烟气中多环芳烃吸附脱除的研究

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.