Analysis of Factors Affecting the Production of PAHs in Coking Process

In this study simulation preparation of coke had been performed in a laboratory oven with single coal,and coal blending as raw material,respectively,and then collect and detect PAHs produced during the coking process,in order to investigate the effects of coking temperature,coking process and coal adhesion,ash and moisture on the emission of polycyclic aromatic hydrocarbons （PAHs） during coking.The results show that Coking temperature of 700~920 ℃ can generate the highest PAHs emissions.It is found out that coking characteristics,coal tar and pyrolysis products and other factors have great impact on the initial production of polycyclic aromatic hydrocarbons i,and low-emission PAHs produce more emissions.The PAHs emissions increase with the increase of coal adhesion and ash content,while they decrease firstly and then increase with the increase in water content.