Activated carbon was evaluated under O₂/CO₂ conditions to explore the effects of SO₂ on the mercury adsorption. The pseudo-first-order kinetic model and intraparticle diffusion kinetic model were used to analyze the kinetic mechanism of the mercury adsorption process. The experimental results revealed that SO₂ promoted the mercury breakthrough rate in similar O₂/CO₂ conditions compared with that without SO₂. The inner relationship between SO₂ concentration and external mass transfer rate was investigated. The pseudo-first-order kinetic model described the process of mercury adsorption by activated carbon better compared with the intraparticle diffusion kinetic model. The external mass transfer rate was the main rate-control step in this experimental condition. All those findings are very important for mercury control by sorbents under oxy-fuel combustion.

中文翻译：

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在O ₂ / CO ₂条件下，SO ₂对活性炭吸附Hg的影响。第1部分：实验和动力学研究

在O ₂ / CO ₂条件下评估了活性炭，以探索SO ₂对汞吸附的影响。利用拟一阶动力学模型和颗粒内扩散动力学模型分析了汞吸附过程的动力学机理。实验结果表明，与不使用SO ₂相比，在相似的O ₂ / CO ₂条件下，SO ₂促进了汞的穿透率。SO ₂之间的内在联系研究了浓度和外部传质速率。与颗粒内扩散动力学模型相比，拟一级动力学模型更好地描述了活性炭对汞的吸附过程。在该实验条件下，外部传质速率是主要的速率控制步骤。所有这些发现对于在氧气-燃料燃烧下通过吸附剂控制汞非常重要。