MODELING OF ELEMENTAL MERCURY CONTROL BY SORBENTS FROM SIMULATED FLUE GASES
A mathematic model for mercury adsorption using sorbents filter in the fixed-bed system. The detailed model is based on material balances in fixed-bed, key mass transfer, with sorbents surface adsorption process. Mass transfer mechanisms were a combination of two rate controlling steps: fluid-film transfer and pore diffusion. As surface adsorption process, the Freundich equation was used to model sorbents surface kinetic. Mercury adsorption experiments were carried out to determine the best-fit model parameter and the parameter-fitted model was then used to predict the mercury adsorption process. The model also can be used to predict mercury removal performance under various sorbents properties and operating parameters in fixed-bed system. The adsorption system is mass-transfer limited, smaller particle size results in better mercury removal, with large particles surface area limits the rate at which mercury can be absorbed and equilibrium is not approached; For a given temperature, the rate of mercury uptake efficiency increases with an decrease in the initial mercury concentration; For the longer contact residence time of sorbents with the mercury gas, it will enhances the removal efficiency because the external mass transfer resistance limits the removal.
mercury adsorption mathematical modeling the fized bed simulated flue gases
Jianli REN Jinsong ZHOU Yingjie ZHONG Zhang XU Zhongyang LUO
The MOE Key Laboratory of Mechanical Manufacture and Automation, Zhejiang University of Technology, State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang
国际会议
第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)
武汉
英文
869-876
2007-12-01（万方平台首次上网日期，不代表论文的发表时间）