中文摘要：

模拟固定床脱除烟气中的单质汞吸附系统，基于颗粒内外的传质控制过程，建立了由固定床反应系统质量平衡、传质过程以及吸附剂表面反应过程等综合决定的吸附动力学数学模型，分别进行了试验数据模拟和吸附剂性质及运行参数等影响的预测分析．结果表明，对活性炭基本工况吸附过程的模拟结果和试验数据基本吻合；模型分析预测了在一定运行条件下活性炭吸附剂的吸附性能曲线：随颗粒粒径增大，吸附量曲线上升幅度减缓，吸附效率降低，表明在传质因素控制下，较小的颗粒粒径具有较大的比表面积，对促进吸附更有利；在吸附温度不变，保证一定m（C）：m（Hg）的条件下，随着入口浓度的增大，单位吸附量相应增大，活性炭的利用率提高；增加含Hg气体与吸附层之间的接触时间，可有效延长达到100％的穿透时间，但单位吸附量降低．

英文摘要：

A mathematical model was developed to simulate elemental mercury sorption in the fixed bed reaction system, which is based on the mechanisms of mass transfer from external surfaces to internal surfaces and interior of sorbents particle. The detailed model was combined with surface equilibrium process, key mass transfer, and material balance equations that govern adsorption of Hg vapors. The model was used to model mercury sorption processes at different conditions in laboratory fixed-bed tests, and to predict the Hg removal performance with the effect of various sorbents properties and operating parameters. The simulation results indicated that the model is capable of describing the test data, and that the particle size, contact time, mercury inlet content, adsorption temperature and etc, influence the removal capacities. The system is mass-transfer limited, and smaller particle size results in better mercury removal, while large particles surface area limits the rate at which mercury can be absorbed and equilibrium is not approached; For a given temperature and C/Hg ratio, the rate of mercury uptake increases with an increase in the initial mercury concentration, and the longer contact residence time of sorbents with the gas, the more sorbents are available that allows 100 % ratio at breakthrough curve to be approached more slowly, however, sorbents possess a lower absorption capacity of per unit mass.