采用活性炭吸附/微波加热还原分解法脱除 NO 的实验研究。

Experimental study on removal of NO using adsorption of activated carbon/reduction decomposition of microwave heating.

机构信息

School of Environment, North China Electric Power University, Baoding, China.

出版信息

Environ Technol. 2012 Jul-Aug;33(13-15):1811-7. doi: 10.1080/09593330.2011.646318.

DOI:10.1080/09593330.2011.646318

Abstract

Experimental studies were carried out on flue gas denitrification using activated carbon irradiated by microwave. The effects of microwave irradiation power (reaction temperature), the flow rate of flue gas, the concentration of NO and the flue gas coexisting compositions on the adsorption property of activated carbon and denitrification efficiency were investigated. The results show that: the higher of microwave power, the higher of denitrification efficiency; denitrification efficiency would be greater than 99% and adsorption capacity of NO is relatively stable after seven times regeneration if the microwave power is more than 420 W; adsorption capacity of NO in activated carbon bed is 33.24 mg/g when the space velocity reaches 980 per hour; adsorption capacity declines with increasing of the flow rate of flue gas; the change in denitrification efficiency is not obvious with increasing oxygen content in the flue gas; and the maximum adsorption capacity of NO was observed when moisture in flue gas was about 5.88%. However, the removal efficiency of NO reduces with increasing moisture, and adsorption capacity and removal efficiency of NO reduce with increasing of SO2 concentration in the flue gas.

摘要

采用微波辐照活性炭对烟气进行脱硝的实验研究。考察了微波辐照功率（反应温度）、烟气流量、NO 浓度以及烟气共存成分对活性炭吸附性能和脱硝效率的影响。结果表明：微波功率越高，脱硝效率越高；当微波功率大于 420 W 时，经过 7 次再生后脱硝效率大于 99%，NO 的吸附容量相对稳定；当空速达到 980 时，活性炭床层对 NO 的吸附容量为 33.24mg/g；随着烟气流量的增加，吸附容量逐渐下降；烟气中氧含量增加时，脱硝效率变化不明显；当烟气中的水分约为 5.88%时，NO 的最大吸附容量最大。然而，随着水分的增加，NO 的去除效率降低，并且随着烟气中 SO2 浓度的增加，NO 的吸附容量和去除效率降低。