The kinetics of bamboo pyrolysis is essential to understand carbonization of bamboo and effective utilization of bamboo. In this paper, the study on pyrolysis kinetics of bamboo was based on thermogravimetry. Outer, middle and inner parts of bamboo were pyrolyzed in TG equipment (TGA/SDTA851 e) at heating rates of 5, 10, 20, 30 and 40 ℃/min under the temperature range of 40 - 500 ℃ and N_2 atmosphere, respectively. TG results demonstrated that the pyrolysis process of bamboo may be considered as a two-step reaction, one corresponds to the decomposition of hemicellulose and the other to the decomposition of cellulose and lignin. The experimental data were treated by supposing the reaction order of bamboo pyrolysis to be 0.5, 1, 1.5 and 2, respectively. The appropriate reaction order of 1.5 or 2 was obtained by minimizing the difference between the calculated and measured data and the orders of pyrolysis reaction for different bamboo parts are the same at heating rate of 5 to 40 ℃/min. The results showed that the heating rate of pyrolysis process influences the order of pyrolysis reaction, activation energy and frequency factor.
Chemistry & Industry of Forest Products