Sökning: "ash metals"

Visar resultat 1 - 5 av 61 avhandlingar innehållade orden ash metals.

  1. 1. Chemical Properties of FBC Ashes

    Författare :Britt-Marie Steenari; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; straw ash; environmental impact of ash handling; sintering; deposits; fouling; wood ash recycling; FBC; ash leaching; ash chemistry; PFBC; forest fertiliser; ash hydration reactions; fuel additives; wood ash characteristics; CaS; ash melting; plant nutrient recycling;

    Sammanfattning : In this thesis several aspects of ash chemistry are discussed. An issue of primary concern for boiler operators is the formation of ash deposits. New biomass fuels are introduced, many of which have unfavourable ash melting behaviour due to high levels of alkali metal species and chlorine. LÄS MER

  2. 2. Metals in MSWI fly ash - problems or opportunities?

    Författare :Karin Karlfeldt Fedje; Chalmers University of Technology; []
    Nyckelord :HNO3; water; NH3NO4; MSW ash; pH; metals; solvent extraction; speciation; Cu; leaching;

    Sammanfattning : Incineration of municipal solid waste is a commonly used management method to take care of our waste. However, the residues produced are a problem. They often contain large amounts of potentially toxic metal compounds and soluble salts, which can cause harm to the environment and human health if released from the ash. LÄS MER

  3. 3. Ash chemistry and fuel design focusing on combustion of phosphorus-rich biomass

    Författare :Nils Skoglund; Dan Boström; Rainer Backman; Franz Winter; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; phosphorus; biomass; combustion; ash chemistry; fuel design; ash transformation; phosphorus-rich; ash-forming elements; fuel fingerprint; ash transformation reactions; Lewis base; Lewis acid; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : Biomass is increasingly used as a feedstock in global energy production. This may present operational challenges in energy conversion processes which are related to the inorganic content of these biomasses. As a larger variety of biomass is used the need for a basic understanding of ash transformation reactions becomes increasingly important. LÄS MER

  4. 4. Environmental impact of bio fuel ash in a road constuction

    Författare :Rickard Thurdin; Mittuniversitetet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; ash; centrifugation; DOC; heavy metals; ICP-MS; ion chromotography; leaching; lysimeter; recycling; road construction; soil solution; soil water; Chemistry; Kemi;

    Sammanfattning : .... LÄS MER

  5. 5. Characterisation and speciation of metals in ash

    Författare :Karin Karlfeldt Fedje; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; XAS; Cu catalyst; metal speciation; leaching; MSW ash; PCDD F formation;

    Sammanfattning : .... LÄS MER