Sökning: "ash interaction"

Visar resultat 6 - 10 av 29 avhandlingar innehållade orden ash interaction.

  1. 6. Experimental studies of ash transformation processes in thermochemical conversion of P-rich biomass and sludge

    Författare :Gustav Häggström; Marcus Öhman; Rainer Backman; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ash transformation; phosphorus recovery; sewage sludge; chicken manure; Energy Engineering; Energiteknik;

    Sammanfattning : The efficient use of resources and sustainable recovery of various materials are important to minimize the anthropogenic impact on the climate and environment. One such resource is the phosphorus present in manure and sewage sludge. LÄS MER

  3. 7. Studies of ash transformation processes in thermochemical co-conversion of phosphorus-rich manure and sludge with biomass residues

    Författare :Gustav Häggström; Marcus Öhman; Anders Lagerkvist; Nils Skoglund; Flemming Jappe Frandsen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sewage sludge; agricultural residues; forest residues; ash transformation; potassium; phosphorus; combustion; gasification; phosphorus recovery; Energy Engineering; Energiteknik;

    Sammanfattning : Efficient use of resources and sustainable recovery of various materials are important to minimize the anthropogenic impact on the climate and environment. One such resource is the phosphorus (P) present in manure and sewage sludge. LÄS MER

  4. 8. Fluidized bed combustion and gasification for phosphorus recovery by co-conversion of sewage sludge with biomass

    Författare :Thomas Karl Hannl; Marcus Öhman; Matthias Kuba; Nils Skoglund; Mikko Hupa; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Combustion; gasification; sewage sludge; agricultural residues; fluidized bed; ash chemistry; bed material; phosphorus; fuel design; Energy Engineering; Energiteknik;

    Sammanfattning : In recent years, the thermal conversion of sewage sludge has proven its applicability for managing this inevitably generated waste. The viability arises from the concomitant features of recovering energy or valuable compounds, the breakdown of potentially harmful organic compounds, the separation or immobilization of heavy metals, and the formation of volume-reduced, sanitized residues. LÄS MER

  5. 9. Phosphorus recovery from sewage sludge fluidized bed gasification processes

    Författare :Thomas Karl Hannl; Marcus Öhman; Matthias Kuba; Nils Skoglund; Flemming Jappe Frandsen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gasification; sewage sludge; agricultural residues; bed material; fluidized bed; feldspar; ash transformation; potassium; phosphorus; ICP-AES MS; SEM; EDS; XRD; thermodynamic equilibrium modeling; Energy Engineering; Energiteknik;

    Sammanfattning : One of the most sustainable pathways of sewage sludge treatment in recent years has been thermal conversion. The benefits of thermal treatment of sewage sludge are the recovery of energy or valuable chemical products, the destruction of harmful organic compounds, the separation of heavy metals from the P-rich coarse ash fraction, and the decreased and sanitized ash volume. LÄS MER

  7. 10. Using affordable materials from metallurgical industries in Oxygen Carrier Aided Combustion and Chemical-Looping Combustion

    Författare :Felicia Eliasson Störner; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Oxygen carriers; Ash interactions; Potassium interactions; Chemical-Looping Combustion; Oxygen Carrier Aided Combustion;

    Sammanfattning : Oxygen carriers are solid oxides of transition metals that can be used to convert fuel in the absence of gaseous oxygen in a process called Chemical-Looping Combustion (CLC). The use of oxygen carriers makes it possible to produce undiluted CO2 without expensive gas separation. LÄS MER