Sökning: "catalyst screening"

Visar resultat 6 - 10 av 31 avhandlingar innehållade orden catalyst screening.

  1. 6. Development of ring-opening catalysts for diesel quality improvement

    Författare :Ulf Nylén; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ring opening; naphthenes; cetane number improvement; indan; light cycle oil LCO ; Pt-Ir catalyst; catalyst characterization; aromatic sulphur compounds; GC-SCD; distribution; analysis;

    Sammanfattning : The global oil refining industry with its present shift inproduct distribution towards fuels such as gasoline and dieselwill most likely hold the fort for many years to come. However,times will change and survival will very much depend onprocessing flexibility and being at the frontiers of refiningtechnology, a technology where catalysts play leading roles. LÄS MER

  3. 7. Studies of Supported Catalysts for Environmental Applications: - Flow Reactor Measurements, Monte Carlo Simulations and High Throughput Screening

    Författare :Peter Thormählen; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; catalytic oxidation of carbon monoxide; supported heterogeneous catalysts; flow reactor measurements; high throughput screening; low temperature catalytic activity; cobalt oxide; platinum; temperature programmed methods; Monte Carlo simulations; environmental catalysis;

    Sammanfattning : The use of heterogeneous catalysts for environmental applications, primarily for reduction of harmful emissions from vehicles and stationary sources, has successively increased during the last three decades. Driven by emission regulations, research and development within this area attract large interest and resources, especially for automotive applications. LÄS MER

  4. 8. Heterogeneous catalysis in racemization and kinetic resolution along a journey in protein engineering

    Författare :Tamás Görbe; Jan-Erling Bäckvall; Frank Hollmann; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; racemization; protein engineering; kinetic resolution; heterogeneous catalysis; biohybrid catalyst; organisk kemi; Organic Chemistry;

    Sammanfattning : The first part of my thesis concerns the use of heterogeneous acidic resins for racemization of tert-alcohols without any side-product formation. The focus was to develop a system which can be further extended to a DKR protocol consisting of an enzymatic KR reaction. LÄS MER

  5. 9. Efficient Synthesis and Analysis of Chiral Cyanohydrins

    Författare :Stina Lundgren; Christina Moberg; Ben Feringa; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; asymmetric catalysis; cyanohydrins; microreactor; polymersupported catalyst; ketonitriles; titanium; lanthanide; Lewis acid; Lewis base; Organic chemistry; Organisk kemi;

    Sammanfattning : This thesis deals with the development of new methods for efficient synthesis and analysis in asymmetric catalysis. It focuses on the preparation of chiral cyanohydrins by enantioselective addition of cyanide to prochiral aldehydes. LÄS MER

  7. 10. Hydrogen generation from dimethyl ether by autothermal reforming

    Författare :Marita Nilsson; Lars Pettersson; Ann Cornell; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; autothermal reforming; auxiliary power unit; dimethyl ether; fuel cell; hydrogen; palladium; reforming catalyst; temperature-programmed reduction; truck idling; X-ray diffraction; zinc; Chemical engineering; Kemiteknik;

    Sammanfattning : Heavy-duty trucks are in idle operation during long periods of time, providing the vehicles with electricity via the alternator at standstill. Idling trucks contribute to large amounts of emissions and high fuel consumption as a result of the low efficiency from fuel to electricity. LÄS MER