摘要
以油茶壳为原料,分离提取纤维素、半纤维素和木质素。利用TG-FTIR研究了油茶壳及其三组分在不同升温速率下的热解特性。结果表明:油茶壳及其三组分的热解过程都大致包括干燥、热裂解和炭化3个阶段,随着升温速率的增加,TG/DTG曲线向高温侧移动。热解挥发分主要为H_2O,CO_2,CO和CH_4,以及一些醛类、酸类、酮类、醇类和酚类等有机物。半纤维素对CO_2和CO的产出贡献最大,高温区木质素也产生较多的CO,纤维素的CH_4析出峰强度最高。采用Kissinger法对油茶壳及其三组分热解动力学特性进行研究,计算得到了反应活化能和频率因子。
Cellulose, hemicellulose and lignin were isolated and extracted from camellia shell. Pyrolysis of camellia shell and its three main components at different heating rates were investigated based on thermogravimetric analyzer coupled with Fourier transform infrared spectroscopy （TG-FTIR）. The results indicate that the pyrolysis process of camellia shell and its three main components are divided into three stages named drying, fast degradation and slow degradation. With the increase of heating rate, the TG/DTG curves move toward the side of higher temperature region. The main components of volatiles are H2O, CO2, CO and CH4, along with kinds of organics, such as aldehydes, acids, ketones, alcohols and phenols. Hemicellulose decomposition yields the highest CO2 and CO, and lignin produces more CO in high temperature region. However, most of the CH4 yield is due to cellulose decomposition. The kinetic parameters such as activation energy and frequency factor were calculated by Kissinger method.
出处
《林产工业》
北大核心
2015年第9期9-13,25,共6页
China Forest Products Industry
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)
