Characteristics of Inhalable Particulate Matters from Lignite and Bituminous Coal Combustion

Granularity distribution,microstructure,heavy metals and polycyclic aromatic hydrocarbons of inhalable particulate matters from lignite and bituminous coal power plants were studied. Results showed that global particulates were dormant in inhalable particulate matters from different coal combustions. Contents of heavy metals and polycyclic aromatic hydrocarbons increased with reduction of granularity. There were more solid spheres and less porous and hollow spheres in inhalable particulate matters compared with original fly ash particles. Contents of heavy metals from lignite combustion were higher than bituminous coal combustion,with As content from lignite combustion apparently higher than bituminous coal combustion due to As content of lignite higher than bituminous coal. Contents of polycyclic aromatic hydrocarbons from lignite combustion were higher than bituminous coal combustion. Emission content of polycyclic aromatic hydrocarbons has much to do with coal volatile content. The study aimed to provide scientific foundation for source analysis of atmospheric particles,pollution prevention and utilization of inhalable particulate matters.