【摘要】 用热重分析方法研究了玉米全秸秆、秸皮和玉米叶的热解失重过程和热解特性。结果表明:3种原料的热解过程相似,分为预热解、主热解和碳化3个阶段,且均在340℃左右达到最大失重速率;玉米全秸秆的热解特征指数最大,挥发分析出特性最好,其次是秸皮和玉米叶;采用不同反应级数n进行动力学拟合发现:n=2时的热解动力学拟合效果较n=1好,同时玉米全秸秆的动力学参数均最大,玉米叶最小,即全秸秆需要最多的热量才可以热解,但开始热解后其热解过程也相对更容易进行。更多还原

【Abstract】 Study the pyrolysis process and kinetics of the corn stalk,corn skin and corn leaf by TG-DTG analysis.The results show that:the pyrolysis processes of the 3 raw materials are similar,divided into preheating,the main pyrolysis and carbonization three stages,and at about 340℃ to achieve the maximum weight loss rata;the corn stalk’s pyrolysis characteristic is the largest,devolatilization characteristics is best,followed by corn skin and corn leaf;Dynamics fitting use different reaction order found:compared with n=1,the fitting results of n=2 is better,while the pyrolysis dynamics parameters of the corn stalk are largest,corn leaves minimum,that the corn stalk needs the most heat before pyrolysis,but the pyrolysis process is easier after pyrolysis began.更多还原