Thermogravimetric characteristics of α-cellulose and decomposition kinetics in a micro-tubing reactor

초록

The pyrolysis characteristics and kinetics of alpha-cellulose were investigated using thermogravimetric analyzer (TGA) and micro tubing reactor, respectively. Most of the alpha-cellulose decomposed between 250 and 400 A degrees C at heating rate of 5-20 A degrees C/min. The apparent activation energy was observed in the range of 263.02 kJ mol(-1) to 306.21 kJ mol(-1) at the conversion of 10-80%. The kinetic parameters were determined by nonlinear least-squares regression of the experimental data, assuming first-order kinetics. It was found from the kinetic rate constants that the predominant reaction pathway was A(alpha-cellulose) to B(bio-oil) rather than A(alpha-cellulose) to C(gas; C-1-C-4) and/or to B(bio-oil) to C(gas; C-1-C-4) at temperatures of 340-360 A degrees C.

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