Sökning: "chemical methods"

Visar resultat 16 - 20 av 2290 avhandlingar innehållade orden chemical methods.

  1. 16. Methane oxidation over palladium oxide. From electronic structure to catalytic conversion

    Författare :Maxime van den Bossche; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; core-level spectroscopy; heterogeneous catalysis; PdO 101 ; palladium oxide; methane oxidation; microkinetic modelling; density functional theory;

    Sammanfattning : Understanding how catalysts work down to the atomic level can provide ways to improve chemical processes on which our contemporary economy is heavily reliant. The oxidation of methane is one such example, which is important from an environmental point of view. LÄS MER

  3. 17. Manufacture of straw MDF and fibreboards

    Författare :Sören Halvarsson; Håkan Edlund; Magnus Norgren; Thomas Amidon; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rice; Wheat; Straw; MDF; HDF; UF; MUF; MDI; Non-resin; binderless MDF; Ash; Silicon; SEM; Hot-pressing; MOR; MOE; IB; Thickness swelling; MDF properties; fibre swelling; WRV; Refining; Defibration.; NATURAL SCIENCES; NATURVETENSKAP; Chemical engineering; Kemiteknik; Chemical process and manufacturing engineering; Kemisk process- och produktionsteknik;

    Sammanfattning : The purpose of this thesis was to develop an economical, sustainable, and environmentally friendly straw Medium Density Fibreboard (MDF) process, capable of full-scale manufacturing and to produce MDF of requested quality. The investigated straw was based on wheat (Triticum aestivum L.) and rice (Oryzae sativa L.). LÄS MER

  4. 18. Recovery of Rare Earth Elements from spent Nickel-Metal Hydride Batteries from Hybrid Electric Vehicles

    Författare :Kivanc Korkmaz; Kerstin Forsberg; Åke C. Rasmuson; Gisele Azimi; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Rare earth elements; hybrid electric vehicles; recycle; nickel; cobalt; precipitation; anti-solvent crystallization; selective roasting; Sällsynta jordartsmetaller; hybridelektriska fordon; återvinning; nickel; kobolt; utfällning; förträngningskristallisation; selektiv rostning; Chemical Engineering; Kemiteknik;

    Sammanfattning : Rare earth elements (REE) are a group of elements that are of critical importance in numerous technological applications, including “green technologies” such as wind turbines and hybrid car batteries. When the criticality of applications is considered, problems in supply has brought the option of effective secondary resource utilization into consideration. LÄS MER

  5. 19. Chemical intolerance : disability and health aspects from a biopsychosocial perspective

    Författare :Anna Söderholm; Ingrid Liljelind; Steven Nordin; Berit Edvardsson; Christer Jansson; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Chemical intolerance; multiple chemical sensitivity; sensory hyperreactivity; environmental intolerance; International Classification of Functioning; Disability and Health ICF ; questionnaire development; reliability; validity; coping; lived experience; mixed method; Public health; folkhälsa;

    Sammanfattning : Background: Chemical intolerance (CI) is a term used for individuals experiencing symptoms triggered by odorous and pungent substances such as perfume, cleaning agents, mold smell and tobacco smoke. The prevalence of CI range from 0.5-52% depending on definition, and it is overrepresented among women. LÄS MER

  7. 20. Assessing Carbon Dioxide Removal methods amid uncertainty : soil carbon sequestration, biochar and harvested wood products as methods for climate change mitigation

    Författare :Alexander Olsson; Stefan Grönkvist; Mathias Fridahl; Anders Hansson; Lowe Börjeson; KTH; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Carbon Dioxide Removal CDR ; Negative Emissions Technologies NETs ; Soil Organic Carbon; Biochar; Harvested Wood Products HWP ; Socio-technical systems; Strategic Niche Management SNM ; Chemical Engineering; Kemiteknik;

    Sammanfattning : Measures to sequester carbon dioxide (CO2) away from the atmosphere have become increasingly important in the discussion of which methods humans can employ to limit global warming. These measures, which are broad and varied, fall under the umbrella of Carbon Dioxide Removal (CDR) methods. LÄS MER