Sökning: "ilmenit"

Visar resultat 1 - 5 av 11 uppsatser innehållade ordet ilmenit.

  1. 1. Magnetic Mineralogy of Nb-bearing Carbonatites from Oldoinyo Dili (Tanzania)

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Julia Frejd; [2021]
    Nyckelord :carbonatites; niobium; rare earth elements; Oldoinyo Dili; magnetic properties; karbonatiter; niob; rare earth elements; Oldoinyo Dili; magnetiska egenskaper;

    Sammanfattning : Niobium (Nb) and Rare Earth Elements (REE’s) have in recent years received considerable attention because of their importance to the modern technical industry, and more specifically the enhanced sustainability that comes with them. The main source for Nb and REE’s on Earth are carbonatites and associated alkaline silicate rocks. LÄS MER

  3. 2. Major and trace element geochemical analysis of norites in the Hakefjorden Complex to constrain magma source and magma plumbing systems

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Aodhan Barrett; [2020]
    Nyckelord :Anorthosite; norite; Plagioclase; Hakefjorden Complex; Sweden; Trace Elements; Geochemistry; Magma Origin; Earth and Environmental Sciences;

    Sammanfattning : Major and trace element data taken from plagioclase crystals from anorthosites and related rock units in the Hakefjorden Complex located off the west coast of Sweden were investigated for the purposes of constraining magma chamber processes and the source of the magma. Although the anorthosite units were completely homogenous in regards to its chemistry, the plagioclase in the associated norite and ilmenite-leuconorite units showed substantial variation. LÄS MER

  4. 3. Påverkansfaktorer på vätgasrelaterad reaktivitet hos CFB-flygaskor

    Master-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Sofie Östrem; [2020]
    Nyckelord :CFB flygaska vätgas panna avfall förbränning;

    Sammanfattning : Vätgasbildning vid behandling av flygaska är ett problem många förbränningsanläggningar hanterar. På E.ON i Norrköping har vätgasbildning lett till kraftig explosion i bergrum där flygaska deponeras, men även för askmottagare innebär vätgasbildningen risker då incidenter med självantändande askhögar inträffat. LÄS MER

  5. 4. Investigation of the combustion behavior in a fluidized reactor with oxygen carriers as bed material

    Master-uppsats, KTH/Energi- och ugnsteknik

    Författare :Carl Kajnäs; [2016]
    Nyckelord :Bed materials; Fluidized bed combustion; Gaseous fuels; Oxygen carrier aided combustion; Oxygen carriers.;

    Sammanfattning : The behavior of using oxygen carriers as bed material in a fluidized bed combustion was investigated in this work when methane, air and carbon monoxide, air are used as fluidizing gases. More specifically, conversion rate, unsteadiness and gas composition was investigated and it was found that the conversion rate of carbon monoxide and methane are higher when oxygen carriers are used as bed material compared to silica sand and that the highest conversion rate was for oxygen carriers with high oxygen transport capacity and high reactivity towards the gaseous fuel. LÄS MER

  7. 5. Using Fe-Ti oxides and trace element analysis to determine crystallization sequence of an anorthosite-norite intrusion, Älgön SW Sweden.

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Sara Kullberg; [2015]
    Nyckelord :magma origin; AFC-model; ilmenite; ilmenite-rich leuconorite; anorthosite-norite; Earth and Environmental Sciences;

    Sammanfattning : På Älgön, SV Sverige, finns en anortosit-norit intrusion tillhörande Hakefjordenkomplexet. Det finns dessutom två tillhörande enheter; en marginell monzonorit och en centralt belägen ilmenitberikad norit (IRL). I den ilmenitberikade noriten finns även olika sorters aggregat av Fe-Ti oxider. LÄS MER