Sökning: "pyrolysis"

Visar resultat 1 - 5 av 98 avhandlingar innehållade ordet pyrolysis.

  1. 1. Pyrolysis of biomass. Rapid pyrolysis at high temperature. Slow pyrolysis for active carbon preparation

    Detta är en avhandling från Stockholm : Kemiteknik

    Författare :Rolando Zanzi; KTH.; [2001]
    Nyckelord :rapid pyrolysis; pyrolysis; wood; agricultural residues; biomass; char; tar; gas; char reactivity; gasification; steam; active carbon;

    Sammanfattning : Pyrolysis of biomass consists of heating solid biomass inthe absence of air to produce solid, liquid and gaseous fuels.In the first part of this thesis rapid pyrolysis of wood(birch) and some agricultural residues (olive waste, sugarcanebagasse and wheat straw in untreated and in pelletized form) athigh temperature (800ºC–1000ºC) is studied ina free fall reactor at pilot scale. LÄS MER

  2. 2. Modelling of the pyrolysis of large wood particles

    Detta är en avhandling från Stockholm : KTH

    Författare :Michel Bellais; KTH.; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; drying; modelling; pyrolysis; shrinkage; wood; TECHNOLOGY Chemical engineering Chemical process and manufacturing engineering Chemical energy engineering; TEKNIKVETENSKAP Kemiteknik Kemisk process- och produktionsteknik Kemisk energiteknik;

    Sammanfattning : Wood is an interesting alternative to fossil fuels. It is CO2-neutral and widely available. However it is a difficult fuel to handle which features a low energy content. Thus technologies for wood thermal conversion need to be improved. LÄS MER

  3. 3. Pyrolysis profiles and global kinetics of tropical biomass : coconut and cashew nut shells

    Detta är en avhandling från Stockholm : KTH

    Författare :Alberto Júlio Tsamba; KTH.; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermogravimetry; cashew nut cocnut shells; pyrolysis; kinetics; TECHNOLOGY Materials science Other materials science; TEKNIKVETENSKAP Teknisk materialvetenskap Övrig teknisk materialvetenskap;

    Sammanfattning : Biomass has been recognised as renewable and environmentally friendly source of energy since decades. Tropical biomasses which are available in large quantities as residues in Latin America, Africa and Asia, have high energy potential for exploitation through thermochemical conversion process, as pyrolysis, gasification or combustion. LÄS MER

  4. 4. Analytical Pyrolysis - Studies of Sulfur in Coal and Pulp

    Detta är en avhandling från Analytical Chemistry, Lund University

    Författare :Pernille Selsbo; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; sulfur; pulp; PLS; PCA; fractionated pyrolysis; FPD; analytical pyrolysis; coal; Analytical chemistry; Analytisk kemi;

    Sammanfattning : Sulfur in coal and pulp have been characterized using pyrolysis–gas chromatography with a sulfur-selective flame photometric detector (Py–GC/FPD). The samples (50–150 µg) were pyrolyzed at temperatures between 300 and 1400°C usually followed by a combustion in oxygen at high temperature (>1000°C). LÄS MER

  5. 5. Catalytic Steam Pyrolysis of Biomass for Production of Liquid Feedstock

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

    Författare :Efthymios Kantarelis; KTH.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Pyrolysis; Catalytic Cracking; Catalytic Upgrading; Biomass to Liquids; Bio-fuels; Πυρόλυση; Καταλυτική διάσπαση; Καταλυτική αναβάθμιση; Biomass to Liquids; Βιοκαύσιμα; Pyrolys; Katalytisk Krackning; Katalytisk uppgradering; Biomass to Liquids; biobränslen; Chemical Engineering; Kemiteknik; Energiteknik; Energy Technology; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : The current societal needs for fuels and chemical commodities strongly depend on fossil resources. This dependence can lead to economic instabilities, political problems and insecurity of supplies. LÄS MER