Sökning: "H2O"

Visar resultat 1 - 5 av 241 avhandlingar innehållade ordet H2O.

  1. 1. Optical and Raman Spectroscopic Studies on H2O at High Pressure

    Detta är en avhandling från Uppsala : Institutionen för geovetenskaper

    Författare :Sara Nanna Kristina Sundberg; Uppsala universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; H2O; diamond anvil cell; equations of state; Raman spectroscopy; interferometry; Geovetenskap; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap;

    Sammanfattning : In this thesis, volumetric, optical and vibrational properties of H2O were studied at high pressures by combining techniques of Raman spectroscopy, interferometry and optical imaging. Pressures up to 7 GPa were generated in the diamond anvil cell (DAC), entering the stability fields of liquid water and ices VI, VII and VIII. LÄS MER

  2. 2. High Temperature Corrosion of Stainless Steels in Low Oxygen Activity Environments -The effect of H2 and H2O

    Detta är en avhandling från Uppsala : Institutionen för geovetenskaper

    Författare :Hamed Hoseini Hooshyar; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pre-oxidation; chromia former; H2O; High Temperature Corrosion; alumina former; H2;

    Sammanfattning : Gasification of biomass and waste is promising for reducing the use of fossil fuels. While the operation conditions of superheaters and gas coolers in the gasifier are restricted by gas-side corrosion, scientific investigations are very scarce in this field. LÄS MER

  3. 3. High Temperature Oxidation and Chlorination of FeCrAl alloys

    Detta är en avhandling från Uppsala : Institutionen för geovetenskaper

    Författare :Niklas Israelsson; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; KCl; pre-oxidation; FeCrAl; H2O; high-temperature corrosion; kinetics;

    Sammanfattning : AbstractThe constant strive for improved efficiency and lower-cost industrial processes often results in progressively higher temperatures and more aggressive environments. High- temperature corrosion is a well-known problem in biomass- and waste-fired boilers and is one of the obstacles to overcome in achieving a more sustainable society. LÄS MER

  4. 4. The influence of SO2 on the high temperature corrosion of Fe and Fe-Cr alloys

    Detta är en avhandling från Uppsala : Institutionen för geovetenskaper

    Författare :Anders Järdnäs; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; iron; H2O; high temperature corrosion; Fe-2.25Cr-1Mo steel; SO2; 304L; oxidation;

    Sammanfattning : Sulfur dioxide is an important pollutant in combustion gases and plays a major role in the high temperature corrosion of many metals and alloys. This work investigates the influence of small amounts of SO2 on the high temperature corrosion of iron, chromium and several Fe-Cr alloys. LÄS MER

  5. 5. NOx Storage and Reduction Catalysts. Reduction with Hydrogen and the Influence of Water and Carbon Dioxide

    Detta är en avhandling från Uppsala : Institutionen för geovetenskaper

    Författare :Anna Maria Lindholm; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NSR catalyst; Pt Ba Al; H2O; CO2; Pt Al; NOx reduction; H2; NH3 formation; NOx storage; Lean NOx Trap; N2O formation; kinetic modeling; Pt Si;

    Sammanfattning : Environmental concern has increased over the past several years and resulted in stringent emission legislation on NOx, CO, and hydrocarbon emissions from automobile exhausts. Moreover, the demands to improve the fuel efficiency of engines and to lower the CO2 emissions have increased, and a way to meet this is by using lean burn engines which operate with oxygen excess. LÄS MER