Abstract Porous carbon-based sorbents are considered as one of the most promising materials for solving atmospheric mercury pollution. In this study, a novel porous carbon-based sorbents ZnS/AC were prepared from high sulfur petroleum coke (HSPC) and zinc nitrate by in-situ method. The as-prepared ZnS/AC sorbents were characterized by BET, XRD, ICP-OES and XPS analyses, and the element mercury removal performance of these sorbents from the simulated coal derived fuel gas were evaluated using a bench-scale fixed-bed reactor. The effects of atmospheres and temperatures on the Hg0 removal performance of ZnS/AC sorbents were also studied. The mercury removal efficiency could maintain above 84% within 4 h at ≤120 °C under N2 + H2 + H2S atmospheres. The higher temperature was not conducive to mercury removal. The average mercury removal efficiency was only 30% within 2 h at 180 °C. Hydrogen sulfide (H2S) significantly improved the mercury removal performance of the ZnS/AC sorbent, while the concentration of H2S hardly affected the mercury removal efficiency. The mercury removal efficiency of the regenerated ZnS/AC sorbents after mercury capture still maintained above 85% within 6 h at 120 °C after three cycles of capture-regeneration, it can be concluded that ZnS/AC sorbent is a promising and efficient sorbent for removing elemental mercury from fuel gases.

中文翻译：

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用于脱汞的高硫石油焦衍生的 ZnS/AC 吸附剂

摘要 多孔碳基吸附剂被认为是解决大气汞污染最有前景的材料之一。在本研究中，以高硫石油焦 (HSPC) 和硝酸锌为原料，采用原位法制备了一种新型多孔碳基吸附剂 ZnS/AC。所制备的 ZnS/AC 吸附剂通过 BET、XRD、ICP-OES 和 XPS 分析进行表征，并使用实验室规模的固定床反应器评估这些吸附剂从模拟煤衍生燃料气中去除元素汞的性能。还研究了气氛和温度对 ZnS/AC 吸附剂的 Hg0 去除性能的影响。在N2+H2+H2S气氛下，≤120℃，4小时内除汞效率可保持在84%以上。较高的温度不利于除汞。在 180 °C 下，2 小时内的平均除汞效率仅为 30%。硫化氢 (H2S) 显着提高了 ZnS/AC 吸附剂的除汞性能，而 H2S 的浓度几乎不影响除汞效率。捕汞后再生的 ZnS/AC 吸附剂在 120 ℃ 3 次捕集-再生循环后 6 h 内的除汞效率仍保持在 85% 以上，可以得出结论，ZnS/AC 吸附剂是一种有前景且高效的吸附剂。从燃料气体中去除元素汞。