Sökning: "lead oxide"

Visar resultat 1 - 5 av 167 avhandlingar innehållade orden lead oxide.

  1. 1. Atmospheric Corrosion of Lead. The Influence of Organic acid Vapours and Inorganic Air Pollutants. A contribution Towards Understanding the Environmental Degradation of Historic Organ Pipes

    Författare :Annika Niklasson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organ pipe; formic acid; Atmospheric corrosion; lead formate; lead acetate; NaCl; lead; acetic acid;

    Sammanfattning : This thesis presents different perspectives on the atmospheric corrosion of lead, aiming at a better understanding of the environmental degradation of historical organ pipes. Corroded organ pipes from the field have been analyzed and the environment inside the organ wind system has been mapped. LÄS MER

  3. 2. Decreased furnace wall corrosion in fluidised bed boilers - The influence of fuel lead content and sewage sludge additive

    Författare :Annika Talus; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; demolition-wood; alkali chlorides; Furnace wall corrosion; lead oxide; used-wood; salt melt; lead oxychloride; sewage sludge; chlorine-induced corrosion;

    Sammanfattning : Usage of used-wood fuel in the power industry has resulted in increased corrosion problems for metallic materials in the boilers, most probably due to relatively high amounts of chlorine, alkali metals and heavy metals present in the fuel.In this investigation, laboratory exposures were performed in order to study the influence of lead content in a wood-based fuel on the corrosion of selected materials. LÄS MER

  4. 3. Atmospheric Corrosion of Historic Lead Organ Pipes

    Författare :Annika Niklasson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atmospheric corrosion; conservation strategies; formiate; historical organs; organ pipe corrosion; lead; oak wood; formic acid; acetic acid; acetate;

    Sammanfattning : The atmospheric corrosion of lead is investigated, with the aim to improve the understanding of the environmental degradation of historical organ pipes. Fieldwork is combined with laboratory investigations. The field studies included characterization of the organ environment and exposures of lead coupons. LÄS MER

  5. 4. CO Oxidation over Oxide Supported Platinum Catalysts

    Författare :Mengqiao Di; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; low-temperature activity; CO oxidation; operando spectroscopy; water promotion; active catalyst support; nitrogen oxide inhibition;

    Sammanfattning : Catalytic oxidation of carbon monoxide (CO) is one of the most studied reactions that still needs to be improved because of its practical use in the chemical industry including feedstock purification and applications such as emission control, in-door air cleaning, improvement of fuel cell efficiency, etc. Concerning CO emissions, the transportation sector is a large contributor. LÄS MER

  7. 5. The structural chemistry of niobium and tantalum oxide fluorides containing divalent lead

    Författare :Örjan Sävborg; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The coordination about divalent lead in oxides and fluorides if reviewed with special reference to the stereochemical activity of the lone pair. An attempt has been made to identify fluorine atoms by using bond strength calculations. LÄS MER