Search for dissertations about: "thermochemical properties"

Showing result 6 - 10 of 31 swedish dissertations containing the words thermochemical properties.

  2. 6. Thermochemical model studies of some high temperature solar energy conversion processes

    Author : Mats Lundberg; Umeå universitet; []
    Keywords : solar energy conversion; cyclic processes; water splitting; hydrogen production; carbothermal reduction; Co-Fe-0 system; phase relations; solid state emf measurements;

    Abstract : This thesis is a summary and discussion of five papers, mainly dealing with processes where solar thermal energy is utilized in the production of chemicals with high energy contents. The products considered in the present work are H2, Al, and Mg. READ MORE

  4. 7. Entrained flow studies on biomass fuel powder conversion and ash formation

    Author : Per Holmgren; Markus Broström; Kentaro Umeki; Rainer Backman; Kevin Whitty; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermochemical biomass conversion; particle image velocimetry; gasification; entrained flow reactor; ash transformation; equilibrium calculations; slag formation;

    Abstract : Reducing the global dependence on fossil fuels is of paramount importance in tackling the environmental challenges we face, not only tomorrow, but already today. Biomass offers a renewable supply of CO2-neutral raw material that can be converted into many different forms of fuels and valuable chemicals, making it a prime candidate for the technologies of tomorrow. READ MORE

  5. 8. Enhancing the circular economy: Resource recovery through thermochemical conversion processes of landfill waste and biomass

    Author : Ilman Nuran Zaini; Weihong Yang; Pär Jönsson; Ashwani K. Gupta; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gasification; pyrolysis; waste-to-energy; landfill waste; hydrogen production; circular economy; municipal solid waste; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : Currently, the global economy looses a considerable amount of potential secondary raw materials from the disposed waste streams. Furthermore, the existing landfill sites that often do not have proper environmental protection technologies pose a long-lasting risk for the environment, which urge immediate actions for landfill remediations. READ MORE

  6. 9. Application of fuel design to mitigate ash-related problems during combustion of biomass

    Author : Anders Rebbling; Christoffer Boman; Dan Boström; Marcus Öhman; Nils Skoglund; Sonja Enestam; Umeå universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermochemical energy conversion; biomass; combustion; ash chemistry; fuel design; ash transformation reactions; renewable energy;

    Abstract : The energy supply of today is, through the use of fossil energy carriers,contributing to increased net emissions of greenhouse gases. This hasseveral negative effects on our environment and our climate. In order toreduce the impact of this, and possibly to reverse some of the effects, allrenewable energy sources must be used. READ MORE

  7. 10. Low-temperature carburizing/nitriding of austenitic stainless steels - Influence of alloy composition on microstructure and properties

    Author : Giulio Maistro; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tribology; surface engineering; S-phase; SEM; corrosion; XPS; Austenitic stainless steel; expanded austenite; plasma nitriding; EBSD; XRD; thermal stability; low-temperature carburizing; surface analysis; GDOES;

    Abstract : Austenitic stainless steels are among the most used materials in applications where corrosion resistance is important, as the food, pharmaceutical, chemical, oil and gas industries. However, low hardness and poor tribological properties is often an obstacle for their applicability. READ MORE