油茶壳热解的TG-FT-IR分析及动力学研究  

TG-FT-IR Analysis and Kinetics Study of Camellia Shell Pyrolysis

作　　者：顾洁[1] 刘斌[2] 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,江苏南京210037 [2]南京林业大学化学工程学院,江苏南京210037

出　　处：《生物质化学工程》2015年第4期7-13,共7页Biomass Chemical 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);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：采用热重红外联用(TG-FT-IR)技术考察了油茶壳的热解规律,并选择2种无机制函数积分法Kissinger-AkahiraSunose(KAS)法和Flynn-Wall-Ozawa(FWO)法探讨油茶壳热解动力学。结果表明:油茶壳的热解过程可分为4个阶段:脱水、半纤维素热解、纤维素热解和木质素的二次热解。热解挥发分主要有H2O、CO2、CO和CH4,以及一些醛类、酸类、酮类有机物,且热解温度不同各组分的含量不同。KAS法和FWO法计算出的油茶壳热解活化能基本一致,均随着转化率的增大而增加。Pyrolysis of camellia shell was studied by using thermogravimetric analyzer coupled with Fourier transform infrared spectroscopy（ TG-FY-IR）. The activation energies of camellia shell pyrolysis depending on the conversion rate were calculated by two Model-free methods, namely Kissinger-Akahira-Sunose （ KAS ） and Flynn-Wall-Ozawa （ FWO ）, respectively. The results indicated that the pyrolysis process of camellia shell was divided into four stages, i. e. , dehydration, decomposition of hemieellulose,decomposition of cellulose and the secondary degradation of lignin. The main components of volatiles were H2 O, CO2, CO, and CH4 , along with kinds of organics, such as aldehydes, acids and ketones. The content of each component at different pyrolysis temperatures was different. The activation energies of camellia shell pyrolysis estimated by KAS and FWO were similar. They rose with the increase of the conversion rate.

关 键 词：油茶壳 热解 TG—FT-IR 动力学 

分 类 号：TS229[轻工技术与工程—粮食、油脂及植物蛋白工程]