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Mathematical modeling of polyethylene terephthalate pyrolysis in a spouted bed
Author(s) -
Niksiar Arezou,
Faramarzi Amir Hasan,
Sohrabi Morteza
Publication year - 2015
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14775
Subject(s) - polyethylene terephthalate , pyrolysis , materials science , mass transfer , inert , kinetic energy , polyethylene , thermodynamics , particle (ecology) , chemical engineering , heat transfer , range (aeronautics) , mechanics , chemistry , composite material , organic chemistry , physics , engineering , quantum mechanics , geology , oceanography
A model has been developed for pyrolysis of polyethylene terephthalate (PET) in a spouted bed reactor based on the conservation equations for heat, mass, and momentum transports. A spouted bed has been constructed and the kinetic parameters have been obtained within the temperature range of 723–833 K, using two particle size ranges, (0.1–1.0) × 10 −3 and (1.0–3.0) × 10 −3 m. The model' predictions for the radial distributions of temperature and concentration confirm the excellent mixing of particles. Thus, spouted beds are appropriate equipments for performing kinetic studies of PET pyrolysis. The inlet gas temperature and the mass of PET highly affect PET conversion. The amount of inert particles has a negligible effect on the conversion and it can be reduced as far as a stable spouting is preserved. The gas flow suffices to eliminate the external heat and mass‐transfer limitations. It can be reduced to the minimum value to decrease the energy consumption. © 2015 American Institute of Chemical Engineers AIChE J , 61: 1900–1911, 2015