To study the explosiveness of biomass fuels,TG-DTG thermogravimetric analysis was used to analyze the combus-tion performance and kinetic parameters of several common biomass fuels(straw,sawdust,peanut shells)and their mixtures.The microstructures of these fuels were analyzed using scanning electron microscopy(SEM).Additionally,an elemental analysis of the wood powder and peanut shell powder mixture was carried out using an elemental analyzer.Based on the elemental composition,the amount of oxygen required for its oxidation reaction was calculated,and an explosion test was subsequently conducted.The results showed that the mixed fuel(wood powder and peanut shell powder in a 1∶1 mass ratio)exhibited high stable combustion characteristics,flammability index,and overall combustion performance.The activation energy was moderate,and the surface appeared porous and rough,with more free surfaces and a larger specific surface area,which facili-tated combustion.In an experiment,40g of this mixed fuel was loaded into a steel pipe with a diameter of 40 mm,a length of 200 mm,and a wall thickness of 1.5 mm,and filled with 5 MPa oxygen.The mixture was successfully detonated by a No.8 e-lectronic detonator without producing toxic gases.The steel pipe was blasted into fragments of different sizes,with most frag-ments measuring less than 50 mm.The research results indicate that biomass fuel can exhibit explosiveness under certain condi-tions.
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