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Evaluation of the effect of extrusion velocity and paste water content on the microstructural variability and green strength of extruded titanium dioxide

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Title
Evaluation of the effect of extrusion velocity and paste water content on the microstructural variability and green strength of extruded titanium dioxide
Name (type = personal)
NamePart (type = family)
Al-Azzawi
NamePart (type = given)
Mustafa Kanaan
NamePart (type = date)
1990-
DisplayForm
Mustafa Kanaan Al-Azzawi
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Haber
NamePart (type = given)
Richard A.
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Richard A. Haber
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Birnie
NamePart (type = given)
Dunbar P.
DisplayForm
Dunbar P. Birnie
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Matthewson
NamePart (type = given)
M. John
DisplayForm
M. John Matthewson
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
School of Graduate Studies
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2017
DateOther (qualifier = exact); (type = degree)
2017-10
CopyrightDate (encoding = w3cdtf); (qualifier = exact)
2017
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Extrusion processes are used to form porous materials such as a catalyst supports. They are important in purifying the harmful gas emissions. Titanium dioxide is widely used as an extruded support because of its favorable properties such as high catalytic activity, high thermal, and chemical stability. Catalyst supports are used wildly in industries relating to automobiles, petroleum refining, and energy production where a high catalytic performance is essential. The catalytic performance and species diffusivity are affected by the microstructural variability and pore interconnectivity. Extrusion processes pose problems in the spatial variation of porosity and green strength of extrudate. Typically, the size distribution of an extrudate is measured and quantified using either a helium or mercury porosimetry, but both fail to quantify the spatial variation of porosity. Measuring the handling strength of an extrudate fails to provide a high level of precision that can be obtained from measuring the green strength of extrudate. In this thesis, the water content effect on the green strength and microstructure of extrudate was examined. A quantitative approach using 2-D visualization and segmentation was developed to quantify the spatial variation of porosity. The effect of extrusion velocity on the green strength and spatial variation of porosity of extrudate was also assessed. A wide range of water content and varying binder content of paste were analyzed using torque and capillary rheometer to determine the effect of water content. The effect was evaluated using SEM and green strength measurements. A range of extrusion velocities (shear rates) were conducted on two different paste formulations. Their effect on the spatial variation of porosity in the sheared region (at the die wall) compared to the unsheared region of the extrudate was quantified using a 2-D visualization and segmentation approach. The green strength measurements were also conducted on extrudates to evaluate the effect of extrusion velocity on the green strength. The green strength measurements revealed that there is a clear relationship between the water content of paste and green strength of extrudate, where a high water content results in a high green strength. A relationship between the green strength and extrusion velocity of the extrudate was observed where a high extrusion velocity, the green strength of extrudate decreases because of high shear and ineffective particle arrangement. SEM images showed a reduction in agglomerate size and porosity as a result of high water content. Varying the extrusion velocity has a large effect on the spatial variation of porosity of extrudate. Image analysis showed a low porosity in the sheared region (at the die wall) compared to an unsheared region for samples that were extruded at a low velocity. Conversely, high porosity is observed in the sheared region (at the die wall) compared to an unsheared region for samples that were extruded at a high velocity
Subject (authority = RUETD)
Topic
Materials Science and Engineering
Subject (authority = ETD-LCSH)
Topic
Titanium dioxide
Subject (authority = ETD-LCSH)
Topic
Extrusion process
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_8231
PhysicalDescription
Form (authority = gmd)
electronic resource
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application/pdf
InternetMediaType
text/xml
Extent
1 online resource (xi, 32 p. : ill.)
Note (type = degree)
M.S.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Mustafa Kanaan Alazzawi
RelatedItem (type = host)
TitleInfo
Title
School of Graduate Studies Electronic Theses and Dissertations
Identifier (type = local)
rucore10001600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T3RN3C05
Genre (authority = ExL-Esploro)
ETD graduate
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Al-Azzawi
GivenName
Mustafa
MiddleName
Kanaan
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2017-06-16 15:01:50
AssociatedEntity
Name
Mustafa Al-Azzawi
Role
Copyright holder
Affiliation
Rutgers University. School of Graduate Studies
AssociatedObject
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Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
RightsEvent
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2017-10-31
DateTime (encoding = w3cdtf); (qualifier = exact); (point = end)
2018-10-31
Type
Embargo
Detail
Access to this PDF has been restricted at the author's request. It will be publicly available after October 31st, 2018.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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ETD
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