中文摘要：

在模拟烟气管道内对一种商业活性炭进行喷射脱汞实验,研究活性炭粒径、烟气温度、烟气汞浓度、停留时间及活性炭喷射量对烟气中汞脱除的影响。建立了活性炭烟气喷射脱汞过程的数学模型,对上述汞吸附过程进行理论分析和讨论。结果表明减小活性炭粒径或增大烟气汞浓度,可增大烟气中汞向活性炭表面传递的膜传质速率及活性炭表面的汞向活性炭内部传递的内扩散速率,提高了喷射脱汞效率。增加活性炭在烟道中的停留时间,可增加汞向活性炭内部的扩散吸附机会。喷射条件下停留时间远远低于吸附平衡的时间,活性位吸附成为汞吸附过程的主要控制步。烟气温度升高,物理吸附作用降低,脱汞性能下降；增加活性炭喷射量可增加脱汞率,但活性炭的单位汞吸附量有所降低。

英文摘要：

An experimental study on mercury capture was carried out using a commercial activated carbon injection into a duct of simulated flue gas. Influences of particle size, temperature, mercury concentration, residence time, and activated carbon load amount on mercury removal efficiency were investigated. A mathematical model describing mercury adsorption by activated carbon injection was established, which interprets chemical dynamic mechanism of mercury adsorption. The results show that reducing the particle size or increasing the mercury concentration can both speed up film mass transfer rate of mercury from gas to surface of the activated carbon and rise intraparticle diffusion rate of mercury from surface to internal pores,which then improves mercury removal rate. Longer residence time is beneficial to the mercury deposition on the inner pores. Owing to far less residence time to the adsorption equilibrium, the mercury adsorption on active sites is recognized as the control step. Higher temperature reduces physisorption ability leading to decrease in mercury removal ability. Increase of loading amount of activated carbon results in higher mercury removal, but reduces the mercury accumulative adsorption per unit quality of sorbent.