Oil sludge (OS) is an organic solid waste in the petrochemical industry and
improper treatment of OS will cause environmental pollution. Pyrolysis is an
effective way to realize its resource reuse. In order to understand the
pyrolysis behavior and thermodynamic characteristics of OS, four OS samples
from storage tanks were used as the research object, and pyrolysis
experiments were carried out at heating rates of 5, 10, and 15?/min under a
nitrogen atmosphere. The kinetic parameters of pyrolysis of OS are
calculated by three equal conversion methods (Friedman method (FR),
Flynn-Wall-Ozawa method (FWO) and Distributed activation energy model
(DAEM)), and the most possible thermodynamic models for the main pyrolysis
phase were analyzed and discussed by introducing the Malek method. The
results show: High heating rate can promote the pyrolysis of OS; In the
pyrolysis stage, the apparent activation energy increases with the increase
of the conversion rate. The apparent activation energy calculated by the FR
method is more reliable. The average apparent activation energies of the
four OS are 221.23, 84.71, 94.67 and 116.56 kJ/mol, respectively. The
apparent activation energy and the pre-exponential factor are positively
correlated, indicating that there is a kinetic compensation effect in the
pyrolysis process. The thermodynamic models of the four OS samples are all
three-dimensional diffusion models, but their integral functions are
different. The research results can provide theoretical support for the
industrialization, harmlessness and resource utilization of OS pyrolysis.
Kinetic Compensation Effect In The Thermal Decomposition Of Biomass In Air Atmosphere
