Sökning: "ZSM-5 zeolite"

Visar resultat 1 - 5 av 52 avhandlingar innehållade orden ZSM-5 zeolite.

  1. 1. Crystallization of NBA-ZSM-5 from kaolin

    Författare :Wilson Aguilar-Mamani; Johanne Mouzon; Benoît Louis; Luleå tekniska universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; zeolite; ZSM-5; n-butylamine; crystal; raw materials; Chemical Technology; Kemisk teknologi;

    Sammanfattning : ZSM-5 is an aluminosilicate zeolite with high Si/Al ratio with suitable properties for catalysis, ion exchange, adsorption and membrane applications. The main goal of this thesis was to study the growth of ZSM-5 zeolite crystals from inexpensive natural sources of silica and alumina, as well as n-butylamine (NBA) as a low-cost structure directing agent. LÄS MER

  2. 2. Preparation and characterization of collodial suspensions of ZSM-5 type zeolites

    Författare :Anders Persson; Chalmers University of Technology; []
    Nyckelord :silicalite-1; redisperison; FTi.r.; monodisperse; ZSM-5; colloidal zeolite; 27A1 MAS n.m.r.; dynamic light scattering;

    Sammanfattning : .... LÄS MER

  3. 3. Synthesis of zeolites from economic raw materials

    Författare :Edgar Cardenas; Jonas Hedlund; Saul Cabrera; Niklas Hedin; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zeolite; raw materials; Y-zeolite; ZSM-5; Chemical Technology; Kemisk teknologi;

    Sammanfattning : Synthesis methods using economic raw materials, such as kaolin and diatomite have been developed for the production of zeolites in the present work. Zeolite Y and ZSM-5 have been synthetized successfully from diatomite and kaolin, respectively. LÄS MER

  4. 4. Studies of the influence of ZSM-5 synthesis on activity and stability of Cu-ZSM-5 in leand NOx reduction

    Författare :Malin Berggrund; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HC-SCR; Cu-ZSM-5; catalysis; propene; lean NOx reduction; hydrothermal stability;

    Sammanfattning : The growing concern about the global warming coupled with the increasing emissions of the greenhouse gas carbon dioxide, combined with the climbing oil price, drives the interest to more fuel efficient lean combustion engines for automotive applications. Such engines require new technical solutions for reduction of NOx in the exhaust gases, which are in excess oxygen, where a conventional three-way catalyst cannot be used to reduce NOx. LÄS MER

  5. 5. Selective Catalytic Reduction of NOx with NH3 - Kinetic Modeling and Experimental Studies using Zeolite Based Catalysts

    Författare :Hanna Maria Sjövall; Chalmers University of Technology; []
    Nyckelord :Selective catalytic reduction; SCR; NO reduction; Ammonia; Fe-zeolite; DRIFT; Cu-ZSM-5; Zeolite; Nitrogen oxide; Kinetic modeling;

    Sammanfattning : Emissions from the combustion of fossil fuel contain several pollutants which can be converted over a catalyst to less harmful products. An efficient way to reduce nitrogen oxides in a lean environment is to apply selective catalytic reduction of these oxides with ammonia (NH3 SCR). LÄS MER