Abstract
The continuous thermal decomposition of solid particles are often carried out in a rotary kiln. Fractional decomposition of a given sample may be estimated upon the appropriate mathematical expressions based on a hypothetical model of the reactor system.
Hereunder is given a brief statement of an iterative and stepwise method which has been adopted in calculation of the overall conversion of the thermal decomposition of lead carbonate particles flowing through a rotary cylinder. In framing the mathematical expressions to estimate the overall conversion of the sample, two items have been taken into consideration, a hypothetical model of the reactor system in which the reactor is assumed as consisting of a number of differential elements on one hand, and on the other, the temperature profile and residence time distribution of the sample in the cylinder. The rate of thermal decomposition obtained by the isothermal batch decomposition runs has also been utilized as data in the present estimation of the fractional decomposition. During the calculation procedure in the present study, the effect of partial pressure of carbon dioxide in the reactor has constantly been taken into account. The experiments were conducted to verify the above mentioned estimation of the overall eonversion of the material. The comparison of the estimated overall conversion of lead carbonate particles in the cylinder with the result of its experiments amply shows that the above mentioned method is an effective approach to the estimation of the said overall conversion. The detailed process of the calculation and estimation will, however, be deferred to a separate paper.
