The combustion characteristics of semi coke are studied by using thermogravimetric analysis.The effects of particle size,four combustion aids(MnO2,Fe2 O3,sodium citrate,Ca(OH)2),and w(sodium citrate)on the combustion characteristics of semi coke are examined.The results indicate that reducing the particle size of semi coke helps to improve its combustion characteristics.Sodium citrate can effectively reduce the ignition temperature of semi coke and the burnout temperature of 50％organic matter.Its ignition temperature has decreased from 461.9 ℃ to 409.5 ℃,and the burnout temperature of 50％organic matter has decreased from 626.3 ℃ to 584.9 ℃.When w(sodium citrate)is less than 3.0％,the ignition temperature and 50％organic matter burnout temperature of semi coke decrease significantly,and its combustion rate remains basically unchanged.However,as w(sodium citrate)increases,the characteristic temperatures of semi coke decrease slowly,and its combustion rate decreases significantly.This indicates that adding sodium citrate in an appropriate amount is beneficial for improving the combustion characteristics of semi coke.
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