KINETIC-STUDY ON BIOMASS GASIFICATION (A 1991 ISES SOLAR WORLD CONGRESS HONORS PAPER)

An experimental apparatus, with the features of fast heating rate and continuous record of reaction parameters, was developed to study kinetics of fast pyrolysis. The temperature effects, at a range of 400-degrees-C to 900-degrees-C, on pyrolysis rate, products profile, gas quality and quantity, and so on, were studied and the results are listed and analyzed. The effect of secondary reaction of gas phase at 700-degrees-C was tested and the regression result is expressed in an experimental formula. Based on the experimental results, the three-stage-reaction mechanism module is suggested. The kinetic expression to calculate gas formation rate is concluded as: d-alpha/dt = A exp(-E/RT)(1 - alpha)n. The kinetic parameters of A, E, and n at different temperatures are given in this paper