Industrial Chemistry 2 - Rößner

Our expertise

  • Heterogeneous catalyzed gas and liquid phase reactions in flow and gas recycle reactors.

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    • Heterogeneous catalyzed rearrangement reactions in liquid phase
    • Hydroamination of alcohols
    • Conversion of methyl butynol for detemination of basic and acidic properties of oxidic catalysts
    • Characterization of active centres on heterogeneous catalysts
    • Modification of silicious surfaces

  • Developement and characterization of mono and bifunctional catalysts on the basis of zeolites, SiO2, Al2O3 and layered silicates.


Characterization of spezialized ion exchanger

  • Developement of inorganic-organic composite materials for use in material seperation and catalysis.
  • DRIFT spectroscopy for quantitative analysis of sorption of aromatic amino acids on ion exchangers with styrol divinylbenzene copolymer matrix.

  • Investigation of the catalytic activity by methyl butynol testreaction (MBOH).
  • Determination of the hydrophilicity of silicalistic materials by hydrophobicity index (HI).
 
  • Cooperation:
    Voronezh State University
    (Russian Federation)
 
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DRIFT measurement


Developement of new bifunctional catalysts

  • With bifunctional reactions hydrogen is activated on the metal and diffuses on the surface to the acidic centre, where the carbon hydrate conversiontakes place (i.e. the hydroisomerization of n-hexane). Due to the mobility of the activated hydrogen it is possible to create the bifunctional catalyst by mixing of the metallic (metal on support) and the acidic component (H-zeolite). The component metal/support can be seperately pre-treated from the zeolite, so that the metal is constrictedly accessible for catalyst poisons, but furthermore active for hydrogen activation.
 
  • Cooperation:
    University of Erlangen-Nuremberg
 
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Extended model of bifunctional catalysis


Synthesis of nanodispersed semiconductors in a zeolite matrix

  • Synthesis of zeolites with CdS and ZnS nanoparticles in the pore structure.

  • DRIFT investigations of the solid state ion exchange on selected examples in different temperature ranges.

  • Temperature-programmed H2/CO evolution for investigation of the chemisorption and the physisorption behaviour, respectively.

 
  • DRIFT investigations of zeolite-semiconductor composites for determination of OH and SH group fractions.

  • Transmission electron microscopy for structure determination.

 
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DRIFT measurements of H-beta zeolites subsequent to a H2S treatment
 
  • Cooperation:
    Physics RAS Chernogolovka
    (Russian Federation)


Analytics

  • Surface determination and pore size distribution according to BET.

  • Temperature-programmed reduction (TPR), oxidation (TPO) and hydrogen evolution (TPHE).

  • Temperature-programmed Ammonia desorption (TPAD) for acidic centre characterization.

  • Diffuse reflectance UV/Vis spectroscopy.

  • Differential scanning calorimetry (DSC).

 
  • For gas phase reactions automated rigs with online GC with TCD, FID and MS detectors and with multi postion valves for kinetic investigations are available.

  • Gas chromatographic analysis of complex mixtures (i.e. alkane/aromatic/olefine, amine) in the temperature range of -45 to 270 °C.

  • Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) for in-situ investigations of reactions on heterogeneous catalysts.

 
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NH3-TPD profile on NaH-beta zeolites

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