Effect of Inorganic Salts on Pyrolysis of Wood, alpha-Cellulose, and Lignin Determined by Dynamic Thermogravimetry

摘要

Dynamic thermogravimetric analyses were conducted under vacuum on pyrolysis of wood, of alpha-cellulose, and of lignin, untreated and treated with 2 percent by weight of five inorganic salts. Data for weight loss and for rate of weight loss were obtained to indicate the principal decomposition ranges for the wood and the wood components, the effect of the chemicals on volatilization at various temperature ranges, and the kinetics of the decomposition reactions. The difference method of Freeman and Carroll was first examined as a means for obtaining the order of the reactions, the frequency factors, and the activation energies. However, because of amplified errors in this method, a pseudo first-order Arrhenius plot was finally used for determining frequency factors and activation energies. (Author)