The Effect of Residence Time on Biomass Pyrolysis of Several in Different Temperature Nodes

Abstract

The effect of residence time on biomass pyrolysis is discussed in the paper. Firstly, several typical temperature nodes (573, 873, 1073, and 1273K) are selected as the experimental subjects. Then, the residence time is changed in these temperature nodes. Finally, thermo gravimetric analyzer is used to study the pyrolysis and kinetics characteristics of biomass in different experimental conditions. The results show that extension of residence time is not conducive to biomass mass loss and heat release at 523, 873, 1073, and 1273K. In the several temperature condition that the faster heating rate and the shorter residence time, the more weightlessness is and the phenomenon is more obvious in low temperature. With the increase of the residence time, area and value of the second endothermic peak decreases and the value moves to high temperature zone. When the residence time is not the same value, the biomass pyrolysis can still be fitted for two first-order kinetic equations. At the same time, temperature interval length of fitting curve decreases and further leads to E and A increase.