生物质热解过程两种动力学分析方法的比较

利用Coats-Redfern法和Starink等转化率法对松球和玉米芯两种生物质的热解过程进行动力学分析.Coats-Redfern法需事先假设或筛选动力学模型，采用Malek法对动力学模型进行了筛选，松球、玉米芯热解过程分别符合D3，R2模型.Starink等转化率法不需模型假设即可进行动力学求解，求得的活化能比由Coats-Redfern法求得的活化能高.由Starink等转化率法求得玉米芯的活化能在整个热解过程中变化较小，可以用单一机理函数描述，而松球的活化能在整个热解过程中变化较大，不可以用单一机理函数描述.

Comparison of Two Kinetic Analysis Methods for Biomass Pyrolysis Processes

Kinetic analysis of pyrolysis processes of pine cone and corn cob was carried out with Coats Redfern method and Starink iso conversional method. Coats Redfern method needed the assumption or sifting of the kinetic model， and therefore this paper used Malek method to sift from 10 common kinetic models. The pyrolysis processes of pine cone and corn cob fitted D3 and R2 models， respectively. Starink iso conversional method didn’t need the model assumption， and the activation energy obtained by this method was higher than that by Coats Redfern method. With Starink iso conversional method， the activation energy of corn cob obtained rarely changed in the whole pyrolysis process， indicating its pyrolysis process can be described by the simple kinetic model， while the activation energy of pine cone was opposite to that of corn cob.