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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Enhancing hydrogen production in microbial electrolysis cells through development of platinum-free cathode and improvement of reactor design /

Hu, Hongqiang. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2010. / Printout. Includes bibliographical references (leaves 92-100). Also available on the World Wide Web.
62

Interfacial investigations of corrosion and corrosion inhibition on the aluminum alloy AA2024-T3

Dufek, Eric J. January 2007 (has links)
Thesis (Ph.D.)--University of Wyoming, 2007. / Title from PDF title page (viewed on June 22, 2009). Includes bibliographical references.
63

Modeling of an aluminum reduction cell for the development of a state estimator

Biedler, Philip. January 1900 (has links)
Thesis (Ph. D.)--West Virginia University, 2003. / Title from document title page. Document formatted into pages; contains xi, 172 p. : ill. (some col.). Includes abstract. Includes bibliographical references.
64

Interfacial fluid pressure and pad viscoelasticity during chemical meachanical polishing

Hight, J. Robert 05 1900 (has links)
No description available.
65

Synthesis of carbon nanotubes on metallic grids for applications in electrochemical capacitors

Nasuhoglu, Deniz. January 2007 (has links)
Recently, there has been a growing demand for electrode materials to serve as electrochemical capacitors (EC). It has been an important issue to come up with environment friendly electric power sources to reduce pollution caused by combustion engines of automotive systems. Even though conventional battery systems and fuel cells supply high energy, they lack the high specific power that would be required for hybrid power sources. The ECs can fill the gap between conventional capacitors and batteries. / Carbon nanotubes (CNTs), discovered by Iijima in 1991, attracted great attention in recent years for their unique properties, such as mesoporous character, excellent conductivity, moderate to high specific surface area as well as chemical and mechanical stability. These properties of CNTs make them useful in a wide of range applications including electrode materials for EC applications. / The preparation of CNT electrodes is accomplished by either pasting them onto metallic current collectors with the use of binder materials such as PVDF or growing them from deposited metal nanoparticles on substrates such as graphite paper. The deposition of metal nanoparticles is achieved via sputtering techniques or lengthy electrochemical deposition methods. The aim of this research was to simplify the preparation step by growing CNTs directly on metallic substrates and to study the relationship between surface area and electrochemical capacitance of CNTs. CNTs were produced on metal-alloy grids via chemical vapor deposition (CVD) of acetylene (C2H2). The physical characterization of the samples was achieved by Field Emission Scanning Electron Microscopy (FE-SEM), Raman spectroscopy and Single point BET surface area. The electrochemical performance of the samples was evaluated by cyclic voltammetry (CV) in a three electrode electrochemical cell with 1M sulfuric acid (H2SO4) solution as the electrolyte.
66

Modelling of sulphide minerals :

Huang, Guozhi. Unknown Date (has links)
In this study the unique Magotteaux Mill® system was used to control the grinding chemical conditions, which may be adjusted by varying grinding media, purging gas and pH, during grinding. An electrochemical apparatus was used to investigate oxidation-reduction behaviour of grinding media and sulphide mineral electrodes, as well as their galvanic interaction in-situ of the Magotteaux Mill®. Galvanic interaction between the grinding media (mild steel, 15% chromium, 21% chromium and 30% chromium media) and the sulphide minerals (bornite, arsenopyrite and pyrite) was initially quantified in-situ of the mill by electrochemical techniques under different grinding atmospheres (nitrogen, air and oxygen). An innovative mathematical theoretical model was developed to describe the effect of galvanic interaction on oxidation rates of the grinding media during grinding, which was verified by the experimental data. Galvanic interaction enhanced the oxidation of the grinding media and produced more oxidized iron species in the mill discharge. It was observed that oxidized iron species (EDTA extractable iron) was linear with galvanic current between the grinding media and the sulphide minerals, in agreement with the prediction of the theoretical model. The effect of grinding conditions on pulp chemistry, surface properties and floatability was investigated by the measurement of dissolved oxygen (DO), pH, pulp potential (Eh), ethylene diamine-tetra acetic acid (EDTA) extraction, X-ray photoelectron spectroscopy (XPS) and floatation recovery. / Thesis (PhDAppliedScience)--University of South Australia, 2005.
67

Advanced nanomaterials for fuel cell catalysts characterization of bimetallic nanoparticles /

Lin, Yan. January 2006 (has links)
Thesis (M.S.)--State University of New York at Binghamton, Department of Chemistry and Materials Science & Engineering, 2006. / Includes bibliographical references (leaves 49-53).
68

The role of galvanic coupling effect in determining crevice corrosion morphology /

Hua, Huizhong January 1998 (has links)
Thesis (Ph.D.) -- McMaster University, 1998. / Includes bibliographical references (leaves 149-158). Also available via World Wide Web.
69

Hydro-electric treatment of Joplin-Miami zinc concentrate

Walsh, David Francis. January 1924 (has links) (PDF)
Thesis (M.S.)--University of Missouri, School of Mines and Metallurgy, 1924. / The entire thesis text is included in file. Typescript. Title from title screen of thesis/dissertation PDF file (viewed June 23, 2009) Includes bibliographical references (p. 105).
70

Oxidation and reduction of aldehydes from the standpoint of electromotive force measurements,

Arenson, Saul Bryan, January 1924 (has links)
Thesis (PH. D.)--University of Nebraska. / Bibliography: p. 3-4. Also issued in print.

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