Wang Ligang, Peng Suping, Chen Changhe
Department of Thermal Engineering, Tsinghua University, Beijing 100084, China.
Huan Jing Ke Xue. 2003 Nov;24(6):59-62.
Through the simulation experimentation, the Hg adsorption characteristics of fly ash in flue gas were studied carefully in laboratory. From the experiment results it was found that Hg adsorption capacity of different porous medium in fly ash was different obviously. Unburned carbon had higher Hg adsorption capacity. The surface-area of BET sorbent had positive correlation with Hg adsorption capacity. Hg concentration in blend gas had non-linearity relationship with Hg adsorption capacity. Hg adsorption capacity of 5 x 10(-7) Hg concentration was only 1/2 compared to that of 5 x 10(-6). Adsorption temperature had negative correlation with it. C=O in unburnt carbon surface was beneficial to oxidation and chemic adsorption of Hg. It was obtained that the porous structure and huge surface-area of the unburned carbon was benefit to the Hg adsorption in flue gas.
通过模拟实验，在实验室中对烟气中粉煤灰的汞吸附特性进行了仔细研究。从实验结果发现，粉煤灰中不同多孔介质的汞吸附能力明显不同。未燃尽碳具有较高的汞吸附能力。BET吸附剂的表面积与汞吸附能力呈正相关。混合气体中的汞浓度与汞吸附能力呈非线性关系。5×10(-7)汞浓度下的汞吸附能力仅为5×10(-6)时的1/2。吸附温度与之呈负相关。未燃尽碳表面的C=O有利于汞的氧化和化学吸附。得出未燃尽碳的多孔结构和巨大表面积有利于烟气中汞的吸附。
