Sökning: "Cleaning"

Visar resultat 1 - 5 av 317 avhandlingar innehållade ordet Cleaning.

  1. 1. Photocatalytic TiO2 thin films for air cleaning : Effect of facet orientation, chemical functionalization, and reaction conditions

    Författare :Bozhidar Stefanov; Lars Österlund; Gunnar Niklasson; Claes-Göran Granqvist; Peter Christian Kjærgaard Vesborg; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; titanium dioxide; photocatalysis; thin films; surface functionallization; acetaldehyde; indoor air cleaning; sputter deposition; crystallographic modifications; preferential orientation; self-cleaning surfaces; Teknisk fysik med inriktning mot fasta tillståndets fysik; Engineering Science with specialization in Solid State Physics;

    Sammanfattning : Poor indoor air quality is a source of adverse health effects. TiO2 coatings deposited on well-illuminated surfaces, such as window panes, can be used to fully mineralize indoor air pollutants by photocatalysis. LÄS MER

  3. 2. Fouling and cleaning of solid surfaces. The influence of surface characteristics and operating conditions

    Författare :Camilla Karlsson; Livsmedelsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Food and drink technology; ellipsometry; sodium hydroxide; anionic surfactant; betalactoglobulin; protein; stainless steel; hydrophilic surface; hydrophobic surface; cleaning; adsorption; fouling; Livsmedelsteknik; Chemical technology and engineering; Kemiteknik och kemisk teknologi;

    Sammanfattning : The severe fouling common in food processing puts high demands on equipment cleaning. Adsorption of the protein betalactoglobulin to solid surfaces and its subsequent removal were followed using in situ ellipsometry. Most experiments were done in a stirred cuvette. Additionally, a flow cell was designed, which was employed in some work. LÄS MER

  4. 3. Nanofiltration at elevated temperatures: Influence of the combined effects of temperature, salts, pH and cleaning

    Författare :Mattias Nilsson; Livsmedelsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elevated temperatures; Electroviscous friction; Energy; pH; Economics; Nanofiltration; Pre-treatment; Salt; Swelling; Membrane performance; Cleaning; Temperature;

    Sammanfattning : The influence of temperature, salts, pH, and various pre-treatments and cleaning on the nanofiltration (NF) performance of thin-film polyamide (PA) composite membranes has been investigated. The change in membrane performance was correlated to membrane swelling or/and electroviscous friction. LÄS MER

  5. 4. Catalytic tar cleaning of biomass-derived gas with simultaneous catalyst regeneration

    Författare :Fredrik Lind; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Tar cleaning; Catalytic gas cleaning; Biomass gasification;

    Sammanfattning : Tar cleaning of raw gas from biomass gasification is a necessary operation before the gas can be used as feedstock for synthetic fuels. The technology for gas cleaning that is commercially available today (scrubber systems), is associated with problems like heat penalties and loss of the chemically stored energy within the tars. LÄS MER

  7. 5. Enabling a Robot for Underwater Surface Cleaning

    Författare :Houssam Albitar; Amy Loutfi; Anani Ananiev; Mikael Ekström; Örebro universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; underwater robot; underwater cleaning; biofouling; adhesion; locomotion; stability; Reglerteknik; Automatic Control;

    Sammanfattning : Biofouling build-up on submerged structures such as ships, petroleum and gas storage tanks, electric power plants, bridges, oil rigs etc. is a major problem that affects the surface material of the structure, the eventual hydrodynamic quality of the surface and in some cases the efficacy of cooling systems. LÄS MER