THE CYCLONE, A REACTOR FOR SUBLIMATION - SUBLIMATION OF ISOCYANURIC ACID

The purpose of the present paper is the experimental and theoretical s tudy of the behaviour of the cyclone for carrying out the fast sublima tion of solid particles. The experiments are performed with isocyanuri c acid that sublimes at 633 K. They show that the phase change may rea ch 99% efficiency in less than 1 s for particles smaller than 80 mu m and for wall temperatures higher than 1000 K. A first model using the heating and sublimation times of the solids and taking into account th eir initial size distribution gives results in a good agreement with e xperiments. It is possible in a second model to gather all the experim ental results by using a unique particle size, the process then being characterized by sublimation and heat exchange time constants.