Sökning: "olivine"

Visar resultat 31 - 35 av 51 avhandlingar innehållade ordet olivine.

  1. 31. Magma plumbing architecture in Indonesia and the North Atlantic Igneous Province

    Författare :Börje Dahrén; Valentin R Troll; Abigail K. Barker; Steffi Burchardt; Ben Ellis; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; magma plumbing; geothermobarometry; plagioclase; clinopyroxene; magma-crust interaction; hazard mitigation; Geovetenskap med inriktning mot mineralogi; petrologi och tektonik; Earth Science with specialization in Mineral Chemistry; Petrology and Tectonics;

    Sammanfattning : Magma plumbing systems represent the physical framework of magma transport and storage from the source region in the mantle, through the crust, until reaching the surface in a volcanic eruption. Characterising the different aspects of magma plumbing, in particular the distribution of magma storage zones throughout the crust, is of key importance to better understand the behaviour of individual volcanoes. LÄS MER

  3. 32. Comprehensive Description of the Interactions between Silicate Bed Materials and Biomass Ash during DFB gasification

    Författare :Robin Faust; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The utilization of biomass for energy generation is a CO2 neutral alternative to fossil fuel. A suitable way of thermal conversion of biomass is dual fluidized bed (DFB) gasification where biomass is converted to a raw gas which can subsequently be used for chemical synthesis. LÄS MER

  4. 33. Thermodynamic study of the FeO-MgO-Al2O3-SiO2 system : Data assessment and phase diagram calculation

    Författare :Olga Fabrichnaya; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; mineralogi; petrologi och tektonik; Mineral Chemistry; Petrology and Tectonics;

    Sammanfattning : This dissertation consists of assessed thermodynamic properties for phases in the geologically and industrially important system Fe-Mg-Al-Si-O and calculated phase diagrams. Mathematical processing of different kinds of experimental data (phase equilibrium data, calorimetric, volumetric, thermophysical,electrochemical, activity data) is used to derive internally consistent thermodynamic database. LÄS MER

  5. 34. Experimental studies of ash transformation processes in combustion of phosphorus-rich biomass fuels

    Författare :Alejandro Grimm; Britt-Marie Steenari; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Engineering; Energiteknik;

    Sammanfattning : The present thesis is a summary of eight papers dealing with experimental studies on bed agglomeration, slag formation, formation of deposits and fine particulate matter during combustion of phosphorus-rich biomass fuels. The experimental procedures were performed in a bubbling fluidized bed (5 kW), two fixed bed appliances (20 and 15 kW) and in a powder burner (150 kW). LÄS MER

  7. 35. Layer formation on quartz particles during fluidized bed combustion/gasification of woody biomass

    Författare :Hanbing He; Christoffer Boman; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Engineering; Energiteknik;

    Sammanfattning : The formation of sticky layers on bed particles has been considered as a prerequisite for bed agglomeration in fluidized bed combustion and gasification of woody fuels. In addition, the layer formed makes the bed particle less resistant against fragmentation. The fragments from quartz particles can result in deposition. LÄS MER