溴素改性活性炭汞吸附特性研究

发布时间：2018-05-19 04:36

  本文选题：溴素 + 改性活性炭　； 参考：《工程热物理学报》2014年12期

【摘要】：在固定床实验台上进行了1%NH_4Br改性活性炭汞吸附实验。利用吸附动力学模型从动力学角度探讨了汞吸附速率控制步,汞吸附活化能与初始汞吸附速率。结果表明:150℃时,1%NH_4Br改性活性炭脱汞能力显著增强,其原因是改性后活性炭表面活性位点(Br)明显增加,强化了化学吸附作用。但低温时,化学吸附增强作用不明显。汞在改性活性炭表面的吸附活化能为29.69 kJ/mol,说明吸附以物理吸附为主,化学吸附为辅。改性活性炭的初始汞吸附速率随温度增加而增加。活性位吸附是汞吸附速率控制步,外部传质控制也影响整个汞吸附过程,吸附遵循Langmuir吸附等温方程。
[Abstract]:The mercury adsorption experiment of 1%NH_4Br modified activated carbon was carried out on a fixed bed test bench. Based on the adsorption kinetics model, the control steps of mercury adsorption rate, the activation energy of mercury adsorption and the initial adsorption rate of mercury were discussed from the point of view of kinetics. The results showed that the decarbonization ability of activated carbon modified by NH _ 4BR was significantly enhanced at 150 鈩，

本文编号：1908753