Application of a particle model to pyrolysis. Comparison of different feedstock: Plastic, tyre, coal and biomass

The thermal behaviour of solid particles of plastic, tyre, coal and biomass as feedstock in pyrolysis processes was studied. The samples were pyrolyzed in a thermogravimetric analyzer in nitrogen atmosphere (surface flow rate 2.65·10−3m/s) at two different heating rates (5 and 10°C/min) with tempera...

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Bibliographic Details
Published in:Fuel processing technology 2012-11, Vol.103, p.1-8
Main Authors: Navarro, M. Victoria, Martínez, Juan D., Murillo, Ramón, García, Tomás, López, José M., Callén, M. Soledad, Mastral, Ana M.
Format: Article
Language:English
Subjects:
algorithms
Applied sciences
Biomass
Coal
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Feedstock
feedstocks
Fuels
Heat transfer
heat transfer coefficient
Mathematical models
Natural energy
nitrogen
overland flow
Particle kinetics
Particle size
physicochemical properties
Plastic
plastics
Pyrolysis
rubber
temperature profiles
Theoretical studies. Data and constants. Metering
thermogravimetry
Tires
Tyre
Tyres
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Summary:The thermal behaviour of solid particles of plastic, tyre, coal and biomass as feedstock in pyrolysis processes was studied. The samples were pyrolyzed in a thermogravimetric analyzer in nitrogen atmosphere (surface flow rate 2.65·10−3m/s) at two different heating rates (5 and 10°C/min) with temperatures ranging from 150 to 950°C. This paper shows the successful application of the distributed energy model to study the effects of dynamic experiments on the solid pyrolysis, in particular, to ABS plastic and tyre rubber for the first time. In addition, the reaction model algorithm used was successfully implemented together with a heat transfer model to predict temperature profiles in the particle and to explore the effects of both solid characteristics and process conditions on the pyrolysis. Within the process conditions studied (particle size, inlet feedstock temperature, reactor temperature and global heat transfer coefficient) the particle size was the most influencing one. From the solid characteristics, the main influence in the particle behaviour was attributed to the characteristic devolatilisation obtained in thermobalance showing the physicochemical properties a weak influence on it. ► A DAEM algorithm was successfully implemented in a particle heat transfer module. ► Devolatilisation of ABS plastic and tyre rubber was first time studied with DAEM. ► Most influencing variables are the particle size and the reactor. ► Intrinsic devolatilisation characteristics strongly affects the conversion time.
ISSN:0378-3820
1873-7188
DOI:10.1016/j.fuproc.2011.12.031