity measurements for pure liquid elemental sulfur have been discussed along with new measurements on sulfur containing physically and chemically dissolved hydrogen sulfide (H₂S). H₂S is always incorporated into industrial sulfur which has been recovered through the modified Claus process in gas plants and oil refineries. Using the experimental data from this study, a semi‐empirical correlation model was reported based on the reptation model of Cates to estimate the impact of H₂S on liquid sulfur's viscosity as a function of temperature. The equation can be applied to commercial sources of sulfur with 0–500 ppm of total dissolved H₂S.

中文翻译：

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硫化氢对液态元素硫流变特性的改性作用

由于液态硫的极端流变行为，固有地难以处理熔融硫。在115°C熔化后，硫的粘度保持较低，直到达到λ过渡区160°C，在187°C时，粘度增加到最大93,000×10 ^-3 Pa s。在这项研究中，我们讨论了我们以前对纯液态元素硫的粘度测量，以及对含有物理和化学溶解的硫化氢（H ₂ S）的硫的新测量。高₂硫总是掺入工业硫中，而工业硫已通过改进的克劳斯工艺在煤气厂和炼油厂中回收。使用这项研究的实验数据，基于Cates的模型，报道了一个半经验的相关模型，以估计H ₂ S对液态硫粘度随温度的影响。该方程式适用于总溶解H ₂ S为0-500 ppm的商业硫源。