In this study, a series of Na₂S- and S⁰-decorated ZSM-5 adsorbents were prepared and their Hg⁰ adsorption performance was evaluated. Given that S⁰ and Na₂S were co-doped with the mass ratio of S⁰ to ZSM-5 fixed to 2:1, Hg⁰ removal efficiency quadruples compared with raw ZSM-5 and reached ca. 100% at 300 °C. Combined with the characterization results, it could be concluded that chemical properties, instead of physical structures, played an important role in Hg⁰ removal. Among the various gas components, O₂, NO, and SO₂ made negligible impacts on Hg⁰ capture over 2:1-S/ZSM-5 adsorbent surface. After recycling four times, Hg⁰ removal efficiency of 2:1-S/ZSM-5 adsorbent remained higher than 80%, which was indicative of a certain recyclability. Finally, XPS results illustrated that S⁰ and S²⁻ on 2:1-S/ZSM-5 surface functioned as the active sites for the transformation of Hg⁰ to HgS, which facilitated the chemisorption process and consequently led to an improved Hg⁰ capture performance.

本研究制备了一系列Na ₂ S-和S ⁰修饰的ZSM-5吸附剂，并对其Hg ⁰吸附性能进行了评价。鉴于 S ⁰和 Na ₂ S以固定为 2:1的 S ⁰与 ZSM-5的质量比共掺杂，Hg ⁰去除效率与原始 ZSM-5 相比提高了四倍，并达到了大约10 倍。300°C 时为 100%。结合表征结果，可以得出结论，化学性质而非物理结构在 Hg ⁰去除中起重要作用。在各种气体成分中，O ₂、NO、SO ₂对Hg的影响微乎其微⁰捕获超过 2:1-S/ZSM-5 吸附剂表面。循环四次后，2:1-S/ZSM-5吸附剂的Hg ⁰去除率仍保持在80%以上，具有一定的可回收性。最后，XPS 结果表明2:1-S/ZSM-5 表面上的S ⁰和 S ²⁻作为活性位点将Hg ⁰转化为 HgS，这促进了化学吸附过程，从而提高了 Hg ⁰捕捉性能。