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dc.contributor.authorChodak, Jillianen_US
dc.date.accessioned2014-03-14T20:37:23Z
dc.date.available2014-03-14T20:37:23Z
dc.date.issued2010-05-05en_US
dc.identifier.otheretd-05172010-091509en_US
dc.identifier.urihttp://hdl.handle.net/10919/32920
dc.description.abstractInterest in non-traditional fuel sources, carbon dioxide sequestration, and cleaner combustion has brought attention on gasification to supplement fossil fueled energy, particularly by a fluidized bed. Developing tools and methods to predict operation and performance of gasifiers will lead to more efficient gasifier designs. This research investigates bed fluidization and particle decomposition for fluidized materials. Experimental methods were developed to model gravimetric and energetic response of thermally decomposing materials. Gravimetric, heat flow, and specific heat data were obtained from a simultaneous thermogravimetric analyzer (DSC/TGA). A method was developed to combine data in an energy balance and determine an optimized heat of decomposition value. This method was effective for modeling simple reactions but not for complex decomposition. Advanced method was developed to model mass loss using kinetic reactions. Kinetic models were expanded to multiple reactions, and an approach was developed to identify suitable multiple reaction mechanisms. A refinement method for improving the fit of kinetic parameters was developed. Multiple reactions were combined with the energy balance, and heats of decomposition determined for each reaction. From this research, this methodology can be extended to describe more complex thermal decomposition. Effects of particle density and diameter on the minimum fluidization velocity were investigated, and results compared to empirical models. Effects of bed mass on pressure drop through fluidized beds were studied. A method was developed to predict hydrodynamic response of binary beds from the response of each particle type and mass. Resulting pressure drops of binary mixtures resembled behavior superposition for individual particles.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartChodak_J_T_2010.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectparticle characterizationen_US
dc.subjectPyrolysisen_US
dc.subjectpartial bed loadingen_US
dc.subjectbinary mixturesen_US
dc.subjectlab-scale fluidized beden_US
dc.subjectreaction energeticsen_US
dc.subjectreaction kineticsen_US
dc.subjectheat of decompositionen_US
dc.titlePyrolysis and Hydrodynamics of Fluidized Bed Mediaen_US
dc.typeThesisen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMechanical Engineeringen_US
dc.contributor.committeechairLattimer, Brian Y.en_US
dc.contributor.committeememberVandsburger, Urien_US
dc.contributor.committeememberBattaglia, Francineen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05172010-091509/en_US
dc.date.sdate2010-05-17en_US
dc.date.rdate2010-06-02
dc.date.adate2010-06-02en_US


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