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首页> 外文期刊>Environmental Science & Technology >Simultaneous removal of SO2 and trace SeO2 from flue gas: Effect of product layer on mass transfer
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Simultaneous removal of SO2 and trace SeO2 from flue gas: Effect of product layer on mass transfer

机译：从烟气中同时去除SO2和痕量SeO2：产物层对传质的影响

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摘要

Sulfur dioxide (SO2) and trace elements are all pollutants derived from coal combustion. This study relates to the simultaneous removal of sulfur and trace selenium dioxide (SeO2) by calcium oxide (CaO) adsorption in the medium temperature range, especially the mass transfer effect of sulfate product layer on trace elements. Through experiments on CaO adsorbing different concentrations of SO2 gases, conclusions can be drawn that although the product layer introduces extra mass transfer resistance into the sorbent-gas reaction process, the extent of CaO adsorption ability loss due to this factor decreases with decreasing SO2 concentration. When the gas concentration is at trace level, the loss of CaO adsorption ability can be neglected. Subsequent experiments on CaO adsorbing trace SeO2 gas suggest that the sulfate product layer, whether it is thick or thin, has no obvious effect on the CaO ability to adsorb trace SeO2 gas.
机译：二氧化硫（SO2）和微量元素都是燃煤产生的污染物。这项研究涉及在中等温度范围内通过氧化钙（CaO）吸附同时去除硫和痕量二氧化硒（SeO2），特别是硫酸盐产物层对微量元素的传质效果。通过对CaO吸附不同浓度的SO2气体的实验，可以得出结论，尽管产物层在吸附剂-气体反应过程中引入了额外的传质阻力，但由于该因素导致的CaO吸附能力损失的程度随SO2浓度的降低而降低。当气体浓度处于痕量水平时，可以忽略CaO吸附能力的损失。随后对CaO吸附痕量SeO2气体的实验表明，无论硫酸盐产物层厚还是薄，对CaO吸附痕量SeO2气体的能力均无明显影响。

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