Abstract
Two bituminous coals, mined in the same coalfield. and coal density fractions were burnt to investigate the impacts of the inherent calcium-based compounds on their PM_<10> emissions. The results indicate the obvious influence of inherent calcium. Combustion of the coal rich in Ca produced less PM_10 than the one lean in Ca. Specifically, the amount of PM_<1-10> having the size ranging from 1.0 to 10 μm, was much low in the case of coal rich in Ca. Effects of included and excluded calcium-based compounds were also elucidated by coal density segregation. The include al-silicates minerals (1〜10μm in diameter) would interact with the excluded calcium-based compounds and agglomerate into larger particles during the raw coal combustion. Accordingly, the amount of PM_<1-10> is reduced greatly.
