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Showing result 1 - 5 of 187 swedish dissertations matching the above criteria.

  2. 1. Investigation of hyperfine structure in Nb and Rh

    Author : Jonas Persson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; double-resonance; Rh; parameterisation; hyperfine structure; laser spectroscopy; radiofrequency spectroscopy; Nb; effective operator;

    Abstract : .... READ MORE

  4. 2. Interaction of some molecules with complex surfaces

    Author : Andrea Resta; Synkrotronljusfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Catalysis; Ethylene; CO.; Surface Science; Vicinal surface; Ethanol; Rh;

    Abstract : This thesis investigates the adsorption, decomposition and reactions of small molecules on flat, oxidised and vicinal surfaces of late transition metals. The main technique for these studies is high resolution core level spectroscopy (HRCLS). All the studies presented in the thesis are performed in Ultra High Vacuum (UHV). READ MORE

  5. 3. Rhodium diesel-reforming catalysts for fuel cell applications

    Author : Xanthias Karatzas; Lars J. Pettersson; James Spivey; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Autothermal reforming; auxiliary power unit; BET; chemisorption; diesel; fuel cell; hydrogen; monolith; reforming catalyst; reformer design; Rh; RhPt alloy; TEM; TPO; TPR; XRD; XPS; zone coating; Chemical engineering; Kemiteknik;

    Abstract : Heavy-duty diesel truck engines are routinely idled at standstill to provide cab heating or air conditioning, and in addition to supply electricity to comfort units such as radio and TV. Idling is an inefficient and unfavorable process resulting in increased fuel consumption, increased emissions, shortened engine life, impaired driver rest and health, and elevated noise. READ MORE

  6. 4. Parameters influencing inclusion compositions in Al-killed steel melts during a secondary refining process

    Author : Takanori Yoshioka; Andrey Karasev; Pär Jönsson; Joohyun Park; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-metallic inclusion; ladle furnace; RH; thermodynamics; contact angle; Al2O3; MgO•Al2O3 spinel; calcium aluminate; CaS.;

    Abstract :      This study was carried out to clarify the factors influencing the evolution of inclusions in Al-killed steel melts during a secondary refining process. First, a case-hardening steel was the subject of study to understand the factors influencing the inclusion compositions in the steel melt. READ MORE

  7. 5. In situ structural studies and gas phase visualization of model catalysts at work

    Author : Sara Blomberg; Synkrotronljusfysik; []
    Keywords : CO-oxidation; model catalysts; AP-XPS; PLIF; Pd; Rh; PdAg; Fysicumarkivet A:2017:Blomberg;

    Abstract : This thesis reports on in situ structural studies relevant to a catalytic surface during CO oxidation. The materials that have been studied are palladium, rhodium and an alloy of palladium and silver, with applications in emission cleaning by catalytic converters in vehicles. READ MORE