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Visar resultat 1 - 5 av 24 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Cobalt catalyst supports for Fischer-Tropsch synthesis

    Författare :Fatima Pardo-Tarifa; Lars J. Pettersson; Olga Guerrero; KTH; []
    Nyckelord :Silica; alumina; zirconium; cerium; mesoporous materials; nanoparticles; microemulsion; atrane route; cobalt catalyst; Fischer-Tropsch synthesis; Chemical Engineering; Kemiteknik;

    Sammanfattning : In the Fischer-Tropsch (FT) synthesis, CO and H2 (synthesis gas) are converted into hydrocarbons that can be further upgraded to high-quality fuels and chemicals. Different carbon sources such as natural gas, coal and biomass can be used as feed-stocks for the synthesis gas. LÄS MER

  3. 2. Fischer-Tropsch Synthesis over Cobalt-based Catalysts for BTL applications

    Författare :Matteo Lualdi; Christofer Leygraf; Roy Johnsen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cobalt; Fischer-Tropsch; syngas; selectivity;

    Sammanfattning : Fischer-Tropsch synthesis is a commercial technology that allows converting synthesis gas, a mixture of CO and H2, into fuels and chemicals. This process could be one of the actors in the reduction of oil dependency of the transportation sector. LÄS MER

  4. 3. An Experimental Study of Fischer-Tropsch Fuels in a Diesel Engine

    Författare :Monica Larsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Alternative Fuels; Fischer-Tropsch; GTL;

    Sammanfattning : Alternative fuels for Diesel engines include ester-based fuels (derived from sources such as rapeseed, soybeans and palm oil), dimethyl ether, and various synthetic fuels. Use of these fuels could contribute to a cleaner environment, reduce global warming and improve the human health by reducing levels of harmful emissions. LÄS MER

  5. 4. Fischer-Tropsch and FAME Fuels as Alternatives for Diesel Engines; an Experimental Study

    Författare :Monica Johansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Emissions; SME; Fischer-Tropsch; NOx; Combustion; Alternative fuels; Soot; Biodiesel; RME; FAME; GTL; PME;

    Sammanfattning : Research into alternative fuels is necessitated by our heavy reliance on limited oil reserves and increasingly strict emissions legislation. The studies reported in this thesis involved conducting engine tests using alternatives to fossil Diesel fuel in both heavy-duty and light-duty single cylinder engines. LÄS MER

  7. 5. Deactivation of cobalt and nickel catalysts in Fischer-Tropsch synthesis and methanation

    Författare :Javier Barrientos; Magali Boutonnet; Claude Mirodatos; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cobalt; nickel; Fischer-Tropsch synthesis; methanation; deactivation; carbonyl; sintering; carbon fomation. sulfur; poisoning; Chemical Engineering; Kemiteknik;

    Sammanfattning :             A potential route for converting different carbon sources (coal, natural gas and biomass) into synthetic fuels is the transformation of these raw materials into synthesis gas (CO and H2), followed by a catalytic step which converts this gas into the desired fuels. The present thesis has focused on two catalytic steps: Fischer-Tropsch synthesis (FTS) and methanation. LÄS MER