Experimental study on combustion characteristics of biomass char

To improve the utilization ratio of biomass straw,taking wheat straw and corn straw as research objects,wheat straw and maize straw char were prepared under 400 ℃ and 450 ℃ respectively,TG-DTA thermal analysis technology was applied to investigate the influence of heating rate and combustion atmosphere on combustion characteristics of the char,then obtained the reaction kinetics equation.The frequency factor and activation energy under different conditions were calculated.The results show that,activation energy is hardly affected by heating rate or combustion atmosphere.On the contrary,heating rate and combustion atmosphere have a profound impact on frequency factor.The higher oxygen concentration,the greater the frequency factor,the faster heating rate,the greater frequency factor.