Sökning: "higher alcohols"

Visar resultat 16 - 20 av 51 avhandlingar innehållade orden higher alcohols.

  1. 16. Surface chemical studies on feldspar/quartz system using alkylamines and mixed (cationic/anionic/non-ionic) collectors : adsorption mechanisms and flotation selectivity

    Författare :Ari Vidyadhar; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

    Sammanfattning : The mechanism of adsorption of long chain alkyl primary amines and, co-adsorption of amines and alcohols on quartz were studied using FTIR (DRIFT and IRRAS) and XPS spectroscopy methods. The spectroscopy data were correlated with zeta-potential and Hallimond flotation results. LÄS MER

  3. 17. Flotation of silicate minerals : physico-chemical studies in the presence of alkylamines and mixed (cationic/anionic/non-ionic) collectors

    Författare :Vidyadhar Ari; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

    Sammanfattning : The mechanism of adsorption of long chain alkyl primary amines and, co-adsorption of amines and alcohols on silicate minerals (quartz and feldspar) were studied using FTIR (DRIFT and IRRAS) and XPS spectroscopy methods. The spectroscopy data were correlated with zeta-potential and Hallimond flotation results. LÄS MER

  4. 18. Experimental Study of Using Butanol or Octanol Blends as Alternative Fuels in Diesel Engines

    Författare :Tankai Zhang; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : With the increased travel demand, the consumption of fossil fuels, as the main energy source for transportation, has risen sharply over the last few decades. Fossil fuels are considered a non-renewable resource. In addition, burning them in internal combustion engines can generate a large amount of greenhouse gas (GHG) emissions. LÄS MER

  5. 19. Kinetic investigations of combustion of small oxygenated aliphatic hydrocarbons – modeling and experiments

    Författare :Gianluca Capriolo; Förbränningsfysik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kinetic modelling; Nitric Oxide; n-propanol; i-propanol; propanal; LIF; Fysicumarkivet A:2020:Capriolo;

    Sammanfattning : The depletion of oil reserves and the increasingly stringent European Union regulation of air pollution have forced researchers and manufacturers to search for cleaner and sustainable substitutes to petroleum‐based transportation fuels. Biofuels like small aliphatic alcohols are of increasing interest as alternatives to fossil fuels, as they offer long‐term fuel‐source regenerability. LÄS MER

  7. 20. Enantiomeric Separations using Chiral Counter-Ions

    Författare :Jakob Haglöf; Curt Pettersson; Anders Karlsson; Jacques Crommen; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Capillary Electrophoresis; Chiral Counter-Ion; Divalent Dipeptide; Enantioselectivity; Electroosmosis; Chemometrics; Molecular Descriptor; Structure-Enantioselectivity Relationship; Pharmaceutical chemistry; Farmaceutisk kemi; Analytical Pharmaceutical Chemistry; Analytisk farmaceutisk kemi;

    Sammanfattning : This thesis describes the use of chiral counter-ions for the enantiomeric separation of amines in non-aqueous capillary electrophoresis. The investigations have been concentrated on studies of the influence, of the chiral counter-ion, the solvent, the electrolyte and the analyte, on the enantioselective separation. LÄS MER