Sökning: "MFI"

Visar resultat 1 - 5 av 41 avhandlingar innehållade ordet MFI.

  1. 1. MFI-molecular sieve membranes : synthesis, characterization and modelling

    Författare :Fredrik Jareman; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Technology; Kemisk teknologi;

    Sammanfattning : This work concerns evaluation by permeation measurements and modeling of thin (.... LÄS MER

  2. 2. Gas Adsorption and Permeation in MFI Zeolites and Membranes

    Författare :Sang Wirawan; Chalmers University of Technology; []
    Nyckelord :composite membranes; TPD; MFI zeolites; WGS membrane reactor; adsorption; FTIR spectra;

    Sammanfattning : The single and multi component gas adsorption behavior on silicalite-1 and cation exchanged MZSM-5 zeolites (M = H, Na, and Ba) were investigated by a step change response method. Temperature programmed desorption (TPD) and in-situ fourier transform infrared (FTIR) spectroscopy were also performed to study the type of adsorbed species and their thermal stabilities. LÄS MER

  3. 3. Factors affecting MFI membrane quality

    Författare :Charlotte Andersson; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Technology; Kemisk teknologi;

    Sammanfattning : Zeolites are crystalline aluminosilicates with molecular sieving properties and are widely used in industrial applications such as catalysis, sorption and ion-exchange. Zeolite membranes are highly interesting due to their capability to continuously separate molecules under severe conditions. LÄS MER

  4. 4. Tuned acidity in zeotypes: A descriptor to unravel the direct conversion of methane to methanol

    Författare :Simone Creci; Chalmers University of Technology; []
    Nyckelord :methanol; catalysis; MFI; infrared spectroscopy; methane; zeotype; zeolite;

    Sammanfattning : The catalyst's acidity is crucial in countless chemical reactions, and thus to tune this parameter means to take the lead on the desired catalytic reaction. Therefore, it is not surprising that zeolites have been used since decades as catalysts for their outstanding properties of solid acids. LÄS MER

  5. 5. The effect of framework structure on N2O formation over Cu-based zeolites during NH3-SCR reactions

    Författare :Ghodsieh Isapour Toutizad; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; Catalysis; Infrared spectroscopy; SCR; MFI; Nitrous Oxide; CHA; Ammonium nitrate; BEA; Zeolites;

    Sammanfattning : Anthropogenic nitrous oxide (N2O), which is generally formed as a byproduct of industrial chemical processes and fossil fuel combustion, has attracted significant attention in recent years due to its destructive role in global warming and ozone layer depletion. Among different developed technologies applied for lean NOx reduction, the selective catalytic reduction (SCR) of NOx with ammonia (as a reducing agent) is presently the most used method. LÄS MER