烟气中多环芳烃吸附脱除的研究

针对热电厂烟气中排放的多环芳烃（PAHs）污染物，在实验室规模上研究了六种吸附剂对烟气中典型的PAHs, 如萘（Nap）、芴（Flu）、菲（Phe）的吸附脱除行为。考察了吸附剂结构特征与Nap，Flu，Phe高温脱除的相关性，并对煤质活性炭（AC-1）在160 ℃～200 ℃下的吸附等温线进行了研究。结果表明，吸附剂对PAHs的吸附能力与其结构参数中BET表面积和微孔体积具有紧密相关性，而与中孔体积没有明显关系；活性炭表现出很好的脱除烟气中PAHs的作用；吸附剂对PAHs的吸附能力随着PAHs的质量分数增大而增大，随吸附温度的增加而减小；随着PAHs的碳原子数和芳环数增加，其在吸附剂上的吸附能力也增强。

Polycyclic aromatic hydrocarbons removal from hot gas by porous sorbent adsorption

The aim of this paper is to remove the polycyclic aromatic hydrocarbons (PAHs) from hot gas during coal combustion. The adsorption for PAHs including Napthalenene (Nap), Fluorene(Flu) and Phenanthrene(Phe) with six sorbents was investigared. The effect of the textural properties of sorbents and isothermal adsorption behavior of a coal-based active carbon were examined in details. It can be concluded that the BET surface area and micro pore volume of sorbent are the determinant parameters for the PAHs removal. Furthermore, no obvious relationship is found between mesopore volume of sorbent and PAHs adsorption capacity. The adsorption capacity of sorbent is enhanced with increasing PAHs concentration and temperature. The adsorption amount of three PAHs on active carbon increases with their carbon numbers and aromatic ring numbers. The lower the PAHs volatility is, the higher the adsorption amount is.