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Measurement of the axial dispersion coefficient of cohesive powders in rotary kilns
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Paredes, Ingrid Joylyn. Measurement of the axial dispersion coefficient of cohesive powders in rotary kilns. Retrieved from https://doi.org/doi:10.7282/T3Q81G7P

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TitleMeasurement of the axial dispersion coefficient of cohesive powders in rotary kilns
NameParedes, Ingrid Joylyn (author); Glasser, Benjamin J (chair); Celik, Fuat (internal member); Buettner, Helen (internal member); Rutgers University; Graduate School - New Brunswick
Date Created2016
Other Date2016-05 (degree)
SubjectChemical and Biochemical Engineering, Particles, Kilns, Rotary
Extent1 online resource (vii, 31 p. : ill.)
DescriptionWhile continuous rotary calcination is a widely used thermal treatment in large-scale catalyst manufacturing, fundamental understanding of the process is absent from scientific literature. Thus, the goal of this research is to improve fundamental understanding of rotary calcination processes to aid in scale-up. For successful calcination to occur, the residence time of the particles must exceed the time required for heating and calcination. The optimal residence time therefore depends on both of these competing time scales, which are functions of feed material properties, kiln geometry and kiln operating conditions. For uniform treatment of the feed, the particles must also exhibit low axial dispersion. In this work, the residence time distribution and axial dispersion coefficient for two cohesive fluid cracking catalyst powders were measured in pilot plant kilns using a tracer study developed by Danckwerts. Results were successfully matched to the Taylor fit of the axial dispersion model and the Sullivan prediction for mean residence time. It was found that an increase in feed rate, kiln incline and rotary speed decreased mean residence time and overall dispersion. The axial dispersion coefficient was found to vary with kiln conditions. Such results have not been previously reported for the cohesive powders such as the ones used in our work.  
NoteM.S.
NoteIncludes bibliographical references
Noteby Ingrid Joylyn Paredes
Genretheses, ETD graduate
Persistent URLhttps://doi.org/doi:10.7282/T3Q81G7P
Languageeng
CollectionGraduate School - New Brunswick Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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