摘要
用热重分析法对干燥前后花生壳的热解特性进行了研究。分析了干燥前后花生壳样品在升温速率为25℃/m in下的热解特性,得到热重曲线(TG)、微商热重曲线(DTG)和差热曲线(DTA)。发现样品的失重过程由干燥阶段、预炭化阶段、炭化阶段、煅烧阶段4个阶段组成,并对所得曲线进行了详细分析。对比干燥前后花生壳的曲线差异,发现干燥后的花生壳TG/DTG曲线整体左移,热解温度降低。最后对花生壳的热解过程进行了动力学研究。为花生壳的合理利用提供了一定的理论基础。
Pyrolysis characteristics of the peanut shell before and after dryness are studied using thermogravimetric analysis at the heating rale of 25 ℃/min. The curves of TG, DTG and DTA are gotten through the experiments. After the detailed analysis of the curves, it is found that the pyrolysis process can be divided into four stages： the dehydrating phase, the pre-charring phase, the charring phase and the calcining phase, Compared with the curves of the fresh and dried sample, TG/DTG of the dried sam- ple moves to the left as a whole and the pyrolysis temperature is decreased. Kinetics study of the pyrolysis process is carried out at last. All these results supply the theoretical basis for making full use of the peanut shell.
出处
《生物质化学工程》
CAS
2007年第4期31-34,共4页
Biomass Chemical Engineering
基金
重庆市自然科学基金资助项目(CSTC2006BB6223)
关键词
花生壳
热解
热重分析
动力学研究
peanut shell
pyrolysis
thermogravimetric analysis
kinetics study
