Search for dissertations about: "Ethene"

Showing result 1 - 5 of 12 swedish dissertations containing the word Ethene.

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

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Katrin Kortsdottir; KTH.; [2016]
    Keywords : 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;

    Abstract : 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. READ MORE

  2. 2. DNA adducts formed by ethene and butadiene : quantitative analysis in rats and humans

    University dissertation from Stockholm : Karolinska Institutet, Biosciences and Nutrition

    Author : Chunyan Zhao; Karolinska Institutet.; Karolinska Institutet.; [2000]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; DNA adducts; 32P-postlabelling; cancer; genotoxicity; ethene; ethylene oxide; 1; 3-butadiene; epoxybutanediol;

    Abstract : The present study has focused on DNA adduct formation by two important industrial and environmental chemicals, ethene and butadiene, in rats and humans. Ethene and butadiene are among the 50 chemicals produced in greatest volume in the United States. READ MORE

  3. 3. Theoretical studies of response properties of organic molecules

    University dissertation from Chemical Center, Lund University

    Author : Anders Bernhardsson; Lunds universitet.; Lund University.; [1999]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; kvantkemi; Teoretisk kemi; Theoretical chemistry; quantum chemistry;

    Abstract : In this thesis eight papers are presented. They represent development of theory and implementation technique in quantum chemistry, as well applications. The first two papers describe advances in geometry optimization techniques. READ MORE

  4. 4. Development of infrared spectroscopy techniques for environmental monitoring

    University dissertation from Department of Physics, Lund University

    Author : Jonas Sandsten; Lunds universitet.; Lund University.; [2000]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; environmental pollution measurements; infrared spectrometers; diffraction and scattering; absorption spectroscopy; remote sensing; ray tracing; image processing; Atomic and molecular physics; Atom- och molekylärfysik; Fysicumarkivet A:2000:Sandsten;

    Abstract : Infrared spectroscopy techniques have long been utilized in identifying and quantifying species of interest to us. Many of the elementary molecules in the atmosphere interact with infrared radiation through their ability to absorb and emit energy in vibrational and rotational transitions. READ MORE

  5. 5. Synthesis of 11C-labelled Alkyl Iodides Using Non-thermal Plasma and Palladium-mediated Carbonylation Methods

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Jonas Eriksson; Uppsala universitet.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; isotopic labelling; carbon-11; alkyl iodides; acrylamides; specific radioactivity; carbonylation; carbon monoxide; non-thermal plasma; PET; Organisk kemi;

    Abstract : Compounds labelled with 11C (β+, t1/2 = 20.4 min) are used in positron emission tomography (PET), which is a quantitative non-invasive molecular imaging technique. It utilizes computerized reconstruction methods to produce time-resolved images of the radioactivity distribution in living subjects. READ MORE