• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 219
  • 65
  • 41
  • 34
  • 15
  • 5
  • 5
  • 5
  • 5
  • 5
  • 5
  • 5
  • 5
  • 2
  • 2
  • Tagged with
  • 508
  • 72
  • 68
  • 68
  • 49
  • 47
  • 41
  • 38
  • 38
  • 36
  • 35
  • 32
  • 31
  • 30
  • 30
  • 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.
11

Reactions of glucose in H-Y zeolite catalysts

Lourvanij, Khavinet 26 June 1991 (has links)
Y-Zeolite catalysts have the potential to promote the shape-selective conversion of glucose to oxygenated hydrocarbons at fairly low temperature (100 to 130°C). Reaction of glucose solution with H-Y Zeolite catalyst powder was carried out in a well-mixed batch reactor. This reaction was studied as a function of reaction time (0 to 24 hours), temperature (100 to 130°C), catalyst loading (10:1 to 1:1 glucose:Y-Zeolite), and initial glucose concentration (12% to 58% g glucose/g solution). Unreacted glucose and reaction products were analyzed by HPLC. The dehydration of glucose solution by H-Y Zeolite catalyst powder resulted in 90% conversion at 2:1 glucose: H-Y Zeolite and 130°C. At these conditions, maximum levulinic acid and formic acid yields were 15% and 30% respectively. A pseudo first-order process was used to estimate the apparent rate constant for glucose conversion at various temperatures. From the Arrhenius equation, the apparent activation energy was estimated as 22.06 kCal/mole for glucose solution initially at 12% weight. Based on the product distribution data, a reaction model for glucose dehydration to HMF, levulinic acid, and formic acid in Y-Zeolite catalysts was proposed. / Graduation date: 1992
12

Pervaporation of solvent mixtures using polymeric and zeolitic membrances separation studies and modeling /

Shah, Dhaval S. January 2001 (has links) (PDF)
Thesis (Ph. D.)--University of Kentucky, 2001. / Title from document title page. Document formatted into pages; contains xiv, 254 p. : ill. Includes abstract. Includes bibliographical references (p. 237-253).
13

Development and application of the zero length column (ZLC) technique for measuring adsorption equilibria /

Brandani, Federico, January 2002 (has links)
Thesis (Ph.D.) in Chemical Engineering--University of Maine, 2002. / Includes vita. Bibliography: leaves 124-127.
14

A study of the photodegradation of carbaryl : the influence of natural organic matter and the use of silver zeolite Y as a catalyst /

Kanan, Marsha, January 2002 (has links)
Thesis (M.S.) in Chemistry--University of Maine, 2002. / Includes vita. Bibliography: leaves 102-107.
15

Nitrogen monoxide reduction over ZSM-5 zeolite-supported catalysts / by Fakhry Seyedeyn-Azad.

Seyedeyn-Azad, Fakhry (Fakrolsadat) January 1999 (has links)
Bibliography : leaves 210-222. / xxvii, 243 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Shows how ZSM-5 zeolites can be synthesised under different conditions, and highlights the effect of zeolite properties on the activity of zeolite-supported catalysts for direct decomposition and selective catalytic reduction of nitrogen monoxide. / Thesis (Ph.D.)--University of Adelaide, Dept. of Chemical Engineering, 1999
16

Nitrogen monoxide reduction over ZSM-5 zeolite-supported catalysts /

Seyedeyn-Azad, Fakhry January 1999 (has links) (PDF)
Thesis (Ph.D)--University of Adelaide, Dept. of Chemical Engineering, 1999. / Bibliography : leaves 210-222.
17

Transition metal incorporated silicalites for heterogeneous oxidative catalysis

Ma, Xisai. Stiegman, Albert E. January 2005 (has links)
Thesis (Ph. D.)--Florida State University, 2005. / Advisor: Dr. Albert E. Stiegman, Florida State University, College of Arts and Sciences, Dept. of Chemistry and Biochemistry. Title and description from dissertation home page (viewed June 8, 2005). Document formatted into pages; contains xiii, 79 pages. Includes bibliographical references.
18

Nitrogen monoxide reduction over ZSM-5 zeolite-supported catalysts /

Seyedeyn-Azad, Fakhry. January 1999 (has links) (PDF)
Thesis (doctoral)--University of Adelaide, 1999. / Bibliography : leaves 210-222.
19

Fabrication and applications of zeolite microstructures /

Sun, Wenqing. January 2005 (has links)
Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2005. / Includes bibliographical references. Also available in electronic version.
20

Using solid-solution aqueous-solution theories to model the crystallization of ZSM-5 zeolites

Fickel, Dustin W. January 2007 (has links)
Thesis (M.Ch.E.)--University of Delaware, 2007. / Principal faculty advisor: Raul F. Lobo, Dept. of Chemical Engineering. Includes bibliographical references.

Page generated in 0.0622 seconds