Thermogravimetric experiment and kinetic study on the combustion characteristics of wheat straw
XU Ju
PENG Jinxing
CHEN Junwen
LI Haipeng
XU Yatai
JI Yi
LIU Xinyuan
BAO Zhenbo
Abstract：The thermogravimetric analysis method is adopted to conduct experimental analysis and thermodynamic research on the thermogravimetric characteristics of wheat straw at three heating rates of 10℃/min,20℃/min and 30℃/min.The results show that the pyrolysis and combustion process of wheat straw presents five stages:water loss and drying,energy accumulation,rapid pyrolysis,slow combustion and complete combustion.The ignition temperature(Te)of wheat straw is between 274 and 279℃,the combustion stability discrimination index(Rw)is 0.37～1.58 mg/(min·℃2),and the volatile analysis characteristic index(Rv)is 6.39×10-5～15.40×10-5 mg/(min·℃2).The comprehensive combustion characteristic index(P)is 1.84×10-9～11.04×10-9 mg2/(min2·℃3).The weight loss is mainly concentrated in the rapid pyrolysis and slow combustion stages.Analyzed by the Coats-Redfern method,the reaction orders of the two stages are 2.0 and 0.5 respectively,and the average activation energies(E)are 68.1 kJ/mol and 6.6 kJ/mol respectively.
Keywords：dynamicsbiomasswheat strawcombustion characteristic
Publication Date：2025-06-25
Online Publishing Date：2025-09-01(First online date of this platform, not the publication date of the document)
Pages：4( 46-49 )