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A fluidized bed kinetic model for the fluorination of dissociated zircon
Author(s) -
Moolman Francis Sean,
Heydenrych Michael David
Publication year - 2000
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.5450780612
Subject(s) - fluidized bed , materials science , countercurrent exchange , kinetic energy , chemical engineering , yield (engineering) , porosity , cubic zirconia , thermodynamics , chemistry , composite material , organic chemistry , engineering , ceramic , physics , quantum mechanics
A reaction kinetic model for the fluorination of plasma dissociated zircon (PDZ, or ZrO 2 .SiO 2 ) with hydrogen fluoride was developed. The model uses reaction as rate‐limiting step, with a shrinking core of PDZ in a porous matrix of zirconia (ZrO 2 ). This model was used to develop models for a multi‐stage fluidized bed reactor. These models facilitated the determination and design of an optimally configured multi‐stage fluidized bed reactor for the fluorination of PDZ. It was shown that a combination cross‐/countercurrent multi‐stage fluidized bed reactor could yield significant improvement over the conventional countercur‐rent multi‐stage fluidized bed reactor for certain reaction kinetic conditions.