Industrial & Engineering Chemistry Research, Vol.35, No.10, 3347-3355, 1996
Transient-Behavior of a Coconut Shell Pyrolyzer - A Mathematical-Analysis
A mathematical model based on the mechanistic approach to the reaction kinetics of pyrolysis reactions and the realistic analysis of the interaction between simultaneous heat and mass transfer along with the chemical reaction has been developed for the design of smoothly running pyrolyzers. The model of a fixed-bed pyrolysis reactor has been proposed on the basis of the dimensionless parameters with respect to time and radial position. The variation of physical parameters like bed voidage, heat capacity, diffusivity, density, thermal conductivity, etc., on temperature and conversion has been taken into account. A deactivation model has also been incorporated to explain the behavior of pyrolysis reactions at temperaures above 673 K. The simulated results of the model have been explained by comparing them with the experimental results.
Keywords:LIGNOCELLULOSIC MATERIALS;TEMPERATURE PYROLYSIS;PRODUCT COMPOSITIONS;FLASH PYROLYSIS;CYCLONE REACTOR;RAPID PYROLYSIS;WOOD PYROLYSIS;HEAT-TRANSFER;KINETICS;CELLULOSE