SIMULATION OF DYNAMIC THERMOGRAVIMETRIC CURVES - SINGLE AND COMPLEX-REACTIONS

Dynamic thermogravimetry is a technique widely used to study the kinet ics of reactions involving solids. In this work, the fundamental prope rties which determine the shape and position of the TG and DTG curves are defined, namely the kinetic function and two dimensionless paramet ers gamma = E/RT0 and beta = AT0/b. The methodology used is extended t o the case of complex reactions (competitive, consecutive and independ ent), referring to situations which may occur in practice and showing illustrative simulations. The pyrolysis of lignocellulosic materials i s taken as an example, using data previously published.