Sökning: "toluene"

Visar resultat 1 - 5 av 92 avhandlingar innehållade ordet toluene.

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

    Författare :Junjun Yuan; Chalmers tekniska högskola; []
    Nyckelord :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;

    Sammanfattning : .... LÄS MER

  3. 2. The Impact of Hydrocarbon and Carbon Oxide Impuritiesin the Hydrogen Feed of a PEM Fuel Cell

    Författare :Katrin Kortsdottir; Rakel Wreland Lindström; Göran Lindbergh; Tanja Kallio; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fuel Cell; Hydrogen Impurities; Carbon Monoxide; Carbon Dioxide; Ethene; Propene; Methane; Propane; Toluene; Electrochemically Active Surface Area; Cyclic Voltammetry; Mass Spectrometry; bränslecell; vätgasföroreningar; kolmonoxid; koldioxid; eten; propen; metan; propan; toluen; elektrokemisk aktiv yta; cyklisk voltammetri; masspektrometri; Chemical Engineering; Kemiteknik;

    Sammanfattning : The proton exchange membrane fuel cell generates electricity from hydrogen and oxygen (from air) through electrocatalytic reactions in an electrochemical cell. The Pt/C catalyst, commonly used in PEM fuel cells, is very sensitive to impurities that can interact with the active catalyst sites and limit fuel cell performance. LÄS MER

  4. 3. Alkylation and Hydrodearomatization over Zeolite cCatalysts

    Författare :Jun-Jun Yuan; Chalmers tekniska högskola; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  5. 4. Physiologically based pharmacokinetic modeling in risk assessment - Development of Bayesian population methods

    Författare :Fredrik Jonsson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical biosciences; methyl chloride; dichloromethane; toluene; styrene; uncertainty; intra- individual variability; risk assessment; physiologically based modeling; Markov chain Monte Carlo; PBPK; Bayesian; population modeling; Farmaceutisk biovetenskap; Biopharmacy; Biofarmaci; Biopharmaceutics; biofarmaci;

    Sammanfattning : In risk assessment of risk chemicals, variability in susceptibility in the population is an important aspect. The health hazard of a pollutant is related to the internal exposure to the chemical, i.e. the target dose, rather than the external exposure. LÄS MER

  7. 5. Acute toluene effects on neurotransmission in the central nervous system

    Författare :Karl Stengård; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :acetylcholine; aspartate; cerebellum; dopamine; GABA; globus pallidus; glutamate; microdialysis; rat; striatum; toluene; ;

    Sammanfattning : The aim of this thesis was to develop a method to study the effects of toluene in the central nervous system of the rat. Microdialysis on awake rats was used to study toluene's effects on the transmission of dopamine, acetylcholine, glutamate and aspartate in the striatum, and on GABA in the striatum, the cerebellum and the globus pallidus. LÄS MER