Sulphur oxides (SO_x) are a major air pollutant regulated by European legislations. To date, most efficient DeSOx technologies are energy-intensive and produce high amounts of waste. Thus CuO/SiO₂ adsorbents represent a viable SO_x trapping alternative. However, their large-scale development is hampered by the sintering of the active phase over multiple adsorption and regeneration cycles, leading to the progressive decrease in performance of the adsorbent. In this work, a CuO/SBA-15 adsorbent was assessed as a SOx trap material and different regenerations methods were evaluated with the aim to limit that sintering phenomenon and assure the conservation of SO₂ adsorption performance over several adsorption and regeneration cycles. It was found that a regenerative treatment under 0.5 vol% of H₂ in N₂ can be carried out either at 300 °C or 400 °C, without any substantial loss of SO₂ adsorption performance over 8 successive cycles. A diffusional-limited decomposition mechanism describes the different steps of the regeneration stage, especially the kinetics of the regeneration step that is governed by the H₂ transport within the porosity. The SO₂ adsorption process was not the main degradation path of the textural properties of the adsorbent but the latter are strongly affected by the thermal effect associated to the adsorption and regeneration cycling.

硫氧化物（SO _x）是欧洲法规规定的主要空气污染物。迄今为止，最有效的DeSOx技术消耗大量能源，并产生大量废物。因此，CuO / SiO ₂吸附剂代表了可行的SO _x捕集替代品。然而，在多个吸附和再生循环中，活性相的烧结阻碍了它们的大规模开发，从而导致吸附剂性能的逐渐下降。在这项工作中，CuO / SBA-15吸附剂被评估为SOx捕集材料，并评估了不同的再生方法，目的是限制烧结现象并确保SO ₂的保存。在几个吸附和再生循环中的吸附性能。已经发现，可以在300℃或400℃下在0.5体积％的N _2中的H ₂中进行再生处理，而在连续的8个循环中基本不损失SO ₂吸附性能。扩散受限的分解机理描述了再生阶段的不同步骤，尤其是再生步骤的动力学，该动力学受孔隙度内H ₂传输的支配。SO ₂吸附过程不是吸附剂质地特性的主要降解途径，但后者会受到与吸附和再生循环相关的热效应的强烈影响。