Sökning: "CO adsorption"

Visar resultat 16 - 20 av 168 avhandlingar innehållade orden CO adsorption.

  1. 16. Aqueous Processing of WC-Co Powders Aqueous processing of WC-Co powders

    Författare :Karin Andersson; KTH; []
    Nyckelord :Hard metal; cemented carbide; WC-Co; tungsten oxide; tungsten carbide; oxidation; cobalt; dissolution; surface complexation; XPS; AFM; colloidal probe; force curve; Hamaker constant; Cauchy; WO3; CoOOH; CoO; Co3O4; ESCA; zeta-potential; surface poten;

    Sammanfattning : The object of this work is toobtain a fundamental understanding of the principal issuesconcerning the handling of WC-Co powders, in an aqueousmedium.The oxidation and dissolution oftungsten carbide powder dispersed in water was investigatedusing X-ray Photoelectron Spectroscopy (XPS) and leachingstudies. LÄS MER

  3. 17. Aqueous Processing of WC-Co Powders

    Författare :Karin M. Andersson; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hard Metal; Cemented Carbide; WC-Co; Tungsten Carbide; Cobalt; Oxidation; Dissolution; Surface Complexation; XPS; AFM; Colloidal Probe; Hamaker Constant; Cauchy; WO3; CoOOH; ESCA; Zeta-Potential; Surface Potential; Poly ethylene imine ; PEI; Suspensi;

    Sammanfattning : The object of this work is to obtain a fundamentalunderstanding of the principal issues concerning the handlingof an aqueous WC-Co powder suspension.The WO3 surface layer on the oxidised tungsten carbidepowder dissolves at pH>3 with the tungsten concentrationincreasing linearly with time. LÄS MER

  4. 18. Reactivity of small transition-metal clusters with carbon monoxide

    Författare :Lotta Holmgren; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Con< sub>; reaction probability; Nin< sub; time-of-flight mass spectrometry; carbon monoxide; Wnn< sub; Nbn< sub; adsorption; laser vaporisation; supersonic beam; Cun< sub;

    Sammanfattning : .... LÄS MER

  5. 19. Low temperature CO oxidation over Pt/CeO2

    Författare :Noemi Bosio; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Heterogeneous catalysis; Cerium oxide; CO oxidation; kinetic Monte Carlo; density functional theory;

    Sammanfattning : The oxidation of CO to CO2 is a widely studied reaction not only for its practical applications but also for its apparent simplicity. CO oxidation is, in fact, often used as a model reaction for other oxidation reactions. LÄS MER

  7. 20. Biogas Production from Lignocelluloses : Pretreatment, Substrate Characterization, Co-digestion and Economic Evaluation

    Författare :Anna Teghammar; Högskolan i Borås; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biogas; lignocellulose; pretreatment; anaerobic digestion; co-digestion; substrate characterization; economic evaluation; Biotechnology;

    Sammanfattning : Biogas production from organic materials can be used as a renewable vehicle fuel, provide heat and generate electricity and can thereby reduce the greenhouse gas emissions. This thesis focuses on the biogas production based on lignocelluloses. There is an abundant availability of lignocelluloses, constituting 50% of the total biomass worldwide. LÄS MER