Sökning: "Chlorine dioxide"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden Chlorine dioxide.

  1. 1. Delignification and bleachability of kraft pulps pretreated with nitrogen dioxide

    Författare :Per Larsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chlorine dioxide; oxygen bleaching; molecular mass; paper properties; ozone bleaching; nitrogen dioxide; kraft pulps; pretreatment; gel permeation chromatography; indulin AT; hydrogen peroxide; consecutive alkaline extractions;

    Sammanfattning : .... LÄS MER

  3. 2. Localized corrosion of stainless steels in chlorine dioxide bleach filtrate solutions

    Författare :Gustaf Bäck; KTH; []
    Nyckelord :stainless steels; bleaching; chlorine dioxide; ClO2; localized corrosion; weld oxides; redox potential; potentiostatic polarization; scanning Kelvin probe;

    Sammanfattning : Stainless steels are extensively used in pulp bleach plantsbecause of their high corrosion resistance. However, alsostainless steels might suffer from corrosion and in bleachplants this is a problem. LÄS MER

  4. 3. Prevention of barium sulfate deposition in a D (Chlorine Dioxide) - stage : a chemical model

    Författare :Malin Persson; KTH; []
    Nyckelord :Barium; Sulfate; Chlorine dioxide; Sytem closure; Deposits; Precipitation; Chemical model; Steady state; Inorganic compounds; Kraft pulping; Paper mills; Inhibitors;

    Sammanfattning : .... LÄS MER

  5. 4. Porous Cerium Dioxide for Catalytic Applications

    Författare :Mats Lundberg; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; materialteknik; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Materiallära; Material technology; catalysis; transmission electron microscopy; macroporous; mesoporous; cerium dioxide; zirconium dioxide;

    Sammanfattning : Mesoporous cerium dioxide with high crystallinity has been synthesized and studied by TEM, SEM, nitrogen adsorption, PXRD, AFM, and SAXS. The catalytic properties of the materials have been investigated The results of the catalysis experiments were correlated with high resolution TEM investigations of the corresponding material, and it was found that the exposed crystallographic facets play an important role in the conversion of carbon monoxide to carbon dioxide. LÄS MER

  7. 5. Molecular Beam Studies of Interactions Between Ice Surfaces and Atmospherically Relevant Molecules

    Författare :Liza Romero Lejonthun; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; molecular beam; surface; surface scattering; collision; water ice; ice; chlorine; nitrogen oxides; nitrogen monoxide; nitrogen dioxide; dinitrogen tetroxide; dinitrogen pentoxide; nitric acid; helium; graphite;

    Sammanfattning : The discovery of the ozone hole over Antarctica in 1985 was one of the environmental issues that attracted most attention worldwide in the end of the last century. The cause of the ozone hole formation was proven to be coupled to the emission of chlorofluorocarbons (CFCs). LÄS MER