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Simulation and Modeling of Vegetable Market Wastes Pyrolysis Under Progressive Deactivation Condition
Author(s) -
Ray Ruby,
Bhattacharya Pinaki,
Chowdhury Ranjana
Publication year - 2004
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450820317
Subject(s) - pyrolysis , char , biomass (ecology) , inert gas , materials science , inert , homogeneous , chemical engineering , thermodynamics , kinetic energy , reaction rate constant , chemistry , kinetics , composite material , organic chemistry , physics , engineering , oceanography , quantum mechanics , geology
The pyrolysis behaviour of predried vegetable market waste has been investigated using TGA within the temperature range 523 to 923 K under inert atmosphere and a comparison has been made with other lignocellulosic materials in order to point out the difference between the pyrolysis of nearly homogeneous and perfectly mixed heterogeneous biomass. Kinetic parameters of the pyrolysis material have been evaluated from the simulation of the TG data. A reaction mechanism involving two parallel 1 st order reactions evolving gaseous products lumped as volatiles and solid products lumped as char has been proposed for prediction of rate constants as a function of normalized fractional change. Four kinetic models incorporating the effect of deactivation have been used for this purpose. In another attempt, using concentration independent model of solid deactivation, simulation has been carried out to predict concentration time history of the system components as well as quantitative change of rate constants with the propagation of time.