Abstract: In the nitrogen atmosphere， simultaneous thermogravimetric-mass spectrometry(TG/MS) was used to study the pyrolysis behavior of peanut shell at different heating rates (5， 10 and 20℃/min)， and with the change of temperature and heating rates， the release rule of small molecule gas (CO₂， CH₄， H₂， CO) product was obtained by mass spectrometry analysis. Results showed that four stages appeared during pyrolysis process of peanut shell. Moreover， the greater the heating rate， the wider the weightlessness temperature range， and the steeper the maximum pyrolysis rate peak. The activation energy of peanut shell under different weight loss rates (0.2~0.8) ranged in 57.3~88.6kJ/mol by Flynn-Wall-Ozawa method. With Achar differential method and the Coats-Redfern integral method， it could be determined that pyrolysis process of peanut shell accords with the Jander equation after calculating 30 kinds of common mechanism function one by one， the reaction mechanism was three-dimensional uniformly spherical diffusion control. The reaction order was 2.

Key words: peanut shell, pyrolysis, thermogravimetric-mass spectrometry, kinetics analysis