NDLTD logo NDLTD Union Catalog and Global ETD Search

Global ETD Search

Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.

Results

Showing 1 to 20 of 22 for “"Wet impregnation"”.

  1. Synthesis and characterization of micro- and mesoporous materials for low temperature selective catalytic reduction of nitrogen oxides

    Kasongo Wa Kasongo, Jean B.University of the Western Cape2011

    … and Mn containing catalysts can be prepared by wet impregnation and not by ion exchange because of the competition between two different metals at different oxidation number. Only a single metallic phase catalyst could be prepared successfully by using ion exchange.

    western-cape Repository record

  2. Preparation of Copper-Based Oxygen Carrier Supported on Titanium Dioxide

    Cui, Yaowen

    … combustion development. In this study, modified wet impregnation and co-precipitation methods have been developed. The active ingredient is copper(II) oxide, and the supporting material is either directly from titanium(IV) oxide (anatase 99%) or that prepared from other titanium resources such as …

    wku-diss Repository record

  3. Preparation and Characterization of Palladium Catalysts

    Anderson, Michael J.2015

    … by alternative methods including: preparation by wet impregnation or incipient wetness, drying by room temperature or air-oven, and support choice between silica and alumina. These catalysts were prepared to meet the demand for low temperature oxidation. Results indicated a 5% increase in percent …

    columbus-state Repository record

  4. Selective methanation of CO in H2-rich gas using Pd/TiO2, Ni/TiO2 and PdNi/TiO2 catalysts

    Mtemeli, Patronella SiphatisiweDepartment of Chemical Engineering2024

    … catalysts for CO-SMET in H2 gas through wet impregnation and polyol methods. The structural characterisation of the catalys

    cape-town Repository record

  5. Carbeto de molibdênio promovido por níquel como catalisador na reação de reforma seca do metano

    Oliveira, Peter Monnerat Celes Rodrigues deUniversidade Federal do Rio de Janeiro2016

    … by the methods of coprecipitation (CP), wet impregnation and mechanical mixture in order to achieve the Ni/Mo molar ratio of 0.2. These oxides were carburized to synthetize the catalysts. The precursors and catalysts were characterized by X-ray diffraction (XRD), temperature-programmed …

    brazil-uerj Repository record

  6. Studies of tartaric acid modified nickel supported catalysts for enantioselective hydrogenation reactions

    Lopez Martinez, Marco AntonioUniversity of Birmingham2011

    … catalytic properties compared to one prepared by wet impregnation techniques.

    birmingham Repository record

  7. Super-ambient temperature gas phase photocatalysis

    Bingham, MichaelQueen's University Belfast2020

    … and hydrogen. The catalysts were made via a wet impregnation method, typically between 0.01 to 10 wt.%. </p> <p class="MsoNormal"> </p> <p class="MsoNormal">It was observed for both these reactions that as the metal loading increased so did the rate of reaction for hydrogen production. This …

    qu-belfast Repository record

  8. Preparation, Characterization, and Evaluation of Photocatalytic Properties of a Novel NaNbO3/Bi2WO6 Heterostructure Photocatalyst for Water Treatment

    Qiao, YuUniversité d'Ottawa / University of Ottawa2018

    … were successfully prepared via a facile wet impregnation method. The as-prepared photocatalysts were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), …

    ottawa-retro Repository record

  9. Development of tandem catalytic systems utilizing mesoporous silica nanoparticles

    Metzger, Kara E.Colorado School of Mines. Arthur Lakes Library2022

    … utilizing the unique surface within the pores. A wet impregnation method has been used to load palladium and gold nanoparticles onto MSN for the direct oxidative esterification of allyl alcohol. The tandem catalyst was then coated with a polydopamine polymer coating to prevent leaching of the …

    colo-mines Repository record

  10. TiO2-supported copper nanoparticles prepared via ion exchange for photocatalytic hydrogen production

    Tian, HaoUNSW, Sydney2014

    … IE Cu/TiO2 was compared with Cu/TiO2 prepared by wet impregnation (WI) and reasons for the differences in performance were investigated. The particle synthesis approach comprised three key stages: (1) hydrothermal synthesis to produce sodium titanate; (2) ion-exchange of sodium titanate to produce …

    unsw Repository record

  11. The photo-oxidation of benzyl alcohol over TiO2 and Pt TiO2 and the effect of reaction conditions

    Mlangeni, NomathamsanqaDepartment of Chemical Engineering2024

    … and the platinum was anchored on titania using a wet impregnation method, with H2PtCl6.6H2O as the precursor salt. The synthesized platinum catalysts were characterized using PXRD, TEM, BET, ICP – OES. The spent catalysts were characterized using TEM, Raman, TGA and ATR-FTIR. The catalysts were …

    cape-town Repository record

  12. Heterogeneous and Monolithic Catalyst Development for the Biodiesel Production Process & Evaluation of Static Mixers for the Esterification Process

