摘要
采用非等温热重分析技术，考察了杜松、黄玫瑰、红皮云杉和暴马丁香等4种木质类生物质在30～800℃温度区间内的热解特性（N2气氛下）以及升温速率（10、20、40和60℃·min^-1）对热解过程的影响。实验结果表明，木质类生物质的非等温失重过程主要由失水、剧烈失重和缓慢失重三个阶段组成。主要失重温度范围为249～428℃，其中挥发分的初析温度（Ts）为249～308℃；微分热失重（DTG）的峰值温度（Tmax）在349～408℃之间；最大失重速率（Wmax）为458．8～2700ug·min^-1。木质类生物质热解活化能（E）为43．51～52．48kJ·mol^-1，指前因子（A）为1．3×10^2～3．6×10^5min^-1。随升温速率（β）的增加，E增大，Ts和Tmax升高，Wmax提高。
The pyrolytic decomposition studies of four species of lignocellulosic biomass （hackmatack, rugosa, spruce and clove） were carried out by thermogravimetric analysis （TGA） under the temperature range from 30 to 800℃ in the N2 atmosphere at four heating rates （/3） of 10,20,40 and 60℃· min^-1. The non -isothermal weight loss process of the above biomass samples was mainly composed of dehydration, rapid weight loss and slow weight loss, with the main pyrolysis reaction occurring in the temperature scope of 249～ 428 ℃. The temperatures for the initialization of volatiles （ Ti ） and peak weight loss temperature （ Tmax ） were between 249 ～308℃ and 349 ～ 408℃, respectively. Peak weight loss rate （ Wmax ） was in the scope of 458.8 ～ 2700 ug·min^-1 The apparent activation energy （E） and pre -exponential factor （A） were between 43.51 ～ 52.48kJ ·mol^-1 and 1.3×10^2 ～3.6 ×10^5min^- 1, respectively. It was shown that E, Ts, Tmax and Wmax got higher with the increase of β.
出处
《黑龙江大学自然科学学报》
CAS
北大核心
2008年第1期85-89,94,共6页
Journal of Natural Science of Heilongjiang University
关键词
木质类生物质
热解
热重分析
动力学
升温速率
lignocellulosic biomass
pyrolysis
thermogravimetric analysis
kinetics
heating rates
