油茶壳热解过程及atava-esták法动力学模型的研究  

Research on Pyrolysis Process and Kinetics of Camellia Shell Using atava-esták Method

作　　者：顾洁[1] 刘斌[2] 王恋[1] 张齐生[1] 周建斌[1] 

机构地区：[1]南京林业大学材料科学与工程学院,南京210037 [2]南京林业大学材料科学与工程学院化学工程学院,南京210037

出　　处：《科学技术与工程》2015年第11期36-41,共6页Science Technology and Engineering

基　　金：林业公益性行业科研专项项目(201304611);林业科学技术推广[2014]40号;江苏高校优势学科建设工程项目(PAPD)资助

摘　　要：利用热重分析法在氮气气氛和不同升温速率下对油茶壳的热失重行为进行了研究。根据热重实验数据,采用atava-esták法,选取30种不同形式的动力学机理函数,并结合Ozawa积分法和Kissinger微分法的计算结果,筛选出最合适的动力学参数。结果表明:油茶壳的失重过程分为干燥、热裂解和炭化三个阶段。油茶壳在不同升温速率条件下的热解行为,热解机理符合Avrami-Erofeev方程(随机成核和随后生长),积分形式为[-ln(1-α)]3,平均活化能为79.59 k J·mol-1。Thermogravimetric analysis was used to study the pyrolysis characteristics of camellia shell, at different heating rates of （10.0, 20.0, 30.0, 40. 0, 50. 0） ℃ · min^-1 in a stream of N2. According to the thermogravimetric experiment data, thirty kinds of reaction mechanism functions were adopted to analysis the kinetics of pyrolysis process of camellia shell using Satava-Sest（tk method. The most suitable kinetic parameters were selected combined with the calculation results of Ozawa and Kissinger method. The results showed that the pyrolysis process of camellia shell was divided into three stages： drying, fast degradation and slow degradation. The Avrami-Erofeev equation was the most reasonable model for camellia shell pyrolysis at different heating rates, which indicated that the pyrolysis mechanism of camellia shell was random nucleation and subsequent growth. The integral form was [ - In （ 1 - or） ] 3 and the average activation energy was 79.59 kJ · mol ^- 1.

关 键 词：热解 油茶壳 动力学 

分 类 号：S216.2[农业科学—农业机械化工程] O643.1[农业科学—农业工程]