The combustion experiments of coal sludge chars produced at different pyrolysis temperatures were carried out through thermogravimetric-mass spectrometry(TG-MS). The coal sludge chars' combustion characteristics and the emission characteristics of NH_3

NO

SO_2 and CO_2 at different pyrolysis temperatures were studied. Moreover

the C-R method was employed to calculate the coal sludge chars' activation energies and pre-exponential factors. The results show that

the pyrolysis temperature had great influence on combustion performance of the sludge chars. The flammability index

combustion stability index and comprehensive combustion characteristic parameters of the sludge chars decreased with the increasing pyrolysis temperature. The pyrolysis temperature had a certain influence on precipitation characteristics of NH_3

NO

SO_2 and CO_2. The relative precipitation accumulation of these gases decreased with the increasing pyrolysis temperature. The activation energy of the sludge char increased obviously with the pyrolysis temperature

and kinetic compensation effect exists in the coal sludge char's combustion process.