Name : The 46th Conference of Coal Science
Number : 46
Location : [in Japanese]
Date : November 26, 2009 - November 27, 2009
Pages 72-73
The combustion characteristics of Datong coal in the different N_2/O_2/CO_2 environments have been extensively studied by using thermo-gravimetric technique. The coal pyrolysis in CO_2 environment can be divided into three stages: moisture release, devolatilization and char gasification by CO_2 at higher temperature zone. At each temperature zone, the mass loss rate of coal pyrolysis in CO_2 environment is higher than that in N_2 environment. At different heating rates the values of the Arrhenius activation energy (E) and pre-exponentional factor (A) were estimated from the TGA data by applying different methods such as Freeman-Carroll, Doyle and Coats-Redfern. A trend of decrease of activation energy values were observed with the increase of different heating rates.
