Search for dissertations about: "aromatics"

Showing result 11 - 15 of 45 swedish dissertations containing the word aromatics.

  2. 11. Alkylation and Hydrodearomatization over Zeolite cCatalysts

    Author : Jun-Jun Yuan; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Acid catalysts; ZSM-5 catalysts; ethylbenzene; toluene; temperature; diesel fuel; hydrodearomatization; benzene; acidic protons; activity and selectivity; aqueous ethanol; Pt Y zeolite; gasoline; pressure; GC; diethylbenzene; Hydrocracking; SiO2 Al2O3 ratio; alkylation of aromatics; Brønsted acids;

    Abstract : The alkylation of aromatic compounds is widely used in the large-scale synthesis of petrochemicals, and a great variety of fine chemicals and intermediates. Acid catalysts used for alkylation of aromatic hydrocarbons are Brønsted acids containing acidic protons. READ MORE

  4. 12. Alkylation of benzene/ethanol and toluene/methanol over ZSM-5

    Author : Junjun Yuan; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; alkylation of aromatics; benzene; xylene isomers; toluene; ethanol; zeolites; ethylbenzene; Bronsted acids; acid catalysts; GC; SiO2 Al2O3; acidic protons; ration; activity and selectivity;

    Abstract : .... READ MORE

  5. 13. Green aromatics for a bio-based economy - Valorization of biomass derived model compounds over zeolites studied by online analysis

    Author : Christopher Sauer; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; online analysis; zeolite; biomass conversion; catalysis; 2; 5-dimethylfuran;

    Abstract : In the strive towards sustainable chemical production, its carbon-based products can no longer be produced from fossil resources but need to be manufactured from a renewable feedstock. Simple aromatic building blocks like benzene, toluene and xylenes (BTX) can be obtained by catalytic valorization of biomass derived platform molecules such as furans provided efficient catalysts can be formulated. READ MORE

  6. 14. Carbon materials: towards a circular economy through thermochemical recycling of mixed waste

    Author : Isabel Cañete Vela; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; plastic waste; circular economy; thermochemical recycling; mixed waste; recycling; Carbon materials; steam cracking;

    Abstract : Carbon-containing materials, such as paper, wood, plastic, and textiles, are essential for our daily lives, being used in everything from clothing to infrastructure. However, their use typically follows a linear pattern, in that we extract carbon resources, create products, and eventually dispose of them, thereby contributing to greenhouse gas (GHG) emissions throughout the supply chain. READ MORE

  7. 15. The inter-and intramolecular selectivity of the carbonate radical anion in its reactions with lignin and carbohydrates

    Author : Magnus Carlsson; Gábor Merényi; Clemens von Sonntag; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; nuclear chemistry; Kemi; Chemistry; Kemi;

    Abstract : In the present thesis, the effects of the carbonate radical anion on lignin and cellulose were investigated. The carbonate radical has a rather high reactivity towards aromatic lignin constituents. It reacts especially fast with phenolates. All these reactions occur by way of electron transfer. READ MORE