Abstract: Pyrolysis characteristics of the peanut shell before and after dryness are studied using thermogravimetric analysis at the heating rate 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 sample 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.

Key words: peanut shell, pyrolysis, thermogravimetric analysis, kinetics study