Abstract:The customized thermogravimetric analysis system was used to conduct isothermal combustion experiment on the coke powder and straw blended fuels.The combustion characteristics of coke powder and straw at 800,900 and 1 000℃ were studied when the mixing ratio of coke powder and straw was 90∶10,85∶15,80∶20,75∶25 and 70∶30,respectively.And the reaction kinetics parameters of briquette fuel were calculated by isothermal method.The results show that increasing of temperature and straw mixing ratio can improve the burning rate and shorten the burnout time.The reaction order of the 5 kinds of briquette fuels burning at a constant temperature varies between 0.9 and 2.Both the activation energy and the pre-exponential factor decrease with the increase of the blending ratio of the straw.When the ratio increases from 25% to 30%,there will be a sudden change in both of them,which is greatly reduced.