Sökning: "biomass"

Visar resultat 1 - 5 av 941 avhandlingar innehållade ordet biomass.

  1. 1. Biomass to Biofuel : Syngas Cleaning and Biomass Feedstock

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Ramiar Sadegh-Vaziri; KTH.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gas-Solid Reaction; ZnO Sul_dation; Outward Growth; Hollow Particles; Algae Flocculation; PBEs; Fractal Clusters; Restructuring of Clusters; Deposition of Clusters; Primary Particle Aggregation.;

    Sammanfattning : This thesis builds around the idea of a biofuel production process that is comprised of biomass production, biomass gasification, gas cleaning, and fuel production. In this work, we specifically looked into H2S removal as a part of cleaning the producer gas and flocculation of microalgae which is involved in the harvesting of microalgae after biomass production. LÄS MER

  2. 2. Biomass gasification in ABFB Tar mitigation

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Nemanova Vera; KTH.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ash; biomass; char; gasification; iron-based; petcoke; tar; Chemical Engineering; Kemiteknik;

    Sammanfattning : Biomass gasification may be an attractive alternative for meeting future energy demand. Although gasification is a mature technology, it has yet to be fully commercialised due to tar formation. This study focuses on the tar mitigation in gas produced in an atmospheric bubbling fluidised bed (ABFB) gasification system. LÄS MER

  3. 3. Thermochemical and Catalytic Upgrading in a Fuel Context Peat, Biomass and Alkenes

    Detta är en avhandling från Stockholm : Kemiteknik

    Författare :Christina Hörnell; KTH.; [2001]
    Nyckelord :peat; biomass; liquefaction; tetralin; gasification; pyrolysis; tar-cracking; dolomite; silica; heterogeneous oligomerization; alkenes;

    Sammanfattning : .... LÄS MER

  4. 4. From torrefaction to gasification Pilot scale studies for upgrading of biomass

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Martin Strandberg; Umeå universitet.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Torrefaction; biomass; pilot scale; continuous reactor; grindability; entrained flow gasification; degree of torrefaction; biomass powder;

    Sammanfattning : Increasing the share of biomass, preferably by replacing fossil fuels, is one way to mitigate the present climate change. Fossil coal can be directly replaced by co-combustion of coal and biomass and fossil engine fuels (gasoline and diesel) could potentially partly be replaced by synthetic renewable fuels produced via entrained flow gasification of biomass. LÄS MER

  5. 5. High temperature corrosion in biomass-fired energy applications Alloying effects and test environment comparisons

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Ragna Elger; KTH.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; High temperature corrosion; biomass; waste; superheater corrosion; austenitic steel; biomass gasification; alumina-forming austenitic stainless steel; thermodynamic modelling; kinetic modelling; Kemi; Chemistry;

    Sammanfattning : To reduce the greenhouse effect, the use of renewable fuel has to be increased. As renewable fuel has different characteristics compared to fossil fuel regarding content of trace metals, alkali, chlorine and sulphur, the corrosion characteristics in high temperature energy processes have to be evaluated. LÄS MER