Sökning: "Kemiteknik och kemisk teknologi Chemical technology and engineering"

Visar resultat 26 - 30 av 152 avhandlingar innehållade orden Kemiteknik och kemisk teknologi Chemical technology and engineering.

  1. 26. Thin films of molecular sieves : synthesis and applications

    Författare :Jonas Hedlund; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Technology; Kemisk teknologi;

    Sammanfattning : The seed film method for synthesis of ultra thin and thin molecular sieve films was developed. The versatility of the method was demonstrated by successful preparation of films of a number of molecular sieves (silicate-1, ZSM-5, NA) on various supports (silicon, alumina, gold, etc.). LÄS MER

  3. 27. Diffusion studies in gels using holographic laser interferometry

    Författare :Charlotte Mattisson; Avdelningen för kemiteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chemical potential; ionic strenght; pH; cubic phase; partition coefficient; holographic laser interferometry; holography; pullulan; lysozyme; BSA; macromolecules; diffusion; gel; Poisson-Boltzmann; Chemical technology and engineering; Kemiteknik och kemisk teknologi;

    Sammanfattning : This thesis is an investigation of the potential of holographic laser interferometry for the study of diffusion of both small solutes and macromolecules. An investigation on the importance of errors due to light deflection in refarctive index gradients showed that the magnitude of the refractive index gradients were negligible for the system investigated. LÄS MER

  4. 28. Studies of partial oxidation and combustion over heterogeneous catalysis by transient experiments

    Författare :Andreas Hinz; Avdelningen för kemiteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Catalytic combustion; Selective Oxidation; Sulphur dioxide; Ammonia; Methanol; Propane; Metal catalysts; Metal oxide catalysts; Transients; Simulation; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Carbochemistry; petrochemistry; fuels and explosives technology; Petrokemi; bränslen; sprängämnen;

    Sammanfattning : Transient experiments are one of many techniques available to study heterogeneous catalysis and the catalysts used. The results obtained by transient experiments contain valuable information that is helpful in explaining reaction mechanism and interaction at the catalytic surface. LÄS MER

  5. 29. Studies of a Heavy-Duty Diesel Aftertreatment System Based on the NOX Storage and Reduction Technology

    Författare :Klaus Papadakis; Avdelningen för kemiteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fuel penalty; injection parameters; DoE; design of experiments; exhaust; diesel engine; NO oxidation; simulation; modelling; oxidation catalyst; NOX trap; NOX storage and reduction; NSR; Kemiteknik och kemisk teknologi; Chemical technology and engineering; dosing strategy; system optimisation;

    Sammanfattning : The legislative limits for NOX emissions in the exhaust gas from heavy-duty diesel engines will be decreased in the European Union from today 3.5 g/kWh (Euro IV) to 2.0 g/kWh in 2008 (Euro V). In the USA and Japan a similar trend can be seen. LÄS MER

  7. 30. Aspects of Sorption Processes in Thermosiphon and in Falling Film Arrangements

    Författare :Henrik Kockum; Avdelningen för kemiteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mass transfer; turbulence; falling film; heat transfer; entropy generation; pressure drop; restriction; friction; void fraction; two-phase flow; thermosiphon; sorption; heat pump; model; Chemical technology and engineering; Kemiteknik och kemisk teknologi;

    Sammanfattning : A study concerning closure relations pertinent to the design of sorption equipment of absorption heat pumps has been undertaken. Specifically, thermosiphon and vertical falling film arrangements were studied. LÄS MER