Synthesis and Analysis of Reactive Materials for Solar Thermochemical Water and Carbon Dioxide Splitting

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Material Information

Title:
Synthesis and Analysis of Reactive Materials for Solar Thermochemical Water and Carbon Dioxide Splitting
Physical Description:
1 online resource (183 p.)
Language:
english
Creator:
Allen, Kyle M
Publisher:
University of Florida
Place of Publication:
Gainesville, Fla.
Publication Date:

Thesis/Dissertation Information

Degree:
Doctorate ( Ph.D.)
Degree Grantor:
University of Florida
Degree Disciplines:
Mechanical Engineering, Mechanical and Aerospace Engineering
Committee Chair:
Klausner, James F
Committee Co-Chair:
Mei, Renwei
Committee Members:
Hahn, David Worthington
Hagelin, Helena Ae
Coker, Eric

Subjects

Subjects / Keywords:
analysis -- carbon -- ceria -- cobalt -- ferrite -- graphite -- hydrogen -- iron -- kinetics -- material -- oxidation -- oxide -- reactive -- redox -- reduction -- solar -- splitting -- synthesis -- thermochemical -- ysz -- zirconia
Mechanical and Aerospace Engineering -- Dissertations, Academic -- UF
Genre:
Mechanical Engineering thesis, Ph.D.
Electronic Thesis or Dissertation
bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )

Notes

Abstract:
In recent years, there has been a renewed emphasis on the production of synthetic fuels as an alternative to fossil fuel extraction and refining.  This has been due to increasing costs and environmental risks associated with these processes.  A promising high-efficiency route to producing these synthetic fuels is thermochemistry utilizing metal oxide reduction-oxidation (redox) reactions. By passing water vapor or carbon dioxide over a reduced metal oxide at favorable temperatures, hydrogen or carbon monoxide can be released through oxidation of the metal oxide.  This metal oxide can then be either chemically reduced using a chemical reductant (such as CO, H2, etc) obtained from an external source, or thermally reduced using heat (such as that obtained via solar thermal radiation).  This process can be continued cyclically for continued hydrogen and carbon monoxide production.  These gases become feedstocks for the Fisher-Tropsch process, a well-established synthetic fuel production method. However, due to the high temperatures involved in these processes, the reactive material must be carefully engineering to withstand these conditions.  Metal oxides without any support from an inert material, such as silica, zirconia or yttria-stabilized zirconia (YSZ), are prone to a loss of chemically active surface area due to sintering at high temperatures.  However,by incorporating these sintering inhibiting materials, the reactive material surface area and, thus, the chemical stability, can be maintained. Here, the most widely used synthesis procedures and analysis methods for the study of reactive materials for solar thermochemical water and CO2 splitting are discussed.  The results of a chemical kinetics and material characterization study on an iron-silica structure are presented.  The characterization of several different cobalt ferrite supported on YSZ reactive materials is performed and chemical kinetic modeling of one of these materials for both thermal reduction and carbon dioxide decomposition is also presented. Additional work on ceria and YSZ composite mixtures is also discussed.
General Note:
In the series University of Florida Digital Collections.
General Note:
Includes vita.
Bibliography:
Includes bibliographical references.
Source of Description:
Description based on online resource; title from PDF title page.
Source of Description:
This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Thesis:
Thesis (Ph.D.)--University of Florida, 2013.
Local:
Adviser: Klausner, James F.
Local:
Co-adviser: Mei, Renwei.
Electronic Access:
RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2015-08-31
Statement of Responsibility:
by Kyle M Allen.

Record Information

Source Institution:
UFRGP
Rights Management:
Copyright Kyle M Allen Permission granted to the University of Florida to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
Resource Identifier:
Classification:
lcc - LD1780 2013
System ID:
UFE0045783:00001