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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.
1

Silica supported binuclear copper catalysts : preparation and characterization

Choksi, Homiyar N. 05 1900 (has links)
No description available.
2

An experimental investigation of catalysis in the combustion of composite solid propellants

Handley, J. C. (John Charles) 05 1900 (has links)
No description available.
3

Studies of skeletal copper catalysts :

Wainwright, Mark S. Unknown Date (has links)
Thesis (DSc(DoctorateofScience))--University of South Australia, 2003.
4

The perester-copper salt reaction of cyclic olefins /

Phillipou, George. January 1972 (has links) (PDF)
Thesis (M.Sc.) -- University of Adelaide, Dept. of Organic Chemistry, 1973.
5

Enantioselective copper-catalysed reductive coupling of alkenylazaarenes

Choi, Bonnie January 2015 (has links)
Chiral azaarene-containing molecules, tertiary alcohols and α-stereogenic amines are ubiquitous structures in pharmaceuticals, agrochemicals and natural products. The development of new catalytic enantioselective methods to construct molecules containing these chemotypes is of significant utility. Recent efforts within the Lam group have targeted the development of processes that exploit the embedded imine functionality within an azaarene to activate adjacent alkenes towards nucleophilic additions. Chapter 1 reviews the current state of the art with respect to nucleophilic additions of alkenylazaarenes and catalytic conjugate reduction reactions. Chapter 2 describes a catalytic, enantioselective reductive coupling of 2- alkenylazaarenes with ketones using chiral CuH-bisphosphine complex in the presence of PhSiH3 as a hydride source. The scope of this process is broad, with eleven different types of azaarenes and a range of acyclic and cyclic ketones demonstrated as effective coupling partners. β-Substitution on the alkene is tolerated, and the reactions proceed under mild conditions to deliver products with good to high levels of diastereo- and enantio- selection. Chapter 3 describes, further investigation of the scope of enantioselective reductive coupling, using N-Boc aldimines as electrophiles. This process is tolerant of a variety of vinylazaarenes and N-Boc aldimines, and provides aromatic heterocycles bearing α-stereogenic amines with good to moderate yields and good to excellent levels of diastereo- and enantio- selection.
6

The catalytic activity of copper chlorides: dehydrochlorination of tert-butyl chloride.

Leung, Ka-sing, 梁嘉聲 January 1975 (has links)
published_or_final_version / Chemistry / Master / Master of Philosophy
7

The catalytic activity of copper chlorides : dehydrochlorination of tert-butyl chloride.

Leung, Ka-sing, January 1975 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1975.
8

Model copper/zinc oxide catalysts for methanol synthesis : the role of surface structure /

Yoshihara, Jun, January 1997 (has links)
Thesis (Ph. D.)--University of Washington, 1997. / Vita. Includes bibliographical references (leaves [133]-140).
9

The rate and activation energy of the first order dehydration of 2-butanol over a copper chromite catalyst

Cantrell, Joseph Sires. January 1957 (has links)
Call number: LD2668 .T4 1957 C35 / Master of Science
10

Characterization of copper/zinc-oxide catalysts for methanol reformation.

Goodby, Brian Edward. January 1988 (has links)
The research presented in this dissertation involved characterization of the Cu/ZnO solid catalyst system as applied to methanol/steam reformation. Thermogravimetry was used to investigate in-lab synthesized samples and a commercial product G66B (Cu/ZnO 33/67 wt. %). The 33% Cu sample contained Cu ions in the ZnO matrix. This phase required the highest temperatures (400°C) for H₂ reduction. The 50% Cu sample reduced at a lower temperature (220°C) but its complete reduction required the same maximum temperature. The higher temperature process was similar to the 33% case, while the lower one was due to the reduction of a amorphous CuO phase. The 66% Cu sample reduced in a fairly narrow low temperature (270°C) range. Therefore, its CuO phase has a amorphous structure. G55B reduced at lower temperatures than the in-lab samples. This difference is possibly due to different synthetic procedures used in the production of G66B and the in-lab samples. The CuO phase of G66B appears to be amorphous and well dispersed. Raman spectroscopy was used to identify the crystal phases of these solids. The complexity of the initial precipitate was monitored versus the Cu/Zn ratio of the system. The nature of the phases present under reduction conditions was determined. This information has provided insight into the active phases involved in methanol reformation. The role of the solids lattice oxygen was determined. The reaction was carried out on labelled ¹⁸O-containing Cu/ZnO. Incorporation of ¹⁸O into both CO₂ and H₂O clearly indicates the involvement of these oxygens in the reaction. Observation of C¹⁸O¹⁸O indicates that the C-O bond in methanol does not remain intact. XPS was used to determine the effects of oxidation, reduction, and reaction on the Cu component of G66B. Upon oxidation all Cu exists as Cu⁺². The catalyst always contains Cu⁺¹ and Cuᵒ after H₂ reduction. After methanol/steam reformation with a 50/50 vol% mxiture, all Cu is reduced to Cuᵒ. Changes in the Cu/Zn ratio of the surface are interpreted in terms of changes in surface morphology.

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