Search for dissertations about: "TAR"

Showing result 1 - 5 of 1115 swedish dissertations containing the word TAR.

  2. 1. Biomass gasification in ABFB : Tar mitigation

    Author : Nemanova Vera; Klas Engvall; Joan Salvadó; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ash; biomass; char; gasification; iron-based; petcoke; tar; Chemical Engineering; Kemiteknik;

    Abstract : 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. READ MORE

  4. 2. Tar and Condensable Hydrocarbons in Indirect Gasification Systems

    Author : Mikael Israelsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; UCS; Tar; condensable species; DFB; HTR.; CS; CLR; SPA;

    Abstract : Biomass gasification, which is a primary process step in the production of biofuels, yields a combustible gas mixture (raw gas). This raw gas consists of a wide range of species, from permanent gases to condensable hydrocarbons, which are collectively known as tar. READ MORE

  5. 3. Alkali Metals and Tar in Biomass Thermochemical Conversion: Development and Application of Online Measurement Techniques

    Author : Dan Gall; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Tar; Alkali Metals; Biomass; Thermochemical conversion; Online Measurements.;

    Abstract : Biomass is a renewable resource that can substitute the fossil-based products we depend on today. However, the conversion techniques require further improvement in order to be competitive with the traditional industry. READ MORE

  6. 4. PFB Air Gasification of Biomass, Investigation of Product Formation and Problematic Issues Related to Ammonia, Tar and Alkali

    Author : Nader Padban; Avdelningen för kemiteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NH3 formation; agglomeration; thermal conversion; PNA; PAH; alkali; tar; Biomass; gasication; ammonia reduction; Chemical technology and engineering; Kemiteknik och kemisk teknologi;

    Abstract : Fluidised bed thermal gasification of biomass is an effective route that results in 100 % conversion of the fuel. In contrast to chemical, enzymatic or anaerobic methods of biomass treatment, the thermal conversion leaves no contaminated residue after the process. READ MORE

  7. 5. A mechanistic description of the evolution of aromatic tar during catalytic upgrading of the raw gas produced from biomass steam gasification

    Author : Huong Nguyen; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biomass gasification; raw gas; catalytic raw gas upgrading; ilmenite; kinetic model; tar;

    Abstract : The removal of tar from the raw gas produced during biomass gasification is a prerequisite for the viability of the process downstream of the gasifier. The tar, the composition of which is dominated by aromatics, readily condenses, leading to process disruption. READ MORE