    Annamalai, NagarajanFaculty of Graduate Studies and Research, University of Regina2012

    … coating techniques such as the sol-gel and wet impregnation methods to deposit MoO3/Al2O3 on stainless steel supports. The metal monolithic catalyst prepared with this technique did not yield satisfactory results with respect to the coat adhesion stability. Another important aspect of this …

    regina Repository record

  13. SYNTHESIS OF EFFICIENT PHOTOCATALYSTS IN EXTREME TEMPERATURE CONDITIONS FOR THE DEGRADATION OF AIR POLLUTANTS.

    FRIAS ORDONEZ, MARCELAUniversità degli Studi di Milano2025

    … an Ag-STO system was synthesized through a wet impregnation method, where the STO surface was modified with Ag particles pre-synthesized via the electrochemical method, using Ag+ enriched-solution wastewater as a starting material. This multistep approach led to a significant increase in NOx …

    milano Repository record

  14. The production of pure hydrogen with simultaneous capture of carbon dioxide

    Bohn, ChristopherUniversity of Cambridge2010

    … unnecessary unless reduction to Fe is performed. Wet-impregnation of Fe2O3 was performed with salts of Al, Cr and Mg or with tetraethyl orthosilicate for Si to give loadings of 1-30 mol % of the additive element. The addition of Al stabilised the quantity of H2 produced when the sample was reduced …

    cambridge Repository record

  15. Study of the effects of promoters (MnOx and FeOx) on Co3O4/CeO2 during Preferential Oxidation of Carbon monoxide

    Ndila, NoluvuyoDepartment of Chemical Engineering2022

    … 10 wt.% Co3O4 was supported and promoted via wet impregnation using ultrasonication. The addition of the promoters improves the redox properties of Co3O4. TPR showed an increase in the reduction temperature of Co3O4, while TPO showed a decrease in the re-oxidation temperature of metallic Co. …

    cape-town Repository record

  16. Catalytic oxidation of cresols using molecular ozone

    Ncanana, Zamani SiphepheloUniversity of Zululand2017

    … SiO2 and V2O5 catalysts were synthesized by wet impregnation method. These catalysts were further calcined (300 oC) in air and characterized using powder X-ray diffraction (XRD), Fourier Transform-Infrared (FT-IR), inductively coupled plasma-optical emission spectroscopy (ICP-OES), scanning …

    zulu Repository record

  17. SYNTHESIS AND CHARACTERIZATION OF SUPPORTED SOLID ACID CATALYSTS FOR CONVERSION OF GREEN SEED CANOLA OIL TO BIODIESEL

    Kurhade, Ankeeta 1990-University of Saskatchewan2019

    … % HPW on MAS-7/MAS-9 catalysts was prepared by a wet impregnation technique. Detailed insights into the surface chemistry of HPW supported on MAS catalysts were obtained with the help of Raman, Infrared, 29Si magic-angle spinning and cross-polarization/MAS nuclear magnetic resonance (NMR), and …

    sask Repository record

  18. Mesoporous materials and nanostructured LiFePO4 as cathodes for secondary Li-ion batteries: synthesis and characterisation

    GERBALDI, CLAUDIOPolitecnico di Torino2006

    … (both MnO2 and Fe2O3) nanoparticles, by the wet impregnation technique. Finally, the experimental results are reported regarding the strategy adopted in order to support nanoparticles of FePO4, which is a well-known and extensively studied material for Li-ion batteries, into the channels of …

    poli-torino Repository record

  19. Platinum Nanoparticles to Study Metal Location in Shape-Selective Hydrocracking

    Nel, DayleCentre for Catalysis Research2018

    … in this study the Pt metal was supported using wet impregnation which does not allow for control of metal size and location. The hydrocracking mechanism consists of a (de)hydrogenation function at the metal sites and cracking/isomerisation steps at the acid sites. The reason a high yield of high …

    cape-town Repository record

  20. SYNTHESIS AND CHARACTERIZATION OF NEW ELECTROCATALYTIC MATERIALS TO IMPROVE THE PERFORMANCE, OPERABILITY AND LIFE-TIME OF PEMFCS

    ZENG, JUQINPolitecnico di Torino2012

    … on ordered mesoporous carbon (OMC: CMK-3) by impregnation of phosphotungstic acid (PWA) and subsequent annealed in N2 atmosphere. The WO3 modified ordered mesoporous carbons (MC-WO3) retained the ordered mesostructure, high BET specific surface area and large pore volume. The MC-WO3 supported …

    poli-torino Repository record

Page 1 of 2